./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product24.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_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/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_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/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_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/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 cc83a32f8f5c6143265231752530a7f576faa355052cdad9509cfbce0d0adeb3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:15:31,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:15:31,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:15:31,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:15:31,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:15:31,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:15:31,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:15:31,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:15:31,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:15:31,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:15:31,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:15:31,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:15:31,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:15:31,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:15:31,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:15:31,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:15:31,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:15:31,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:15:31,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:15:31,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:15:31,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:15:31,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:15:31,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:15:31,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:15:31,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:15:31,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:15:31,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:15:31,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:15:31,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:15:31,829 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:15:31,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:15:31,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:15:31,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:15:31,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:15:31,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:15:31,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:15:31,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:15:31,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:15:31,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:15:31,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:15:31,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:15:31,850 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:15:31,908 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:15:31,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:15:31,911 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:15:31,911 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:15:31,911 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:15:31,912 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:15:31,912 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:15:31,920 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:15:31,920 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:15:31,920 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:15:31,922 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:15:31,922 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:15:31,923 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:15:31,923 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:15:31,923 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:15:31,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:15:31,925 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:15:31,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:15:31,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:15:31,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:15:31,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:15:31,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:15:31,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:15:31,927 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:15:31,927 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:15:31,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:15:31,927 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:15:31,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:15:31,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:15:31,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:15:31,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:15:31,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:15:31,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:15:31,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:15:31,933 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:15:31,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:15:31,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:15:31,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:15:31,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:15:31,934 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_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc83a32f8f5c6143265231752530a7f576faa355052cdad9509cfbce0d0adeb3 [2021-11-07 02:15:32,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:15:32,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:15:32,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:15:32,369 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:15:32,370 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:15:32,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product24.cil.c [2021-11-07 02:15:32,445 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/data/0a3ffa194/04a76af44d5b4c9097fae0004a48bad2/FLAG82c0f9882 [2021-11-07 02:15:33,167 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:15:33,168 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/sv-benchmarks/c/product-lines/email_spec4_product24.cil.c [2021-11-07 02:15:33,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/data/0a3ffa194/04a76af44d5b4c9097fae0004a48bad2/FLAG82c0f9882 [2021-11-07 02:15:33,340 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/data/0a3ffa194/04a76af44d5b4c9097fae0004a48bad2 [2021-11-07 02:15:33,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:15:33,350 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:15:33,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:15:33,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:15:33,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:15:33,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:15:33" (1/1) ... [2021-11-07 02:15:33,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cd86622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:33, skipping insertion in model container [2021-11-07 02:15:33,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:15:33" (1/1) ... [2021-11-07 02:15:33,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:15:33,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:15:33,953 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_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/sv-benchmarks/c/product-lines/email_spec4_product24.cil.c[33676,33689] [2021-11-07 02:15:34,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:15:34,305 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:15:34,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7163372c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:34, skipping insertion in model container [2021-11-07 02:15:34,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:15:34,307 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:15:34,310 INFO L168 Benchmark]: Toolchain (without parser) took 958.47 ms. Allocated memory was 88.1 MB in the beginning and 121.6 MB in the end (delta: 33.6 MB). Free memory was 49.9 MB in the beginning and 85.7 MB in the end (delta: -35.8 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:15:34,312 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 88.1 MB. Free memory was 69.0 MB in the beginning and 69.0 MB in the end (delta: 36.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:15:34,315 INFO L168 Benchmark]: CACSL2BoogieTranslator took 955.20 ms. Allocated memory was 88.1 MB in the beginning and 121.6 MB in the end (delta: 33.6 MB). Free memory was 49.7 MB in the beginning and 85.7 MB in the end (delta: -36.0 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:15:34,318 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 88.1 MB. Free memory was 69.0 MB in the beginning and 69.0 MB in the end (delta: 36.