./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec6_product34.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_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/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_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product34.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/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_c08092c3-835a-4bc9-bfd9-d0c155669ce9/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 4c8df6e468eecbce541189806946dc0233fe629a6f2a971a54d2c5d7914e97b3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:55:37,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:55:37,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:55:37,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:55:37,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:55:37,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:55:37,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:55:37,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:55:37,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:55:37,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:55:37,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:55:37,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:55:37,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:55:37,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:55:37,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:55:37,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:55:37,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:55:37,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:55:37,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:55:37,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:55:37,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:55:37,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:55:37,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:55:37,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:55:37,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:55:37,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:55:37,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:55:37,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:55:37,911 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:55:37,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:55:37,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:55:37,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:55:37,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:55:37,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:55:37,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:55:37,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:55:37,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:55:37,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:55:37,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:55:37,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:55:37,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:55:37,923 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:55:37,960 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:55:37,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:55:37,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:55:37,961 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:55:37,961 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:55:37,962 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:55:37,962 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:55:37,962 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:55:37,962 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:55:37,962 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:55:37,962 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:55:37,963 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:55:37,963 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:55:37,963 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:55:37,963 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:55:37,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:55:37,964 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:55:37,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:55:37,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:55:37,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:55:37,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:55:37,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:55:37,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:55:37,965 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:55:37,966 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:55:37,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:55:37,966 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:55:37,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:55:37,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:55:37,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:55:37,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:55:37,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:55:37,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:55:37,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:55:37,967 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:55:37,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:55:37,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:55:37,968 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:55:37,968 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:55:37,968 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_c08092c3-835a-4bc9-bfd9-d0c155669ce9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c8df6e468eecbce541189806946dc0233fe629a6f2a971a54d2c5d7914e97b3 [2021-11-07 00:55:38,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:55:38,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:55:38,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:55:38,258 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:55:38,258 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:55:38,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec6_product34.cil.c [2021-11-07 00:55:38,360 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/data/d47146a3d/30b2bf30b36a4a19b1e72d488d738ed3/FLAGd7d940541 [2021-11-07 00:55:39,015 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:55:39,016 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/sv-benchmarks/c/product-lines/email_spec6_product34.cil.c [2021-11-07 00:55:39,042 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/data/d47146a3d/30b2bf30b36a4a19b1e72d488d738ed3/FLAGd7d940541 [2021-11-07 00:55:39,211 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/data/d47146a3d/30b2bf30b36a4a19b1e72d488d738ed3 [2021-11-07 00:55:39,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:55:39,216 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:55:39,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:55:39,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:55:39,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:55:39,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:55:39" (1/1) ... [2021-11-07 00:55:39,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b6767e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:39, skipping insertion in model container [2021-11-07 00:55:39,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:55:39" (1/1) ... [2021-11-07 00:55:39,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:55:39,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:55:39,651 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_c08092c3-835a-4bc9-bfd9-d0c155669ce9/sv-benchmarks/c/product-lines/email_spec6_product34.cil.c[11485,11498] [2021-11-07 00:55:39,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:55:39,936 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 00:55:39,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4388c0bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:39, skipping insertion in model container [2021-11-07 00:55:39,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:55:39,938 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 00:55:39,940 INFO L168 Benchmark]: Toolchain (without parser) took 722.78 ms. Allocated memory is still 130.0 MB. Free memory was 92.6 MB in the beginning and 92.7 MB in the end (delta: -71.1 kB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 00:55:39,941 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 83.9 MB. Free memory was 60.2 MB in the beginning and 60.2 MB in the end (delta: 29.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:55:39,941 INFO L168 Benchmark]: CACSL2BoogieTranslator took 718.30 ms. Allocated memory is still 130.0 MB. Free memory was 92.3 MB in the beginning and 92.7 MB in the end (delta: -405.3 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 00:55:39,943 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 83.9 MB. Free memory was 60.2 MB in the beginning and 60.2 MB in the end (delta: 29.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 718.30 ms. Allocated memory is still 130.0 MB. Free memory was 92.3 MB in the beginning and 92.7 MB in the end (delta: -405.3 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 633]: 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_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/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_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product34.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/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_c08092c3-835a-4bc9-bfd9-d0c155669ce9/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 4c8df6e468eecbce541189806946dc0233fe629a6f2a971a54d2c5d7914e97b3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:55:42,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:55:42,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:55:42,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:55:42,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:55:42,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:55:42,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:55:42,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:55:42,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:55:42,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:55:42,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:55:42,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:55:42,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:55:42,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:55:42,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:55:42,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:55:42,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:55:42,253 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:55:42,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:55:42,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:55:42,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:55:42,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:55:42,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:55:42,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:55:42,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:55:42,285 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:55:42,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:55:42,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:55:42,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:55:42,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:55:42,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:55:42,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:55:42,293 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:55:42,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:55:42,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:55:42,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:55:42,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:55:42,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:55:42,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:55:42,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:55:42,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:55:42,305 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 00:55:42,349 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:55:42,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:55:42,351 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:55:42,351 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:55:42,351 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:55:42,351 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:55:42,351 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:55:42,352 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:55:42,352 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:55:42,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:55:42,354 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:55:42,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:55:42,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:55:42,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:55:42,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:55:42,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:55:42,356 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:55:42,356 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 00:55:42,356 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 00:55:42,356 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:55:42,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:55:42,357 