./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/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_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/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_d494a13b-567d-4df3-ae06-7a70f21fbf88/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 00530584ceb95509e59a4223c6066e974815f5b40475a70fc9a47cceec3e0b2f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:55:53,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:55:53,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:55:54,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:55:54,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:55:54,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:55:54,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:55:54,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:55:54,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:55:54,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:55:54,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:55:54,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:55:54,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:55:54,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:55:54,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:55:54,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:55:54,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:55:54,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:55:54,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:55:54,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:55:54,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:55:54,040 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:55:54,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:55:54,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:55:54,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:55:54,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:55:54,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:55:54,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:55:54,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:55:54,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:55:54,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:55:54,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:55:54,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:55:54,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:55:54,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:55:54,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:55:54,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:55:54,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:55:54,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:55:54,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:55:54,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:55:54,070 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:55:54,099 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:55:54,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:55:54,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:55:54,101 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:55:54,102 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:55:54,102 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:55:54,102 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:55:54,102 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:55:54,103 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:55:54,103 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:55:54,103 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:55:54,103 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:55:54,104 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:55:54,104 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:55:54,104 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:55:54,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:55:54,106 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:55:54,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:55:54,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:55:54,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:55:54,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:55:54,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:55:54,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:55:54,108 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:55:54,108 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:55:54,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:55:54,108 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:55:54,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:55:54,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:55:54,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:55:54,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:55:54,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:55:54,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:55:54,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:55:54,111 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:55:54,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:55:54,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:55:54,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:55:54,112 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:55:54,112 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_d494a13b-567d-4df3-ae06-7a70f21fbf88/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00530584ceb95509e59a4223c6066e974815f5b40475a70fc9a47cceec3e0b2f [2021-11-07 00:55:54,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:55:54,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:55:54,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:55:54,431 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:55:54,431 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:55:54,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product27.cil.c [2021-11-07 00:55:54,558 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/data/4bbb0cec8/b7bcf6f290c04c1d8c7f2d6d10349c50/FLAGfdf2fe1cf [2021-11-07 00:55:55,332 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:55:55,332 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/sv-benchmarks/c/product-lines/email_spec11_product27.cil.c [2021-11-07 00:55:55,367 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/data/4bbb0cec8/b7bcf6f290c04c1d8c7f2d6d10349c50/FLAGfdf2fe1cf [2021-11-07 00:55:55,495 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/data/4bbb0cec8/b7bcf6f290c04c1d8c7f2d6d10349c50 [2021-11-07 00:55:55,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:55:55,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:55:55,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:55:55,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:55:55,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:55:55,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:55:55" (1/1) ... [2021-11-07 00:55:55,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d207bd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:55, skipping insertion in model container [2021-11-07 00:55:55,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:55:55" (1/1) ... [2021-11-07 00:55:55,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:55:55,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:55:56,077 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_d494a13b-567d-4df3-ae06-7a70f21fbf88/sv-benchmarks/c/product-lines/email_spec11_product27.cil.c[34014,34027] [2021-11-07 00:55:56,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:55:56,340 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 00:55:56,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@322f8ccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:56, skipping insertion in model container [2021-11-07 00:55:56,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:55:56,342 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 00:55:56,345 INFO L168 Benchmark]: Toolchain (without parser) took 836.08 ms. Allocated memory is still 102.8 MB. Free memory was 74.3 MB in the beginning and 48.2 MB in the end (delta: 26.1 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-11-07 00:55:56,347 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 79.7 MB. Free memory was 45.3 MB in the beginning and 45.3 MB in the end (delta: 63.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:55:56,349 INFO L168 Benchmark]: CACSL2BoogieTranslator took 828.70 ms. Allocated memory is still 102.8 MB. Free memory was 74.2 MB in the beginning and 48.2 MB in the end (delta: 26.0 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-11-07 00:55:56,352 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 79.7 MB. Free memory was 45.3 MB in the beginning and 45.3 MB in the end (delta: 63.