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 955.20 ms. Allocated memory was 88.1 MB in the beginning and 121.6 MB in the end (delta: 33.6 MB). Free memory was 49.7 MB in the beginning and 85.7 MB in the end (delta: -36.0 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1462]: 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_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/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_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/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_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/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 cc83a32f8f5c6143265231752530a7f576faa355052cdad9509cfbce0d0adeb3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:15:37,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:15:37,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:15:37,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:15:37,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:15:37,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:15:37,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:15:37,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:15:37,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:15:37,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:15:37,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:15:37,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:15:37,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:15:37,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:15:37,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:15:37,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:15:37,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:15:37,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:15:37,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:15:37,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:15:37,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:15:37,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:15:37,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:15:37,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:15:37,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:15:37,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:15:37,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:15:37,225 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:15:37,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:15:37,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:15:37,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:15:37,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:15:37,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:15:37,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:15:37,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:15:37,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:15:37,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:15:37,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:15:37,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:15:37,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:15:37,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:15:37,242 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:15:37,303 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:15:37,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:15:37,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:15:37,305 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:15:37,305 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:15:37,306 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:15:37,306 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:15:37,306 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:15:37,306 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:15:37,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:15:37,308 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:15:37,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:15:37,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:15:37,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:15:37,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:15:37,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:15:37,310 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:15:37,310 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:15:37,310 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:15:37,311 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:15:37,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:15:37,311 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:15:37,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:15:37,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:15:37,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:15:37,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:15:37,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:15:37,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:15:37,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:15:37,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:15:37,314 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:15:37,314 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:15:37,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:15:37,315 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:15:37,315 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:15:37,316 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_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc83a32f8f5c6143265231752530a7f576faa355052cdad9509cfbce0d0adeb3 [2021-11-07 02:15:37,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:15:37,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:15:37,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:15:37,772 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:15:37,776 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:15:37,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product24.cil.c [2021-11-07 02:15:37,871 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/data/2bc7f3269/3e57d8fcfed2451d90d5da9ccf8a4659/FLAG77c6b22b4 [2021-11-07 02:15:38,772 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:15:38,776 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/sv-benchmarks/c/product-lines/email_spec4_product24.cil.c [2021-11-07 02:15:38,815 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/data/2bc7f3269/3e57d8fcfed2451d90d5da9ccf8a4659/FLAG77c6b22b4 [2021-11-07 02:15:38,882 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/data/2bc7f3269/3e57d8fcfed2451d90d5da9ccf8a4659 [2021-11-07 02:15:38,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:15:38,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:15:38,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:15:38,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:15:38,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:15:38,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:15:38" (1/1) ... [2021-11-07 02:15:38,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bf3890a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:38, skipping insertion in model container [2021-11-07 02:15:38,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:15:38" (1/1) ... [2021-11-07 02:15:38,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:15:39,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:15:39,625 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_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/sv-benchmarks/c/product-lines/email_spec4_product24.cil.c[33676,33689] [2021-11-07 02:15:39,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:15:39,865 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:15:39,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:15:40,005 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_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/sv-benchmarks/c/product-lines/email_spec4_product24.cil.c[33676,33689] [2021-11-07 02:15:40,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:15:40,124 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:15:40,211 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_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/sv-benchmarks/c/product-lines/email_spec4_product24.cil.c[33676,33689] [2021-11-07 02:15:40,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:15:40,325 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:15:40,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:40 WrapperNode [2021-11-07 02:15:40,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:15:40,328 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:15:40,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:15:40,328 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:15:40,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:40" (1/1) ... [2021-11-07 02:15:40,418 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:40" (1/1) ... [2021-11-07 02:15:40,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:15:40,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:15:40,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:15:40,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:15:40,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:40" (1/1) ... [2021-11-07 02:15:40,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:40" (1/1) ... [2021-11-07 02:15:40,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:40" (1/1) ... [2021-11-07 02:15:40,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:40" (1/1) ... [2021-11-07 02:15:40,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:40" (1/1) ... [2021-11-07 02:15:40,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:40" (1/1) ... [2021-11-07 02:15:40,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:40" (1/1) ... [2021-11-07 02:15:40,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:15:40,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:15:40,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:15:40,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:15:40,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:40" (1/1) ... [2021-11-07 02:15:40,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:15:40,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:15:40,809 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:15:40,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:15:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:15:40,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:15:40,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:15:40,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:15:40,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:15:45,922 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:15:45,922 INFO L299 CfgBuilder]: Removed 327 assume(true) statements. [2021-11-07 02:15:45,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:15:45 BoogieIcfgContainer [2021-11-07 02:15:45,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:15:45,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:15:45,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:15:45,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:15:45,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:15:38" (1/3) ... [2021-11-07 02:15:45,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@529a790b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:15:45, skipping insertion in model container [2021-11-07 02:15:45,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:40" (2/3) ... [2021-11-07 02:15:45,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@529a790b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:15:45, skipping insertion in model container [2021-11-07 02:15:45,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:15:45" (3/3) ... [2021-11-07 