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:55:42,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:55:42,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:55:42,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 00:55:42,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:55:42,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:55:42,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:55:42,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:55:42,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:55:42,359 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 00:55:42,359 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 00:55:42,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:55:42,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:55:42,360 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:55:42,360 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_c08092c3-835a-4bc9-bfd9-d0c155669ce9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c8df6e468eecbce541189806946dc0233fe629a6f2a971a54d2c5d7914e97b3 [2021-11-07 00:55:42,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:55:42,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:55:42,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:55:42,748 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:55:42,749 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:55:42,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec6_product34.cil.c [2021-11-07 00:55:42,809 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/data/7144ad9d8/0f89f58c760048368e6d07e8dd70e20b/FLAG5e3108e90 [2021-11-07 00:55:43,541 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:55:43,541 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/sv-benchmarks/c/product-lines/email_spec6_product34.cil.c [2021-11-07 00:55:43,583 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/data/7144ad9d8/0f89f58c760048368e6d07e8dd70e20b/FLAG5e3108e90 [2021-11-07 00:55:43,731 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/data/7144ad9d8/0f89f58c760048368e6d07e8dd70e20b [2021-11-07 00:55:43,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:55:43,736 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:55:43,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:55:43,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:55:43,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:55:43,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:55:43" (1/1) ... [2021-11-07 00:55:43,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@733a18ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:43, skipping insertion in model container [2021-11-07 00:55:43,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:55:43" (1/1) ... [2021-11-07 00:55:43,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:55:43,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:55:44,132 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_c08092c3-835a-4bc9-bfd9-d0c155669ce9/sv-benchmarks/c/product-lines/email_spec6_product34.cil.c[11485,11498] [2021-11-07 00:55:44,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:55:44,392 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 00:55:44,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:55:44,427 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_c08092c3-835a-4bc9-bfd9-d0c155669ce9/sv-benchmarks/c/product-lines/email_spec6_product34.cil.c[11485,11498] [2021-11-07 00:55:44,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:55:44,551 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:55:44,595 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_c08092c3-835a-4bc9-bfd9-d0c155669ce9/sv-benchmarks/c/product-lines/email_spec6_product34.cil.c[11485,11498] [2021-11-07 00:55:44,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:55:44,741 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:55:44,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:44 WrapperNode [2021-11-07 00:55:44,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:55:44,743 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:55:44,743 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:55:44,743 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:55:44,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:44" (1/1) ... [2021-11-07 00:55:44,824 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:44" (1/1) ... [2021-11-07 00:55:45,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:55:45,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:55:45,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:55:45,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:55:45,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:44" (1/1) ... [2021-11-07 00:55:45,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:44" (1/1) ... [2021-11-07 00:55:45,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:44" (1/1) ... [2021-11-07 00:55:45,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:44" (1/1) ... [2021-11-07 00:55:45,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:44" (1/1) ... [2021-11-07 00:55:45,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:44" (1/1) ... [2021-11-07 00:55:45,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:44" (1/1) ... [2021-11-07 00:55:45,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:55:45,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:55:45,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:55:45,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:55:45,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:44" (1/1) ... [2021-11-07 00:55:45,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:55:45,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:55:45,295 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:55:45,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:55:45,339 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 00:55:45,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:55:45,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 00:55:45,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:55:45,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:55:52,062 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:55:52,062 INFO L299 CfgBuilder]: Removed 885 assume(true) statements. [2021-11-07 00:55:52,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:55:52 BoogieIcfgContainer [2021-11-07 00:55:52,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:55:52,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:55:52,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:55:52,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:55:52,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:55:43" (1/3) ... [2021-11-07 00:55:52,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d09577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:55:52, skipping insertion in model container [2021-11-07 00:55:52,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:44" (2/3) ... [2021-11-07 00:55:52,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d09577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:55:52, skipping insertion in model container [2021-11-07 00:55:52,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:55:52" (3/3) ... [2021-11-07 00:55:52,075 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec6_product34.cil.c [2021-11-07 00:55:52,082 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:55:52,082 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 00:55:52,135 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:55:52,141 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 00:55:52,141 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 00:55:52,185 INFO L276 IsEmpty]: Start isEmpty. Operand has 1308 states, 1301 states have (on average 1.7217524980784011) internal successors, (2240), 1307 states have internal predecessors, (2240), 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 00:55:52,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 00:55:52,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:52,203 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:52,203 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 00:55:52,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:52,209 INFO L85 PathProgramCache]: Analyzing trace with hash -388254702, now seen corresponding path program 1 times [2021-11-07 00:55:52,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:55:52,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674162452] [2021-11-07 00:55:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:52,226 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:55:52,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:55:52,237 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:55:52,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 00:55:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:52,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 00:55:52,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:52,929 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 00:55:52,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:53,103 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 00:55:53,103 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:55:53,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674162452] [2021-11-07 00:55:53,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674162452] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:53,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:53,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:55:53,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195145534] [2021-11-07 00:55:53,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 00:55:53,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:55:53,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 00:55:53,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:55:53,131 INFO L87 Difference]: Start difference. First operand has 1308 states, 1301 states have (on average 1.7217524980784011) internal successors, (2240), 1307 states have internal predecessors, (2240), 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 28.5) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:53,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:53,222 INFO L93 Difference]: Finished difference Result 2331 states and 3957 transitions. [2021-11-07 00:55:53,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 00:55:53,223 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 00:55:53,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:53,248 INFO L225 Difference]: With dead ends: 2331 [2021-11-07 00:55:53,249 INFO L226 Difference]: Without dead ends: 1100 [2021-11-07 00:55:53,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 112 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 00:55:53,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-11-07 00:55:53,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1100. [2021-11-07 00:55:53,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1094 states have (on average 1.723034734917733) internal successors, (1885), 1099 states have internal predecessors, (1885), 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 00:55:53,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1885 transitions. [2021-11-07 00:55:53,352 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1885 transitions. Word has length 57 [2021-11-07 00:55:53,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:53,352 INFO L470 AbstractCegarLoop]: Abstraction has 1100 states and 1885 transitions. [2021-11-07 00:55:53,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:53,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1885 transitions. [2021-11-07 00:55:53,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 00:55:53,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:53,358 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] [2021-11-07 00:55:53,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:53,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:55:53,562 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 00:55:53,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:53,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1751404506, now seen corresponding path program 1 times [2021-11-07 00:55:53,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:55:53,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068968713] [2021-11-07 00:55:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:53,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:55:53,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:55:53,568 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:55:53,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 00:55:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:54,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:55:54,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:54,236 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 00:55:54,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:54,385 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 00:55:54,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:55:54,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068968713] [2021-11-07 00:55:54,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068968713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:54,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:54,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:55:54,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116280118] [2021-11-07 