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 828.70 ms. Allocated memory is still 102.8 MB. Free memory was 74.2 MB in the beginning and 48.2 MB in the end (delta: 26.0 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2009]: 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_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/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_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/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_d494a13b-567d-4df3-ae06-7a70f21fbf88/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 00530584ceb95509e59a4223c6066e974815f5b40475a70fc9a47cceec3e0b2f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:55:59,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:55:59,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:55:59,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:55:59,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:55:59,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:55:59,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:55:59,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:55:59,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:55:59,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:55:59,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:55:59,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:55:59,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:55:59,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:55:59,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:55:59,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:55:59,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:55:59,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:55:59,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:55:59,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:55:59,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:55:59,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:55:59,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:55:59,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:55:59,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:55:59,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:55:59,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:55:59,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:55:59,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:55:59,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:55:59,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:55:59,197 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:55:59,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:55:59,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:55:59,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:55:59,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:55:59,204 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:55:59,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:55:59,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:55:59,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:55:59,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:55:59,209 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 00:55:59,243 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:55:59,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:55:59,245 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:55:59,245 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:55:59,245 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:55:59,245 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:55:59,246 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:55:59,246 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:55:59,246 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:55:59,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:55:59,247 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:55:59,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:55:59,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:55:59,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:55:59,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:55:59,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:55:59,249 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:55:59,249 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 00:55:59,249 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 00:55:59,249 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:55:59,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:55:59,250 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:55:59,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:55:59,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:55:59,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 00:55:59,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:55:59,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:55:59,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:55:59,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:55:59,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:55:59,252 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 00:55:59,252 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 00:55:59,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:55:59,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:55:59,253 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:55:59,253 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_d494a13b-567d-4df3-ae06-7a70f21fbf88/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00530584ceb95509e59a4223c6066e974815f5b40475a70fc9a47cceec3e0b2f [2021-11-07 00:55:59,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:55:59,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:55:59,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:55:59,751 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:55:59,752 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:55:59,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product27.cil.c [2021-11-07 00:55:59,831 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/data/5c6336e87/ff3d4481624844fb952e96e3257a24a6/FLAG53d250034 [2021-11-07 00:56:00,633 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:56:00,634 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/sv-benchmarks/c/product-lines/email_spec11_product27.cil.c [2021-11-07 00:56:00,669 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/data/5c6336e87/ff3d4481624844fb952e96e3257a24a6/FLAG53d250034 [2021-11-07 00:56:00,764 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/data/5c6336e87/ff3d4481624844fb952e96e3257a24a6 [2021-11-07 00:56:00,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:56:00,771 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:56:00,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:56:00,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:56:00,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:56:00,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:56:00" (1/1) ... [2021-11-07 00:56:00,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b108c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:00, skipping insertion in model container [2021-11-07 00:56:00,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:56:00" (1/1) ... [2021-11-07 00:56:00,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:56:00,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:56:01,443 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_d494a13b-567d-4df3-ae06-7a70f21fbf88/sv-benchmarks/c/product-lines/email_spec11_product27.cil.c[34014,34027] [2021-11-07 00:56:01,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:56:01,718 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 00:56:01,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:56:01,794 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_d494a13b-567d-4df3-ae06-7a70f21fbf88/sv-benchmarks/c/product-lines/email_spec11_product27.cil.c[34014,34027] [2021-11-07 00:56:01,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:56:01,883 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:56:01,963 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_d494a13b-567d-4df3-ae06-7a70f21fbf88/sv-benchmarks/c/product-lines/email_spec11_product27.cil.c[34014,34027] [2021-11-07 00:56:02,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:56:02,069 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:56:02,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:02 WrapperNode [2021-11-07 00:56:02,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:56:02,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:56:02,072 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:56:02,072 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:56:02,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:02" (1/1) ... [2021-11-07 00:56:02,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:02" (1/1) ... [2021-11-07 00:56:02,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:56:02,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:56:02,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:56:02,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:56:02,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:02" (1/1) ... [2021-11-07 00:56:02,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:02" (1/1) ... [2021-11-07 00:56:02,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:02" (1/1) ... [2021-11-07 00:56:02,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:02" (1/1) ... [2021-11-07 00:56:02,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:02" (1/1) ... [2021-11-07 00:56:02,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:02" (1/1) ... [2021-11-07 00:56:02,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:02" (1/1) ... [2021-11-07 