02:15:45,935 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_product24.cil.c [2021-11-07 02:15:45,940 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:15:45,941 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 02:15:45,995 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:15:46,002 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:15:46,002 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 02:15:46,033 INFO L276 IsEmpty]: Start isEmpty. Operand has 477 states, 474 states have (on average 1.740506329113924) internal successors, (825), 476 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:46,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 02:15:46,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:46,050 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] [2021-11-07 02:15:46,050 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:15:46,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:46,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1322552362, now seen corresponding path program 1 times [2021-11-07 02:15:46,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:46,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329726373] [2021-11-07 02:15:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:46,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:46,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:46,080 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:46,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:15:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:46,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:15:46,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:46,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:46,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:46,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329726373] [2021-11-07 02:15:46,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329726373] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:46,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:46,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:15:46,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614517147] [2021-11-07 02:15:46,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:15:46,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:46,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:15:46,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:15:46,970 INFO L87 Difference]: Start difference. First operand has 477 states, 474 states have (on average 1.740506329113924) internal successors, (825), 476 states have internal predecessors, (825), 0 states have call successors, (0), 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 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:47,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:47,037 INFO L93 Difference]: Finished difference Result 708 states and 1202 transitions. [2021-11-07 02:15:47,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:15:47,039 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-11-07 02:15:47,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:47,055 INFO L225 Difference]: With dead ends: 708 [2021-11-07 02:15:47,055 INFO L226 Difference]: Without dead ends: 395 [2021-11-07 02:15:47,060 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:15:47,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-11-07 02:15:47,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2021-11-07 02:15:47,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 393 states have (on average 1.743002544529262) internal successors, (685), 394 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 685 transitions. [2021-11-07 02:15:47,138 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 685 transitions. Word has length 40 [2021-11-07 02:15:47,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:47,139 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 685 transitions. [2021-11-07 02:15:47,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:47,139 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 685 transitions. [2021-11-07 02:15:47,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 02:15:47,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:47,144 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] [2021-11-07 02:15:47,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:47,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:47,360 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:15:47,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:47,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2011792637, now seen corresponding path program 1 times [2021-11-07 02:15:47,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:47,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340823019] [2021-11-07 02:15:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:47,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:47,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:47,367 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:47,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:15:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:47,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:15:47,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:47,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:48,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:48,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340823019] [2021-11-07 02:15:48,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340823019] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:48,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:48,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:15:48,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504420199] [2021-11-07 02:15:48,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:15:48,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:48,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:15:48,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:15:48,154 INFO L87 Difference]: Start difference. First operand 395 states and 685 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:48,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:48,353 INFO L93 Difference]: Finished difference Result 1155 states and 2007 transitions. [2021-11-07 02:15:48,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:15:48,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 41 [2021-11-07 02:15:48,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:48,362 INFO L225 Difference]: With dead ends: 1155 [2021-11-07 02:15:48,362 INFO L226 Difference]: Without dead ends: 775 [2021-11-07 02:15:48,365 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:15:48,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-11-07 02:15:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 394. [2021-11-07 02:15:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 392 states have (on average 1.7346938775510203) internal successors, (680), 393 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:48,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 680 transitions. [2021-11-07 02:15:48,408 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 680 transitions. Word has length 41 [2021-11-07 02:15:48,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:48,409 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 680 transitions. [2021-11-07 02:15:48,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:48,410 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 680 transitions. [2021-11-07 02:15:48,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 02:15:48,412 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:48,413 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] [2021-11-07 02:15:48,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:48,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:48,630 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:15:48,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:48,631 INFO L85 PathProgramCache]: Analyzing trace with hash -204086167, now seen corresponding path program 1 times [2021-11-07 02:15:48,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:48,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289232212] [2021-11-07 02:15:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:48,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:48,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:48,634 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:48,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:15:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:49,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:15:49,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:49,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:49,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:49,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289232212] [2021-11-07 02:15:49,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289232212] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:49,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:49,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:15:49,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116903272] [2021-11-07 02:15:49,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:15:49,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:49,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:15:49,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:15:49,486 INFO L87 Difference]: Start difference. First operand 394 states and 680 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:49,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:49,817 INFO L93 Difference]: Finished difference Result 1493 states and 2582 transitions. [2021-11-07 02:15:49,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:15:49,818 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 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 43 [2021-11-07 02:15:49,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:49,829 INFO L225 Difference]: With dead ends: 1493 [2021-11-07 02:15:49,829 INFO L226 Difference]: Without dead ends: 1117 [2021-11-07 02:15:49,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:15:49,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-11-07 02:15:49,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 