00:55:54,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:55:54,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:55:54,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:55:54,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:55:54,392 INFO L87 Difference]: Start difference. First operand 1100 states and 1885 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:54,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:54,556 INFO L93 Difference]: Finished difference Result 3270 states and 5607 transitions. [2021-11-07 00:55:54,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:55:54,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 00:55:54,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:54,571 INFO L225 Difference]: With dead ends: 3270 [2021-11-07 00:55:54,572 INFO L226 Difference]: Without dead ends: 2185 [2021-11-07 00:55:54,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 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 00:55:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-11-07 00:55:54,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 1099. [2021-11-07 00:55:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1093 states have (on average 1.7200365965233302) internal successors, (1880), 1098 states have internal predecessors, (1880), 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 00:55:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1880 transitions. [2021-11-07 00:55:54,636 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1880 transitions. Word has length 58 [2021-11-07 00:55:54,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:54,637 INFO L470 AbstractCegarLoop]: Abstraction has 1099 states and 1880 transitions. [2021-11-07 00:55:54,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:54,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1880 transitions. [2021-11-07 00:55:54,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 00:55:54,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:54,640 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] [2021-11-07 00:55:54,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:54,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:55:54,855 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 00:55:54,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:54,856 INFO L85 PathProgramCache]: Analyzing trace with hash 979640116, now seen corresponding path program 1 times [2021-11-07 00:55:54,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:55:54,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516284165] [2021-11-07 00:55:54,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:54,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:55:54,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:55:54,858 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:55:54,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 00:55:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:55,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:55:55,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:55,534 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 00:55:55,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:55,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:55:55,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516284165] [2021-11-07 00:55:55,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516284165] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:55,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:55,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:55:55,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971574539] [2021-11-07 00:55:55,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:55:55,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:55:55,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:55:55,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:55:55,720 INFO L87 Difference]: Start difference. First operand 1099 states and 1880 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 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 00:55:56,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:56,091 INFO L93 Difference]: Finished difference Result 4313 states and 7382 transitions. [2021-11-07 00:55:56,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:55:56,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 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 60 [2021-11-07 00:55:56,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:56,113 INFO L225 Difference]: With dead ends: 4313 [2021-11-07 00:55:56,113 INFO L226 Difference]: Without dead ends: 3232 [2021-11-07 00:55:56,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 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 00:55:56,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-11-07 00:55:56,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 1098. [2021-11-07 00:55:56,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1092 states have (on average 1.7179487179487178) internal successors, (1876), 1097 states have internal predecessors, (1876), 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 00:55:56,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1876 transitions. [2021-11-07 00:55:56,235 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1876 transitions. Word has length 60 [2021-11-07 00:55:56,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:56,235 INFO L470 AbstractCegarLoop]: Abstraction has 1098 states and 1876 transitions. [2021-11-07 00:55:56,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 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 00:55:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1876 transitions. [2021-11-07 00:55:56,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 00:55:56,237 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:56,237 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:56,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:56,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:55:56,457 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 00:55:56,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:56,457 INFO L85 PathProgramCache]: Analyzing trace with hash -929185535, now seen corresponding path program 1 times [2021-11-07 00:55:56,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:55:56,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695546807] [2021-11-07 00:55:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:56,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:55:56,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:55:56,460 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:55:56,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 00:55:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:56,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:55:56,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:57,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:57,240 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:55:57,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695546807] [2021-11-07 00:55:57,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695546807] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:57,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:57,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:55:57,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175487186] [2021-11-07 00:55:57,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:55:57,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:55:57,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:55:57,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:55:57,243 INFO L87 Difference]: Start difference. First operand 1098 states and 1876 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 00:55:57,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:57,356 INFO L93 Difference]: Finished difference Result 2193 states and 3749 transitions. [2021-11-07 00:55:57,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:55:57,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 61 [2021-11-07 00:55:57,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:57,364 INFO L225 Difference]: With dead ends: 2193 [2021-11-07 00:55:57,365 INFO L226 Difference]: Without dead ends: 1103 [2021-11-07 00:55:57,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 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 00:55:57,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-11-07 00:55:57,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1098. [2021-11-07 00:55:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1092 states have (on average 1.715201465201465) internal successors, (1873), 1097 states have internal predecessors, (1873), 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 00:55:57,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1873 transitions. [2021-11-07 00:55:57,438 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1873 transitions. Word has length 61 [2021-11-07 00:55:57,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:57,440 INFO L470 AbstractCegarLoop]: Abstraction has 1098 states and 1873 transitions. [2021-11-07 00:55:57,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 00:55:57,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1873 transitions. [2021-11-07 00:55:57,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 00:55:57,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:57,443 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] [2021-11-07 00:55:57,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:57,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:55:57,658 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 00:55:57,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:57,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1846962508, now seen corresponding path program 1 times [2021-11-07 00:55:57,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:55:57,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973362935] [2021-11-07 00:55:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:57,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:55:57,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:55:57,661 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:55:57,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 00:55:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:58,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:55:58,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:58,363 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 00:55:58,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:58,525 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 00:55:58,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:55:58,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973362935] [2021-11-07 00:55:58,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973362935] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:58,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:58,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:55:58,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459164553] [2021-11-07 00:55:58,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:55:58,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:55:58,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:55:58,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:55:58,528 INFO L87 Difference]: Start difference. First operand 1098 states and 1873 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 00:55:58,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:58,922 INFO L93 Difference]: Finished difference Result 4300 states and 7358 transitions. [2021-11-07 00:55:58,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:55:58,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 62 [2021-11-07 00:55:58,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:58,943 INFO L225 Difference]: With dead ends: 4300 [2021-11-07 00:55:58,944 INFO L226 Difference]: Without dead ends: 3228 [2021-11-07 00:55:58,947 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 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 00:55:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-11-07 00:55:59,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 1098. [2021-11-07 00:55:59,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1092 states have (on average 1.7124542124542124) internal successors, (1870), 1097 states have internal predecessors, (1870), 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 00:55:59,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1870 transitions. [2021-11-07 00:55:59,089 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1870 transitions. Word has length 62 [2021-11-07 00:55:59,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:59,089 INFO L470 AbstractCegarLoop]: Abstraction has 1098 states and 1870 transitions. [2021-11-07 00:55:59,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 00:55:59,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1870 transitions. [2021-11-07 00:55:59,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 00:55:59,092 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:59,092 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 00:55:59,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 00:55:59,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:55:59,310 