00:56:02,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:56:02,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:56:02,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:56:02,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:56:02,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:02" (1/1) ... [2021-11-07 00:56:02,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:56:02,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:56:02,655 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:56:02,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:56:02,711 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 00:56:02,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:56:02,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 00:56:02,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:56:02,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:56:09,074 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:56:09,074 INFO L299 CfgBuilder]: Removed 685 assume(true) statements. [2021-11-07 00:56:09,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:56:09 BoogieIcfgContainer [2021-11-07 00:56:09,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:56:09,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:56:09,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:56:09,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:56:09,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:56:00" (1/3) ... [2021-11-07 00:56:09,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60627311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:56:09, skipping insertion in model container [2021-11-07 00:56:09,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:02" (2/3) ... [2021-11-07 00:56:09,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60627311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:56:09, skipping insertion in model container [2021-11-07 00:56:09,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:56:09" (3/3) ... [2021-11-07 00:56:09,094 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product27.cil.c [2021-11-07 00:56:09,102 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:56:09,102 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 00:56:09,191 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:56:09,204 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 00:56:09,204 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 00:56:09,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 946 states, 939 states have (on average 1.7220447284345048) internal successors, (1617), 945 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:09,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 00:56:09,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:09,281 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:09,282 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:09,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:09,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1105711759, now seen corresponding path program 1 times [2021-11-07 00:56:09,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:09,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929947446] [2021-11-07 00:56:09,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:09,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:09,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:09,313 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:09,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 00:56:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:09,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 00:56:09,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:10,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:10,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:10,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929947446] [2021-11-07 00:56:10,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929947446] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:10,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:10,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:56:10,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138057697] [2021-11-07 00:56:10,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 00:56:10,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:10,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 00:56:10,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:56:10,377 INFO L87 Difference]: Start difference. First operand has 946 states, 939 states have (on average 1.7220447284345048) internal successors, (1617), 945 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 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 00:56:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:10,522 INFO L93 Difference]: Finished difference Result 1603 states and 2704 transitions. [2021-11-07 00:56:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 00:56:10,524 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 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 48 [2021-11-07 00:56:10,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:10,560 INFO L225 Difference]: With dead ends: 1603 [2021-11-07 00:56:10,560 INFO L226 Difference]: Without dead ends: 866 [2021-11-07 00:56:10,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:56:10,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2021-11-07 00:56:10,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2021-11-07 00:56:10,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 860 states have (on average 1.7209302325581395) internal successors, (1480), 865 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1480 transitions. [2021-11-07 00:56:10,753 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1480 transitions. Word has length 48 [2021-11-07 00:56:10,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:10,753 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1480 transitions. [2021-11-07 00:56:10,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 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 00:56:10,754 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1480 transitions. [2021-11-07 00:56:10,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 00:56:10,759 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:10,759 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:10,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:10,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:10,975 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:10,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:10,976 INFO L85 PathProgramCache]: Analyzing trace with hash 185791452, now seen corresponding path program 1 times [2021-11-07 00:56:10,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:10,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176627665] [2021-11-07 00:56:10,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:10,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:10,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:10,980 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:10,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 00:56:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:11,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:56:11,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:11,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:11,878 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:11,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176627665] [2021-11-07 00:56:11,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176627665] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:11,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:11,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:56:11,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271492119] [2021-11-07 00:56:11,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:56:11,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:11,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:56:11,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:56:11,888 INFO L87 Difference]: Start difference. First operand 866 states and 1480 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:12,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:12,102 INFO L93 Difference]: Finished difference Result 2568 states and 4392 transitions. [2021-11-07 00:56:12,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:56:12,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 00:56:12,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:12,119 INFO L225 Difference]: With dead ends: 2568 [2021-11-07 00:56:12,120 INFO L226 Difference]: Without dead ends: 1717 [2021-11-07 00:56:12,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:56:12,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-11-07 00:56:12,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 865. [2021-11-07 00:56:12,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 859 states have (on average 1.7171129220023282) internal successors, (1475), 864 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:12,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1475 transitions. [2021-11-07 00:56:12,191 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1475 transitions. Word has length 49 [2021-11-07 00:56:12,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:12,193 