393. [2021-11-07 02:15:49,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 391 states have (on average 1.7289002557544757) internal successors, (676), 392 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:49,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 676 transitions. [2021-11-07 02:15:49,888 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 676 transitions. Word has length 43 [2021-11-07 02:15:49,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:49,889 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 676 transitions. [2021-11-07 02:15:49,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:49,891 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 676 transitions. [2021-11-07 02:15:49,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:15:49,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:49,899 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:49,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:50,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:50,116 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:15:50,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:50,117 INFO L85 PathProgramCache]: Analyzing trace with hash -313795844, now seen corresponding path program 1 times [2021-11-07 02:15:50,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:50,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889920269] [2021-11-07 02:15:50,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:50,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:50,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:50,126 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:50,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:15:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:50,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:15:50,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:50,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:50,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:50,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889920269] [2021-11-07 02:15:50,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889920269] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:50,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:50,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:15:50,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196614712] [2021-11-07 02:15:50,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:15:50,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:50,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:15:50,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:15:50,911 INFO L87 Difference]: Start difference. First operand 393 states and 676 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:50,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:50,986 INFO L93 Difference]: Finished difference Result 783 states and 1349 transitions. [2021-11-07 02:15:50,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:15:50,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 02:15:50,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:50,990 INFO L225 Difference]: With dead ends: 783 [2021-11-07 02:15:50,991 INFO L226 Difference]: Without dead ends: 398 [2021-11-07 02:15:50,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:15:50,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-07 02:15:51,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 393. [2021-11-07 02:15:51,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 391 states have (on average 1.721227621483376) internal successors, (673), 392 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 673 transitions. [2021-11-07 02:15:51,026 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 673 transitions. Word has length 44 [2021-11-07 02:15:51,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:51,026 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 673 transitions. [2021-11-07 02:15:51,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:51,027 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 673 transitions. [2021-11-07 02:15:51,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:15:51,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:51,029 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:51,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:51,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:51,250 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:15:51,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:51,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2117650257, now seen corresponding path program 1 times [2021-11-07 02:15:51,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:51,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285964847] [2021-11-07 02:15:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:51,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:51,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:51,253 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:51,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:15:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:51,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:15:51,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:51,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:52,129 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:52,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285964847] [2021-11-07 02:15:52,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285964847] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:52,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:52,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:15:52,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630971366] [2021-11-07 02:15:52,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:15:52,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:52,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:15:52,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:15:52,133 INFO L87 Difference]: Start difference. First operand 393 states and 673 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:52,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:52,437 INFO L93 Difference]: Finished difference Result 1480 states and 2558 transitions. [2021-11-07 02:15:52,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:15:52,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 02:15:52,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:52,447 INFO L225 Difference]: With dead ends: 1480 [2021-11-07 02:15:52,448 INFO L226 Difference]: Without dead ends: 1113 [2021-11-07 02:15:52,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:15:52,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-11-07 02:15:52,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 393. [2021-11-07 02:15:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 391 states have (on average 1.7135549872122762) internal successors, (670), 392 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:52,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 670 transitions. [2021-11-07 02:15:52,495 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 670 transitions. Word has length 45 [2021-11-07 02:15:52,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:52,496 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 670 transitions. [2021-11-07 02:15:52,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:52,496 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 670 transitions. [2021-11-07 02:15:52,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 02:15:52,498 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:52,498 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:52,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:52,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:52,712 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:15:52,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:52,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1624638284, now seen corresponding path program 1 times [2021-11-07 02:15:52,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:52,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858458536] [2021-11-07 02:15:52,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:52,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:52,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:52,715 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:52,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:15:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:53,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:15:53,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:53,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:53,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:53,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858458536] [2021-11-07 02:15:53,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858458536] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:53,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:53,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:15:53,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226331692] [2021-11-07 02:15:53,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:15:53,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:53,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:15:53,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:15:53,514 INFO L87 Difference]: Start difference. First operand 393 states and 670 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:53,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:53,612 INFO L93 Difference]: Finished difference Result 909 states and 1550 transitions. [2021-11-07 02:15:53,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:15:53,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 02:15:53,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:53,618 INFO L225 Difference]: With dead ends: 909 [2021-11-07 02:15:53,619 INFO L226 Difference]: Without dead ends: 760 [2021-11-07 02:15:53,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:15:53,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-11-07 02:15:53,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 611. [2021-11-07 02:15:53,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 609 states have (on average 1.7536945812807883) internal