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 00:55:59,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:59,311 INFO L85 PathProgramCache]: Analyzing trace with hash -750828879, now seen corresponding path program 1 times [2021-11-07 00:55:59,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:55:59,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543763466] [2021-11-07 00:55:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:59,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:55:59,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:55:59,313 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:55:59,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 00:55:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:59,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:55:59,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:59,925 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 00:55:59,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:00,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:00,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543763466] [2021-11-07 00:56:00,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543763466] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:00,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:00,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:56:00,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87343475] [2021-11-07 00:56:00,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:56:00,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:00,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:56:00,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:56:00,073 INFO L87 Difference]: Start difference. First operand 1098 states and 1870 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 00:56:00,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:00,264 INFO L93 Difference]: Finished difference Result 2985 states and 5075 transitions. [2021-11-07 00:56:00,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:56:00,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 64 [2021-11-07 00:56:00,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:00,279 INFO L225 Difference]: With dead ends: 2985 [2021-11-07 00:56:00,279 INFO L226 Difference]: Without dead ends: 2170 [2021-11-07 00:56:00,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 124 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 00:56:00,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-11-07 00:56:00,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1355. [2021-11-07 00:56:00,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1349 states have (on average 1.736842105263158) internal successors, (2343), 1354 states have internal predecessors, (2343), 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 00:56:00,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 2343 transitions. [2021-11-07 00:56:00,418 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 2343 transitions. Word has length 64 [2021-11-07 00:56:00,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:00,418 INFO L470 AbstractCegarLoop]: Abstraction has 1355 states and 2343 transitions. [2021-11-07 00:56:00,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 00:56:00,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 2343 transitions. [2021-11-07 00:56:00,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 00:56:00,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:00,421 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:00,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:00,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:00,637 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 00:56:00,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:00,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1452841024, now seen corresponding path program 1 times [2021-11-07 00:56:00,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:00,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972897966] [2021-11-07 00:56:00,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:00,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:00,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:00,640 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:00,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 00:56:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:01,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:56:01,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:01,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:01,528 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 00:56:01,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:01,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972897966] [2021-11-07 00:56:01,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972897966] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:01,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:01,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:56:01,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940697687] [2021-11-07 00:56:01,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:01,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:01,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:01,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:01,531 INFO L87 Difference]: Start difference. First operand 1355 states and 2343 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:01,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:01,715 INFO L93 Difference]: Finished difference Result 3646 states and 6295 transitions. [2021-11-07 00:56:01,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:01,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 00:56:01,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:01,731 INFO L225 Difference]: With dead ends: 3646 [2021-11-07 00:56:01,731 INFO L226 Difference]: Without dead ends: 2375 [2021-11-07 00:56:01,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:01,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-11-07 00:56:01,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1560. [2021-11-07 00:56:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1554 states have (on average 1.7496782496782497) internal successors, (2719), 1559 states have internal predecessors, (2719), 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 00:56:01,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 2719 transitions. [2021-11-07 00:56:01,888 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 2719 transitions. Word has length 76 [2021-11-07 00:56:01,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:01,889 INFO L470 AbstractCegarLoop]: Abstraction has 1560 states and 2719 transitions. [2021-11-07 00:56:01,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 2719 transitions. [2021-11-07 00:56:01,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 00:56:01,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:01,892 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:01,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:02,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:02,114 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 00:56:02,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:02,114 INFO L85 PathProgramCache]: Analyzing trace with hash -874918335, now seen corresponding path program 1 times [2021-11-07 00:56:02,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:02,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866176706] [2021-11-07 00:56:02,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:02,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:02,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:02,116 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:02,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 00:56:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:02,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:56:02,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:02,842 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 00:56:02,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:03,024 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 00:56:03,024 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:03,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866176706] [2021-11-07 00:56:03,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866176706] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:03,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:03,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:56:03,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674468690] [2021-11-07 00:56:03,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:03,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:03,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:03,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:03,027 INFO L87 Difference]: Start difference. First operand 1560 states and 2719 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:03,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:03,233 INFO L93 Difference]: Finished difference Result 4305 states and 7509 transitions. [2021-11-07 00:56:03,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:03,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 00:56:03,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:03,251 INFO L225 Difference]: With dead ends: 4305 [2021-11-07 00:56:03,251 INFO L226 Difference]: Without dead ends: 2833 [2021-11-07 00:56:03,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:03,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-11-07 00:56:03,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2018. [2021-11-07 00:56:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2012 states have (on average 1.7698807157057654) internal successors, (3561), 2017 states have internal predecessors, (3561), 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 00:56:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 3561 transitions. [2021-11-07 00:56:03,437 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 3561 transitions. Word has length 77 [2021-11-07 00:56:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:03,438 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 3561 transitions. [2021-11-07 00:56:03,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:03,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 3561 transitions. [2021-11-07 00:56:03,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 00:56:03,444 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:03,444 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:03,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:03,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:03,660 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 00:56:03,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:03,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1474557615, now seen corresponding path program 1 times [2021-11-07 00:56:03,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:03,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072153290] [2021-11-07 00:56:03,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:03,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:03,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:03,662 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:03,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 00:56:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:04,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:56:04,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:04,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:04,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:04,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072153290] [2021-11-07 00:56:04,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072153290] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:04,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:04,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:56:04,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473402710] [2021-11-07 00:56:04,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:56:04,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:04,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:56:04,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:56:04,552 INFO L87 Difference]: Start difference. First operand 2018 states and 3561 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 00:56:04,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:04,785 INFO L93 Difference]: Finished difference Result 4562 states and 7979 transitions. [2021-11-07 00:56:04,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:04,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 00:56:04,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:04,802 INFO L225 Difference]: With dead ends: 4562 [2021-11-07 00:56:04,802 INFO L226 Difference]: Without dead ends: 2833 [2021-11-07 00:56:04,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 152 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 00:56:04,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-11-07 00:56:04,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2018. [2021-11-07 00:56:04,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2012 states have (on average 1.7688866799204772) internal successors, (3559), 2017 states have internal predecessors, (3559), 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 