successors, (1068), 610 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1068 transitions. [2021-11-07 02:15:53,684 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1068 transitions. Word has length 47 [2021-11-07 02:15:53,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:53,684 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 1068 transitions. [2021-11-07 02:15:53,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:53,685 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1068 transitions. [2021-11-07 02:15:53,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 02:15:53,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:53,687 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:53,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:53,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:53,910 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:15:53,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:53,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2147002179, now seen corresponding path program 1 times [2021-11-07 02:15:53,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:53,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919674149] [2021-11-07 02:15:53,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:53,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:53,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:53,913 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:53,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:15:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:54,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:15:54,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:54,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:54,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:54,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919674149] [2021-11-07 02:15:54,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919674149] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:54,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:54,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:15:54,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027651863] [2021-11-07 02:15:54,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:15:54,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:54,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:15:54,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:15:54,884 INFO L87 Difference]: Start difference. First operand 611 states and 1068 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:54,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:54,977 INFO L93 Difference]: Finished difference Result 1453 states and 2545 transitions. [2021-11-07 02:15:54,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:15:54,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 02:15:54,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:54,985 INFO L225 Difference]: With dead ends: 1453 [2021-11-07 02:15:54,985 INFO L226 Difference]: Without dead ends: 926 [2021-11-07 02:15:54,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:15:54,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-11-07 02:15:55,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 777. [2021-11-07 02:15:55,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 775 states have (on average 1.7664516129032257) internal successors, (1369), 776 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:55,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1369 transitions. [2021-11-07 02:15:55,075 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1369 transitions. Word has length 59 [2021-11-07 02:15:55,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:55,075 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 1369 transitions. [2021-11-07 02:15:55,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:55,076 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1369 transitions. [2021-11-07 02:15:55,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:15:55,078 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:55,079 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 02:15:55,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:55,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:55,292 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:15:55,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:55,293 INFO L85 PathProgramCache]: Analyzing trace with hash -42320868, now seen corresponding path program 1 times [2021-11-07 02:15:55,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:55,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516251266] [2021-11-07 02:15:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:55,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:55,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:55,295 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:55,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:15:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:55,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:15:55,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:56,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:56,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:56,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516251266] [2021-11-07 02:15:56,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516251266] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:56,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:56,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:15:56,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154932956] [2021-11-07 02:15:56,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:15:56,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:56,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:15:56,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:15:56,201 INFO L87 Difference]: Start difference. First operand 777 states and 1369 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:56,330 INFO L93 Difference]: Finished difference Result 1983 states and 3513 transitions. [2021-11-07 02:15:56,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:15:56,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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 60 [2021-11-07 02:15:56,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:56,340 INFO L225 Difference]: With dead ends: 1983 [2021-11-07 02:15:56,340 INFO L226 Difference]: Without dead ends: 1298 [2021-11-07 02:15:56,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:15:56,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-11-07 02:15:56,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1149. [2021-11-07 02:15:56,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1147 states have (on average 1.7846556233653008) internal successors, (2047), 1148 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 2047 transitions. [2021-11-07 02:15:56,484 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 2047 transitions. Word has length 60 [2021-11-07 02:15:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:56,484 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 2047 transitions. [2021-11-07 02:15:56,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 2047 transitions. [2021-11-07 02:15:56,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:15:56,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:56,489 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:56,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-07 02:15:56,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:56,707 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:15:56,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:56,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1845933077, now seen corresponding path program 1 times [2021-11-07 02:15:56,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:56,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931280760] [2021-11-07 02:15:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:56,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:56,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:56,710 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:56,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:15:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:57,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:15:57,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:57,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:57,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:57,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931280760] [2021-11-07 02:15:57,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931280760] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:57,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:57,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:15:57,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284820477] [2021-11-07 02:15:57,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:15:57,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:57,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:15:57,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:15:57,719 INFO L87 Difference]: Start difference. First operand 1149 states and 2047 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:57,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:57,942 INFO L93 Difference]: Finished difference Result 3079 states and 5516 transitions. [2021-11-07 02:15:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:15:57,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 02:15:57,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:57,959 INFO L225 Difference]: With dead ends: 3079 [2021-11-07 02:15:57,960 INFO L226 Difference]: Without dead ends: 2030 [2021-11-07 02:15:57,965 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:15:57,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2021-11-07 02:15:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 1881. [2021-11-07 02:15:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1879 states have (on average 1.7998935604044706) internal successors, (3382), 1880 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 3382 transitions. [2021-11-07 02:15:58,171 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 3382 transitions. Word has length 61 [2021-11-07 02:15:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:58,172 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 3382 transitions. [2021-11-07 02:15:58,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 3382 transitions. [2021-11-07 02:15:58,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 02:15:58,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:58,177 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 02:15:58,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:58,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:58,392 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:15:58,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:58,392 INFO L85 PathProgramCache]: Analyzing trace with hash 2060085611, now seen corresponding path program 1 times [2021-11-07 02:15:58,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:58,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400906663] [2021-11-07 02:15:58,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:58,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:58,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:58,395 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:58,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:15:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:58,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:15:58,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:59,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:59,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:59,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400906663] [2021-11-07 02:15:59,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400906663] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:59,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:59,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:15:59,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747684004] [2021-11-07 02:15:59,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:15:59,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:59,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:15:59,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:15:59,344 INFO L87 Difference]: Start difference. First operand 1881 states and 3382 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:59,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:59,627 INFO L93 Difference]: Finished difference Result 5011 states and 9040 transitions. [2021-11-07 02:15:59,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:15:59,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 02:15:59,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:59,654 INFO L225 Difference]: With dead ends: 5011 [2021-11-07 02:15:59,655 INFO L226 Difference]: Without dead ends: 3264 [2021-11-07 02:15:59,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:15:59,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3264 states. [2021-11-07 02:15:59,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3264 to 3115. [2021-11-07 02:15:59,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3115 states, 3113 states have (on average 1.8075811114680373) internal successors, (5627), 3114 states have internal predecessors, (5627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3115 states to 3115 states and 5627 transitions. [2021-11-07 02:15:59,955 INFO L78 Accepts]: Start accepts. Automaton has 3115 states and 5627 transitions. Word has length 62 [2021-11-07 02:15:59,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:59,956 INFO L470 AbstractCegarLoop]: Abstraction has 3115 states and 5627 transitions. [2021-11-07 02:15:59,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:59,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3115 states and 5627 transitions. [2021-11-07 02:15:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:15:59,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:59,961 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:59,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:00,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:00,180 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:00,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:00,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1769152156, now seen corresponding path program 1 times [2021-11-07 02:16:00,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:00,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35739121] [2021-11-07 02:16:00,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:00,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:00,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:00,182 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:00,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:16:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:00,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:00,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:00,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:01,120 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:01,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35739121] [2021-11-07 02:16:01,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35739121] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:01,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:01,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:16:01,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651194932] [2021-11-07 02:16:01,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:01,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:01,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:01,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:01,122 INFO L87 Difference]: Start difference. First operand 3115 states and 5627 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:01,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:01,564 INFO L93 Difference]: Finished difference Result 8429 states and 15258 transitions. [2021-11-07 02:16:01,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:01,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 02:16:01,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:01,602 INFO L225 Difference]: With dead ends: 8429 [2021-11-07 02:16:01,602 INFO L226 Difference]: Without dead ends: 5482 [2021-11-07 02:16:01,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:01,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5482 states. [2021-11-07 02:16:02,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5482 to 5333. [2021-11-07 02:16:02,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5333 states, 5331 states have (on average 1.8105421121740761) internal successors, (9652), 5332 states have internal predecessors, (9652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:02,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5333 states to 5333 states and 9652 transitions. [2021-11-07 02:16:02,115 INFO L78 Accepts]: Start accepts. Automaton has 5333 states and 9652 transitions. Word has length 63 [2021-11-07 02:16:02,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:02,116 INFO L470 AbstractCegarLoop]: Abstraction has 5333 states and 9652 transitions. [2021-11-07 02:16:02,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 5333 states and 9652 transitions. [2021-11-07 02:16:02,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:16:02,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:02,122 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 02:16:02,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:02,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:02,341 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:02,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:02,341 INFO L85 PathProgramCache]: Analyzing trace with hash 97503996, now seen corresponding path program 1 times [2021-11-07 02:16:02,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:02,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237122677] [2021-11-07 02:16:02,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:02,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:02,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:02,344 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:02,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:16:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:02,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:02,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:03,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:03,284 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:03,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237122677] [2021-11-07 02:16:03,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237122677] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:03,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:03,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:16:03,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758619357] [2021-11-07 02:16:03,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:03,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:03,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:03,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:03,287 INFO L87 Difference]: Start difference. First operand 5333 states and 9652 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:04,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:04,053 INFO L93 Difference]: Finished difference Result 15409 states and 27944 transitions. [2021-11-07 02:16:04,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:04,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 02:16:04,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:04,152 INFO L225 Difference]: With dead ends: 15409 [2021-11-07 02:16:04,152 INFO L226 Difference]: Without dead ends: 10252 [2021-11-07 02:16:04,162 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:04,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10252 states. [2021-11-07 02:16:04,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10252 to 10103. [2021-11-07 02:16:05,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10103 states, 10101 states have (on average 1.8125928125928126) internal successors, (18309), 10102 states have internal predecessors, (18309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10103 states to 10103 states and 18309 transitions. [2021-11-07 02:16:05,057 INFO L78 Accepts]: Start accepts. Automaton has 10103 states and 18309 transitions. Word has length 64 [2021-11-07 02:16:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:05,058 INFO L470 AbstractCegarLoop]: Abstraction has 10103 states and 18309 transitions. [2021-11-07 02:16:05,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:05,058 INFO L276 IsEmpty]: Start isEmpty. Operand 10103 states and 18309 transitions. [2021-11-07 02:16:05,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:16:05,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:05,064 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:05,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:05,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:05,282 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:05,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:05,283 INFO L85 PathProgramCache]: Analyzing trace with hash 893516268, now seen corresponding path program 1 times [2021-11-07 02:16:05,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:05,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729850337] [2021-11-07 02:16:05,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:05,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:05,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:05,286 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:05,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:16:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:05,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:16:05,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:16:06,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:16:06,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:06,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729850337] [2021-11-07 02:16:06,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729850337] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:06,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:06,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:16:06,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591721919] [2021-11-07 02:16:06,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:16:06,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:06,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:16:06,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:16:06,385 INFO L87 Difference]: Start difference. First operand 10103 states and 18309 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:09,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:09,563 INFO L93 Difference]: Finished difference Result 24868 states and 45080 transitions. [2021-11-07 02:16:09,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:16:09,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 02:16:09,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:09,612 INFO L225 Difference]: With dead ends: 24868 [2021-11-07 02:16:09,612 INFO L226 Difference]: Without dead ends: 15019 [2021-11-07 02:16:09,629 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:16:09,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15019 states. [2021-11-07 02:16:10,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15019 to 10070. [2021-11-07 02:16:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10070 states, 10068 states have (on average 1.8054231227651967) internal successors, (18177), 10069 states have internal predecessors, (18177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10070 states to 10070 states and 18177 transitions. [2021-11-07 02:16:10,487 INFO L78 Accepts]: Start accepts. Automaton has 10070 states and 18177 transitions. Word has length 65 [2021-11-07 02:16:10,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:10,488 INFO L470 AbstractCegarLoop]: Abstraction has 10070 states and 18177 transitions. [2021-11-07 02:16:10,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand 10070 states and 18177 transitions. [2021-11-07 02:16:10,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:16:10,495 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:10,495 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:10,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:10,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:10,714 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:10,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:10,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1886634741, now seen corresponding path program 1 times [2021-11-07 02:16:10,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:10,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364674254] [2021-11-07 02:16:10,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:10,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:10,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:10,717 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:10,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:16:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:11,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:11,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:11,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:11,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:11,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364674254] [2021-11-07 02:16:11,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364674254] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:11,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:11,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:16:11,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821222113] [2021-11-07 02:16:11,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:11,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:11,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:11,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:11,832 INFO L87 Difference]: Start difference. First operand 10070 states and 18177 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:13,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:13,008 INFO L93 Difference]: Finished difference Result 29452 states and 53226 transitions. [2021-11-07 02:16:13,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:13,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 02:16:13,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:13,074 INFO L225 Difference]: With dead ends: 29452 [2021-11-07 02:16:13,075 INFO L226 Difference]: Without dead ends: 19565 [2021-11-07 02:16:13,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:13,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19565 states. [2021-11-07 02:16:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19565 to 19416. [2021-11-07 02:16:14,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19416 states, 19414 states have (on average 1.8049860925105594) internal successors, (35042), 19415 states have internal predecessors, (35042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:14,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19416 states to 19416 states and 35042 transitions. [2021-11-07 02:16:14,403 INFO L78 Accepts]: Start accepts. Automaton has 19416 states and 35042 transitions. Word has length 65 [2021-11-07 02:16:14,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:14,403 INFO L470 AbstractCegarLoop]: Abstraction has 19416 states and 35042 transitions. [2021-11-07 02:16:14,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:14,404 INFO L276 IsEmpty]: Start isEmpty. Operand 19416 states and 35042 transitions. [2021-11-07 02:16:14,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:16:14,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:14,412 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:14,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:14,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:14,630 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:14,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:14,631 INFO L85 PathProgramCache]: Analyzing trace with hash 789925835, now seen corresponding path program 1 times [2021-11-07 02:16:14,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:14,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062130846] [2021-11-07 02:16:14,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:14,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:14,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:14,633 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:14,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:16:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:15,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:15,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:15,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:15,701 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:15,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062130846] [2021-11-07 02:16:15,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062130846] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:15,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:15,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:16:15,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94966822] [2021-11-07 02:16:15,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:15,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:15,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:15,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:15,704 INFO L87 Difference]: Start difference. First operand 19416 states and 35042 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:17,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:17,708 INFO L93 Difference]: Finished difference Result 57676 states and 104135 transitions. [2021-11-07 02:16:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:17,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:16:17,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:17,817 INFO L225 Difference]: With dead ends: 57676 [2021-11-07 02:16:17,817 INFO L226 Difference]: Without dead ends: 38447 [2021-11-07 02:16:17,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:17,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38447 states. [2021-11-07 02:16:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38447 to 38298. [2021-11-07 02:16:20,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38298 states, 38296 states have (on average 1.8024597869229162) internal successors, (69027), 