00:56:04,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 3559 transitions. [2021-11-07 00:56:04,947 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 3559 transitions. Word has length 78 [2021-11-07 00:56:04,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:04,948 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 3559 transitions. [2021-11-07 00:56:04,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 00:56:04,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 3559 transitions. [2021-11-07 00:56:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 00:56:04,952 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:04,952 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:04,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:05,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:05,171 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 00:56:05,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:05,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1668314706, now seen corresponding path program 1 times [2021-11-07 00:56:05,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:05,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656680431] [2021-11-07 00:56:05,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:05,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:05,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:05,173 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:05,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 00:56:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:05,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:56:05,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:05,894 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 00:56:05,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:06,046 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 00:56:06,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:06,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656680431] [2021-11-07 00:56:06,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656680431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:06,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:06,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:56:06,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401379121] [2021-11-07 00:56:06,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:06,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:06,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:06,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:06,049 INFO L87 Difference]: Start difference. First operand 2018 states and 3559 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:06,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:06,368 INFO L93 Difference]: Finished difference Result 5651 states and 9984 transitions. [2021-11-07 00:56:06,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:06,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 00:56:06,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:06,393 INFO L225 Difference]: With dead ends: 5651 [2021-11-07 00:56:06,393 INFO L226 Difference]: Without dead ends: 3729 [2021-11-07 00:56:06,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:06,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2021-11-07 00:56:06,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 2914. [2021-11-07 00:56:06,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2914 states, 2908 states have (on average 1.7902338376891334) internal successors, (5206), 2913 states have internal predecessors, (5206), 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 00:56:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2914 states to 2914 states and 5206 transitions. [2021-11-07 00:56:06,598 INFO L78 Accepts]: Start accepts. Automaton has 2914 states and 5206 transitions. Word has length 78 [2021-11-07 00:56:06,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:06,598 INFO L470 AbstractCegarLoop]: Abstraction has 2914 states and 5206 transitions. [2021-11-07 00:56:06,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:06,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2914 states and 5206 transitions. [2021-11-07 00:56:06,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 00:56:06,604 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:06,604 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:06,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:06,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:06,819 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 00:56:06,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:06,819 INFO L85 PathProgramCache]: Analyzing trace with hash -283665729, now seen corresponding path program 1 times [2021-11-07 00:56:06,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:06,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457536244] [2021-11-07 00:56:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:06,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:06,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:06,821 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:06,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 00:56:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:07,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:56:07,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:07,568 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 00:56:07,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:07,770 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 00:56:07,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:07,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457536244] [2021-11-07 00:56:07,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457536244] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:07,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:07,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:56:07,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305244132] [2021-11-07 00:56:07,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:07,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:07,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:07,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:07,772 INFO L87 Difference]: Start difference. First operand 2914 states and 5206 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:08,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:08,091 INFO L93 Difference]: Finished difference Result 8075 states and 14444 transitions. [2021-11-07 00:56:08,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:08,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 00:56:08,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:08,121 INFO L225 Difference]: With dead ends: 8075 [2021-11-07 00:56:08,121 INFO L226 Difference]: Without dead ends: 5291 [2021-11-07 00:56:08,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:08,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2021-11-07 00:56:08,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 4476. [2021-11-07 00:56:08,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4476 states, 4470 states have (on average 1.8064876957494407) internal successors, (8075), 4475 states have internal predecessors, (8075), 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 00:56:08,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 8075 transitions. [2021-11-07 00:56:08,475 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 8075 transitions. Word has length 79 [2021-11-07 00:56:08,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:08,477 INFO L470 AbstractCegarLoop]: Abstraction has 4476 states and 8075 transitions. [2021-11-07 00:56:08,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:08,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 8075 transitions. [2021-11-07 00:56:08,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 00:56:08,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:08,488 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:08,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:08,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:08,703 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 00:56:08,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:08,704 INFO L85 PathProgramCache]: Analyzing trace with hash -89884319, now seen corresponding path program 1 times [2021-11-07 00:56:08,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:08,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174619605] [2021-11-07 00:56:08,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:08,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:08,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:08,705 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:08,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 00:56:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:09,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:56:09,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:09,475 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 00:56:09,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:09,669 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 00:56:09,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:09,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174619605] [2021-11-07 00:56:09,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174619605] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:09,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:09,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:56:09,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387107979] [2021-11-07 00:56:09,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:09,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:09,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:09,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:09,671 INFO L87 Difference]: Start difference. First operand 4476 states and 8075 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 00:56:10,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:10,033 INFO L93 Difference]: Finished difference Result 12477 states and 22534 transitions. [2021-11-07 00:56:10,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:10,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 80 [2021-11-07 00:56:10,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:10,056 INFO L225 Difference]: With dead ends: 12477 [2021-11-07 00:56:10,056 INFO L226 Difference]: Without dead ends: 8165 [2021-11-07 00:56:10,063 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 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 00:56:10,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8165 states. [2021-11-07 00:56:10,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8165 to 7350. [2021-11-07 00:56:10,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7350 states, 7344 states have (on average 1.8175381263616557) internal successors, (13348), 7349 states have internal predecessors, (13348), 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 00:56:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7350 states to 7350 states and 13348 transitions. [2021-11-07 00:56:10,559 INFO L78 Accepts]: Start accepts. Automaton has 7350 states and 13348 transitions. Word has length 80 [2021-11-07 00:56:10,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:10,559 INFO L470 AbstractCegarLoop]: Abstraction has 7350 states and 13348 transitions. [2021-11-07 00:56:10,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 00:56:10,559 INFO L276 IsEmpty]: Start isEmpty. Operand 7350 states and 13348 transitions. [2021-11-07 00:56:10,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 00:56:10,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:10,570 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:10,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:10,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:10,785 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 00:56:10,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:10,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1356712835, now seen corresponding path program 1 times [2021-11-07 00:56:10,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:10,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052413058] [2021-11-07 00:56:10,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:10,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:10,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:10,788 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:10,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 00:56:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:11,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:56:11,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:11,612 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 00:56:11,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:11,836 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 00:56:11,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:11,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052413058] [2021-11-07 00:56:11,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052413058] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:11,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:11,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:56:11,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789466709] [2021-11-07 00:56:11,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:56:11,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:11,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:56:11,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:56:11,838 INFO L87 Difference]: Start difference. First operand 7350 states and 13348 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 00:56:15,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:15,114 INFO L93 Difference]: Finished difference Result 27911 states and 50727 transitions. [2021-11-07 00:56:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 00:56:15,114 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 81 [2021-11-07 00:56:15,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:15,165 INFO L225 Difference]: With dead ends: 27911 [2021-11-07 00:56:15,165 INFO L226 Difference]: Without dead ends: 20848 [2021-11-07 00:56:15,177 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 156 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 00:56:15,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20848 states. [2021-11-07 00:56:15,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20848 to 7300. [2021-11-07 00:56:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7300 states, 7294 states have (on average 1.802577460926789) internal successors, (13148), 7299 states have internal predecessors, (13148), 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 00:56:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7300 states to 7300 states and 13148 transitions. [2021-11-07 00:56:15,677 INFO L78 Accepts]: Start accepts. Automaton has 7300 states and 13148 transitions. Word has length 81 [2021-11-07 00:56:15,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:15,677 INFO L470 AbstractCegarLoop]: Abstraction has 7300 states and 13148 transitions. [2021-11-07 00:56:15,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 00:56:15,678 INFO L276 IsEmpty]: Start isEmpty. Operand 7300 states and 13148 transitions. [2021-11-07 00:56:15,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 00:56:15,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:15,688 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:15,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 00:56:15,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:15,926 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 00:56:15,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:15,926 INFO L85 PathProgramCache]: Analyzing trace with hash -652811346, now seen corresponding path program 1 times [2021-11-07 00:56:15,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:15,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394289447] [2021-11-07 00:56:15,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:15,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:15,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:15,929 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:15,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 00:56:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:16,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:56:16,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:16,851 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 00:56:16,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:17,022 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 00:56:17,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:17,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394289447] [2021-11-07 00:56:17,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394289447] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:17,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:17,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:56:17,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723645144] [2021-11-07 00:56:17,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:17,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:17,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:17,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:17,024 INFO L87 Difference]: Start difference. First operand 7300 states and 13148 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 00:56:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:17,613 INFO L93 Difference]: Finished difference Result 21278 states and 38376 transitions. [2021-11-07 00:56:17,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:17,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 81 [2021-11-07 00:56:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:17,643 INFO L225 Difference]: With dead ends: 21278 [2021-11-07 00:56:17,643 INFO L226 Difference]: Without dead ends: 14149 [2021-11-07 00:56:17,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 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 00:56:17,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14149 states. [2021-11-07 00:56:18,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14149 to 13334. [2021-11-07 00:56:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13334 states, 13328 states have (on average 1.8088985594237694) internal successors, (24109), 13333 states have internal predecessors, (24109), 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 00:56:18,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13334 states to 13334 states and 24109 transitions. [2021-11-07 00:56:18,358 INFO L78 Accepts]: Start accepts. Automaton has 13334 states and 24109 transitions. Word has length 81 [2021-11-07 00:56:18,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:18,359 INFO L470 AbstractCegarLoop]: Abstraction has 13334 states and 24109 transitions. [2021-11-07 00:56:18,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 00:56:18,359 INFO L276 IsEmpty]: Start isEmpty. Operand 13334 states and 24109 transitions. [2021-11-07 00:56:18,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 00:56:18,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:18,371 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:18,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:18,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:18,586 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 00:56:18,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:18,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1053202462, now seen corresponding path program 1 times [2021-11-07 00:56:18,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:18,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864437808] [2021-11-07 00:56:18,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:18,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:18,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:18,588 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:18,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 00:56:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:19,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:56:19,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:19,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:19,736 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:19,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864437808] [2021-11-07 00:56:19,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864437808] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:56:19,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2075125638] [2021-11-07 00:56:19,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:19,737 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:56:19,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:56:19,740 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:56:19,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 00:56:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:20,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:56:20,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 00:56:20,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 00:56:21,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2075125638] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:21,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:56:21,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 00:56:21,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573678989] [2021-11-07 00:56:21,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 00:56:21,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:21,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 00:56:21,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 00:56:21,237 INFO L87 Difference]: Start difference. First operand 13334 states and 24109 transitions. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 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 00:56:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:31,471 INFO L93 Difference]: Finished difference Result 90366 states and 162273 transitions. [2021-11-07 00:56:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 00:56:31,472 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 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 82 [2021-11-07 00:56:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:31,621 INFO L225 Difference]: With dead ends: 90366 [2021-11-07 00:56:31,621 INFO L226 Difference]: Without dead ends: 89569 [2021-11-07 00:56:31,639 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 00:56:31,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89569 states. [2021-11-07 00:56:33,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89569 to 26356. [2021-11-07 00:56:33,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26356 states, 26350 states have (on average 1.8102846299810247) internal successors, (47701), 26355 states have internal predecessors, (47701), 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 00:56:33,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26356 states to 26356 states and 47701 transitions. [2021-11-07 00:56:33,974 INFO L78 Accepts]: Start accepts. Automaton has 26356 states and 47701 transitions. Word has length 82 [2021-11-07 00:56:33,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:33,975 INFO L470 AbstractCegarLoop]: Abstraction has 26356 states and 47701 transitions. [2021-11-07 00:56:33,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 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 00:56:33,975 INFO L276 IsEmpty]: Start isEmpty. Operand 26356 states and 47701 transitions. [2021-11-07 00:56:34,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 00:56:34,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:34,008 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:34,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:34,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-07 00:56:34,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:56:34,428 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 00:56:34,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:34,428 INFO L85 PathProgramCache]: Analyzing trace with hash 295547218, now seen corresponding path program 1 times [2021-11-07 00:56:34,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:34,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450928424] [2021-11-07 00:56:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:34,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:34,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:34,430 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:34,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 00:56:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:35,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:56:35,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:35,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:35,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:35,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450928424] [2021-11-07 00:56:35,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450928424] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:56:35,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [651987901] [2021-11-07 00:56:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:35,718 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:56:35,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:56:35,719 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:56:35,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 00:56:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:36,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 00:56:36,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 00:56:37,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 00:56:37,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [651987901] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:37,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:56:37,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 00:56:37,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913988913] [2021-11-07 00:56:37,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:56:37,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:37,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:56:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 00:56:37,302 INFO L87 Difference]: Start difference. First operand 26356 states and 47701 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:41,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:41,043 INFO L93 Difference]: Finished difference Result 28706 states and 51616 transitions. [2021-11-07 00:56:41,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:56:41,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 