38297 states have internal predecessors, (69027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38298 states to 38298 states and 69027 transitions. [2021-11-07 02:16:20,362 INFO L78 Accepts]: Start accepts. Automaton has 38298 states and 69027 transitions. Word has length 66 [2021-11-07 02:16:20,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:20,363 INFO L470 AbstractCegarLoop]: Abstraction has 38298 states and 69027 transitions. [2021-11-07 02:16:20,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 38298 states and 69027 transitions. [2021-11-07 02:16:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:16:20,371 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:20,372 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] [2021-11-07 02:16:20,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:20,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:20,588 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:20,588 INFO L85 PathProgramCache]: Analyzing trace with hash -553908814, now seen corresponding path program 1 times [2021-11-07 02:16:20,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:20,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904559729] [2021-11-07 02:16:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:20,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:20,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:20,591 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:20,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:16:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:21,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:16:21,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:16:21,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:16:21,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:21,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904559729] [2021-11-07 02:16:21,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904559729] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:21,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:21,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:16:21,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65350757] [2021-11-07 02:16:21,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:16:21,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:21,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:16:21,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:16:21,784 INFO L87 Difference]: Start difference. First operand 38298 states and 69027 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:29,801 INFO L93 Difference]: Finished difference Result 148589 states and 267655 transitions. [2021-11-07 02:16:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:16:29,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:16:29,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:30,034 INFO L225 Difference]: With dead ends: 148589 [2021-11-07 02:16:30,034 INFO L226 Difference]: Without dead ends: 110544 [2021-11-07 02:16:30,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 128 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 02:16:30,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110544 states. [2021-11-07 02:16:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110544 to 38040. [2021-11-07 02:16:33,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38040 states, 38038 states have (on average 1.7875545507124455) internal successors, (67995), 38039 states have internal predecessors, (67995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:33,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38040 states to 38040 states and 67995 transitions. [2021-11-07 02:16:33,863 INFO L78 Accepts]: Start accepts. Automaton has 38040 states and 67995 transitions. Word has length 67 [2021-11-07 02:16:33,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:33,864 INFO L470 AbstractCegarLoop]: Abstraction has 38040 states and 67995 transitions. [2021-11-07 02:16:33,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:33,864 INFO L276 IsEmpty]: Start isEmpty. Operand 38040 states and 67995 transitions. [2021-11-07 02:16:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:16:33,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:33,871 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:33,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:34,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:34,080 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:34,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:34,081 INFO L85 PathProgramCache]: Analyzing trace with hash 317184336, now seen corresponding path program 1 times [2021-11-07 02:16:34,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:34,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38073104] [2021-11-07 02:16:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:34,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:34,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:34,084 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:34,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:16:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:34,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:34,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:35,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:35,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:35,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38073104] [2021-11-07 02:16:35,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38073104] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:35,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:35,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:16:35,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605584809] [2021-11-07 02:16:35,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:16:35,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:35,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:16:35,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:16:35,376 INFO L87 Difference]: Start difference. First operand 38040 states and 67995 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:37,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:37,613 INFO L93 Difference]: Finished difference Result 75970 states and 135803 transitions. [2021-11-07 02:16:37,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:37,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:16:37,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:37,795 INFO L225 Difference]: With dead ends: 75970 [2021-11-07 02:16:37,795 INFO L226 Difference]: Without dead ends: 38189 [2021-11-07 02:16:37,822 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:16:37,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38189 states. [2021-11-07 02:16:40,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38189 to 38040. [2021-11-07 02:16:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38040 states, 38038 states have (on average 1.7841894947158106) internal successors, (67867), 38039 states have internal predecessors, (67867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:40,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38040 states to 38040 states and 67867 transitions. [2021-11-07 02:16:40,306 INFO L78 Accepts]: Start accepts. Automaton has 38040 states and 67867 transitions. Word has length 67 [2021-11-07 02:16:40,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:40,306 INFO L470 AbstractCegarLoop]: Abstraction has 38040 states and 67867 transitions. [2021-11-07 02:16:40,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:40,307 INFO L276 IsEmpty]: Start isEmpty. Operand 38040 states and 67867 transitions. [2021-11-07 02:16:40,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:16:40,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:40,314 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:40,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:40,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:40,532 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:40,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:40,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1173145853, now seen corresponding path program 1 times [2021-11-07 02:16:40,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:40,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115391904] [2021-11-07 02:16:40,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:40,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:40,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:40,534 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:40,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8cbf5f-bcfb-4845-aef7-3dab5b831753/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:16:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:41,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:41,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:41,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:41,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:41,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115391904] [2021-11-07 02:16:41,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115391904] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:41,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:41,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:16:41,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927243748] [2021-11-07 02:16:41,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:41,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:41,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:41,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:41,685 INFO L87 Difference]: Start difference. First operand 38040 states and 67867 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:45,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:45,439 INFO L93 Difference]: Finished difference Result 105708 states and 188229 transitions. [2021-11-07 02:16:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:45,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:16:45,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:45,737 INFO L225 Difference]: With dead ends: 105708 [2021-11-07 02:16:45,737 INFO L226 Difference]: Without dead ends: 67887 [2021-11-07 02:16:45,767 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67887 states.