00:56:41,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:41,088 INFO L225 Difference]: With dead ends: 28706 [2021-11-07 00:56:41,090 INFO L226 Difference]: Without dead ends: 27396 [2021-11-07 00:56:41,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 00:56:41,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27396 states. [2021-11-07 00:56:42,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27396 to 26350. [2021-11-07 00:56:42,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26350 states, 26344 states have (on average 1.8102034618888552) internal successors, (47688), 26349 states have internal predecessors, (47688), 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 00:56:42,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26350 states to 26350 states and 47688 transitions. [2021-11-07 00:56:42,718 INFO L78 Accepts]: Start accepts. Automaton has 26350 states and 47688 transitions. Word has length 83 [2021-11-07 00:56:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:42,718 INFO L470 AbstractCegarLoop]: Abstraction has 26350 states and 47688 transitions. [2021-11-07 00:56:42,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:42,718 INFO L276 IsEmpty]: Start isEmpty. Operand 26350 states and 47688 transitions. [2021-11-07 00:56:42,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 00:56:42,738 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:42,738 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:42,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:42,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:43,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:56:43,139 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 00:56:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:43,139 INFO L85 PathProgramCache]: Analyzing trace with hash -692860209, now seen corresponding path program 1 times [2021-11-07 00:56:43,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:43,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512244118] [2021-11-07 00:56:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:43,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:43,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:43,141 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:43,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 00:56:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:43,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:56:43,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 00:56:44,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 00:56:44,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:44,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512244118] [2021-11-07 00:56:44,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512244118] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:44,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:44,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 00:56:44,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355846642] [2021-11-07 00:56:44,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:56:44,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:44,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:56:44,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:56:44,405 INFO L87 Difference]: Start difference. First operand 26350 states and 47688 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:46,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:46,168 INFO L93 Difference]: Finished difference Result 51954 states and 94224 transitions. [2021-11-07 00:56:46,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:56:46,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 00:56:46,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:46,206 INFO L225 Difference]: With dead ends: 51954 [2021-11-07 00:56:46,207 INFO L226 Difference]: Without dead ends: 25894 [2021-11-07 00:56:46,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:56:46,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25894 states. [2021-11-07 00:56:46,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25894 to 13332. [2021-11-07 00:56:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13332 states, 13326 states have (on average 1.8084946720696382) internal successors, (24100), 13331 states have internal predecessors, (24100), 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 00:56:46,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13332 states to 13332 states and 24100 transitions. [2021-11-07 00:56:46,940 INFO L78 Accepts]: Start accepts. Automaton has 13332 states and 24100 transitions. Word has length 83 [2021-11-07 00:56:46,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:46,941 INFO L470 AbstractCegarLoop]: Abstraction has 13332 states and 24100 transitions. [2021-11-07 00:56:46,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:46,941 INFO L276 IsEmpty]: Start isEmpty. Operand 13332 states and 24100 transitions. [2021-11-07 00:56:46,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 00:56:46,955 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:46,956 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:46,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:47,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:47,172 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 00:56:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:47,172 INFO L85 PathProgramCache]: Analyzing trace with hash -365276092, now seen corresponding path program 1 times [2021-11-07 00:56:47,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:47,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41739373] [2021-11-07 00:56:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:47,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:47,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:47,174 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:47,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 00:56:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:48,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:56:48,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:48,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:48,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:48,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41739373] [2021-11-07 00:56:48,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41739373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:56:48,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [197991366] [2021-11-07 00:56:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:48,558 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:56:48,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:56:48,559 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:56:48,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 00:56:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:49,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 00:56:49,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:50,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 00:56:50,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 00:56:50,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [197991366] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:50,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:56:50,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 00:56:50,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335693055] [2021-11-07 00:56:50,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 00:56:50,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:50,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 00:56:50,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 00:56:50,916 INFO L87 Difference]: Start difference. First operand 13332 states and 24100 transitions. Second operand has 16 states, 16 states have (on average 8.5625) internal successors, (137), 15 states have internal predecessors, (137), 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 00:57:16,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:16,996 INFO L93 Difference]: Finished difference Result 36527 states and 64300 transitions. [2021-11-07 00:57:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 00:57:16,997 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.5625) internal successors, (137), 15 states have internal predecessors, (137), 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 85 [2021-11-07 00:57:16,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:17,055 INFO L225 Difference]: With dead ends: 36527 [2021-11-07 00:57:17,056 INFO L226 Difference]: Without dead ends: 35778 [2021-11-07 00:57:17,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1073, Invalid=3483, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 00:57:17,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35778 states. [2021-11-07 00:57:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35778 to 27023. [2021-11-07 00:57:18,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27023 states, 27017 states have (on average 1.8068623459303401) internal successors, (48816), 27022 states have internal predecessors, (48816), 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 00:57:18,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27023 states to 27023 states and 48816 transitions. [2021-11-07 00:57:18,648 INFO L78 Accepts]: Start accepts. Automaton has 27023 states and 48816 transitions. Word has length 85 [2021-11-07 00:57:18,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:18,648 INFO L470 AbstractCegarLoop]: Abstraction has 27023 states and 48816 transitions. [2021-11-07 00:57:18,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.5625) internal successors, (137), 15 states have internal predecessors, (137), 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 00:57:18,648 INFO L276 IsEmpty]: Start isEmpty. Operand 27023 states and 48816 transitions. [2021-11-07 00:57:18,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 00:57:18,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:18,667 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:18,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:18,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:19,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:19,068 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:57:19,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:19,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1138150879, now seen corresponding path program 1 times [2021-11-07 00:57:19,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:19,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918276008] [2021-11-07 00:57:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:19,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:19,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:19,070 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:19,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 00:57:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:20,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:57:20,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:20,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:20,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:20,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918276008] [2021-11-07 00:57:20,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918276008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:57:20,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2064050543] [2021-11-07 00:57:20,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:20,479 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:20,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:57:20,490 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:57:20,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 00:57:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:21,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 00:57:21,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 00:57:22,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 00:57:22,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2064050543] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:22,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:57:22,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 00:57:22,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515365057] [2021-11-07 00:57:22,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:57:22,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:22,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:57:22,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 00:57:22,369 INFO L87 Difference]: Start difference. First operand 27023 states and 48816 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 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 00:57:26,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:26,466 INFO L93 Difference]: Finished difference Result 30163 states and 54013 transitions. [2021-11-07 00:57:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 00:57:26,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 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 86 [2021-11-07 00:57:26,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:26,503 INFO L225 Difference]: With dead ends: 30163 [2021-11-07 00:57:26,503 INFO L226 Difference]: Without dead ends: 28127 [2021-11-07 00:57:26,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-07 00:57:26,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28127 states. [2021-11-07 00:57:27,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28127 to 26969. [2021-11-07 00:57:28,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26969 states, 26963 states have (on average 1.8060304862218597) internal successors, (48696), 26968 states have internal predecessors, (48696), 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 00:57:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26969 states to 26969 states and 48696 transitions. [2021-11-07 00:57:28,050 INFO L78 Accepts]: Start accepts. Automaton has 26969 states and 48696 transitions. Word has length 86 [2021-11-07 00:57:28,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:28,050 INFO L470 AbstractCegarLoop]: Abstraction has 26969 states and 48696 transitions. [2021-11-07 00:57:28,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 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 00:57:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 26969 states and 48696 transitions. [2021-11-07 00:57:28,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 00:57:28,063 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:28,064 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:28,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:28,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:28,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:28,464 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:57:28,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:28,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1374647559, now seen corresponding path program 1 times [2021-11-07 00:57:28,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:28,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927896863] [2021-11-07 00:57:28,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:28,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:28,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:28,467 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:28,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 00:57:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:29,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:57:29,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:29,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:29,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:29,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927896863] [2021-11-07 00:57:29,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927896863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:57:29,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [212076818] [2021-11-07 00:57:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:29,933 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:29,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:57:29,942 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:57:29,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 00:57:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:31,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 00:57:31,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 00:57:32,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 00:57:32,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [212076818] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:32,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:57:32,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 00:57:32,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306138647] [2021-11-07 00:57:32,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 00:57:32,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:32,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 00:57:32,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 00:57:32,461 INFO L87 Difference]: Start difference. First operand 26969 states and 48696 transitions. Second operand has 16 states, 16 states have (on average 8.6875) internal successors, (139), 15 states have internal predecessors, (139), 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 00:58:00,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:00,622 INFO L93 Difference]: Finished difference Result 72098 states and 127151 transitions. [2021-11-07 00:58:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 00:58:00,623 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.6875) internal successors, (139), 15 states have internal predecessors, (139), 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 86 [2021-11-07 00:58:00,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:00,719 INFO L225 Difference]: With dead ends: 72098 [2021-11-07 00:58:00,719 INFO L226 Difference]: Without dead ends: 70404 [2021-11-07 00:58:00,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1073, Invalid=3483, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 00:58:00,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70404 states. [2021-11-07 00:58:04,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70404 to 54205. [2021-11-07 00:58:04,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54205 states, 54199 states have (on average 1.8051071052971457) internal successors, (97835), 54204 states have internal predecessors, (97835), 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 00:58:04,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54205 states to 54205 states and 97835 transitions. [2021-11-07 00:58:04,253 INFO L78 Accepts]: Start accepts. Automaton has 54205 states and 97835 transitions. Word has length 86 [2021-11-07 00:58:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:04,254 INFO L470 AbstractCegarLoop]: Abstraction has 54205 states and 97835 transitions. [2021-11-07 00:58:04,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.6875) internal successors, (139), 15 states have internal predecessors, (139), 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 00:58:04,254 INFO L276 IsEmpty]: Start isEmpty. Operand 54205 states and 97835 transitions. [2021-11-07 00:58:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 00:58:04,275 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:04,276 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:04,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:04,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-07 00:58:04,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:04,676 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:58:04,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:04,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1155792841, now seen corresponding path program 1 times [2021-11-07 00:58:04,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:04,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312540119] [2021-11-07 00:58:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:04,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:04,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:04,679 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:04,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 00:58:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:05,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:58:05,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:06,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:06,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:06,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312540119] [2021-11-07 00:58:06,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312540119] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:06,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [657591983] [2021-11-07 00:58:06,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:06,488 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:06,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:58:06,489 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:58:06,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 00:58:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:08,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:58:08,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 00:58:08,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 00:58:08,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [657591983] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:08,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:58:08,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 14 [2021-11-07 00:58:08,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879986582] [2021-11-07 00:58:08,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:58:08,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:08,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:58:08,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 00:58:08,680 INFO L87 Difference]: Start difference. First operand 54205 states and 97835 transitions. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:21,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:21,340 INFO L93 Difference]: Finished difference Result 97793 states and 170207 transitions. [2021-11-07 00:58:21,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 00:58:21,340 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 00:58:21,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:21,474 INFO L225 Difference]: With dead ends: 97793 [2021-11-07 00:58:21,474 INFO L226 Difference]: Without dead ends: 93617 [2021-11-07 00:58:21,490 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-11-07 00:58:21,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93617 states. [2021-11-07 00:58:26,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93617 to 58861. [2021-11-07 00:58:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58861 states, 58855 states have (on average 1.7926599269390875) internal successors, (105507), 58860 states have internal predecessors, (105507), 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 00:58:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58861 states to 58861 states and 105507 transitions. [2021-11-07 00:58:26,515 INFO L78 Accepts]: Start accepts. Automaton has 58861 states and 105507 transitions. Word has length 86 [2021-11-07 00:58:26,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:26,516 INFO L470 AbstractCegarLoop]: Abstraction has 58861 states and 105507 transitions. [2021-11-07 00:58:26,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 58861 states and 105507 transitions. [2021-11-07 00:58:26,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 00:58:26,546 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:26,546 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:26,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:26,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:26,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:26,964 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:58:26,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:26,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1371036118, now seen corresponding path program 1 times [2021-11-07 00:58:26,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:26,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733962518] [2021-11-07 00:58:26,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:26,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:26,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:26,966 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:26,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 00:58:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:28,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:58:28,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:28,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:28,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:28,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733962518] [2021-11-07 00:58:28,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733962518] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:28,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1431710396] [2021-11-07 00:58:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:28,765 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:28,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:58:28,766 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:58:28,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08092c3-835a-4bc9-bfd9-d0c155669ce9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 00:58:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:30,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 00:58:30,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 00:58:30,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 00:58:30,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1431710396] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:30,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:58:30,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 15 [2021-11-07 00:58:30,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867915938] [2021-11-07 00:58:30,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 00:58:30,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:30,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 00:58:30,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-07 00:58:30,926 INFO L87 Difference]: Start difference. First operand 58861 states and 105507 transitions. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 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)