INFO L470 AbstractCegarLoop]: Abstraction has 865 states and 1475 transitions. [2021-11-07 00:56:12,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:12,194 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1475 transitions. [2021-11-07 00:56:12,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 00:56:12,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:12,206 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:12,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:12,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:12,424 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:12,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:12,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1822267202, now seen corresponding path program 1 times [2021-11-07 00:56:12,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:12,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722911816] [2021-11-07 00:56:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:12,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:12,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:12,430 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:12,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 00:56:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:12,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:56:12,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:13,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:13,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:13,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:13,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722911816] [2021-11-07 00:56:13,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722911816] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:13,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:13,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:56:13,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723219435] [2021-11-07 00:56:13,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:56:13,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:13,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:56:13,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:56:13,388 INFO L87 Difference]: Start difference. First operand 865 states and 1475 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:13,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:13,850 INFO L93 Difference]: Finished difference Result 3377 states and 5762 transitions. [2021-11-07 00:56:13,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:56:13,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 00:56:13,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:13,894 INFO L225 Difference]: With dead ends: 3377 [2021-11-07 00:56:13,894 INFO L226 Difference]: Without dead ends: 2530 [2021-11-07 00:56:13,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:13,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-11-07 00:56:13,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 864. [2021-11-07 00:56:13,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 858 states have (on average 1.7144522144522145) internal successors, (1471), 863 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:13,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1471 transitions. [2021-11-07 00:56:13,982 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1471 transitions. Word has length 51 [2021-11-07 00:56:13,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:13,983 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 1471 transitions. [2021-11-07 00:56:13,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:13,983 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1471 transitions. [2021-11-07 00:56:13,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 00:56:13,985 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:13,986 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:14,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:14,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:14,205 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:14,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:14,205 INFO L85 PathProgramCache]: Analyzing trace with hash 118049493, now seen corresponding path program 1 times [2021-11-07 00:56:14,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:14,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470141575] [2021-11-07 00:56:14,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:14,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:14,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:14,209 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:14,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 00:56:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:14,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:56:14,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:14,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:15,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:15,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470141575] [2021-11-07 00:56:15,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470141575] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:15,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:15,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:56:15,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881147673] [2021-11-07 00:56:15,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:56:15,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:15,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:56:15,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:56:15,206 INFO L87 Difference]: Start difference. First operand 864 states and 1471 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:15,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:15,353 INFO L93 Difference]: Finished difference Result 1725 states and 2939 transitions. [2021-11-07 00:56:15,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:56:15,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 00:56:15,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:15,361 INFO L225 Difference]: With dead ends: 1725 [2021-11-07 00:56:15,362 INFO L226 Difference]: Without dead ends: 869 [2021-11-07 00:56:15,363 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:56:15,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-11-07 00:56:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 864. [2021-11-07 00:56:15,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 858 states have (on average 1.710955710955711) internal successors, (1468), 863 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1468 transitions. [2021-11-07 00:56:15,442 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1468 transitions. Word has length 52 [2021-11-07 00:56:15,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:15,445 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 1468 transitions. [2021-11-07 00:56:15,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:15,446 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1468 transitions. [2021-11-07 00:56:15,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 00:56:15,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:15,448 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:15,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:15,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:15,662 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:15,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:15,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1023611434, now seen corresponding path program 1 times [2021-11-07 00:56:15,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:15,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065351016] [2021-11-07 00:56:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:15,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:15,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:15,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:15,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 00:56:16,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:16,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:56:16,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:16,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:16,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:16,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065351016] [2021-11-07 00:56:16,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065351016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:16,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:16,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:56:16,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246018433] [2021-11-07 00:56:16,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:56:16,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:16,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:56:16,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:56:16,694 INFO L87 Difference]: Start difference. First operand 864 states and 1468 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 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 00:56:17,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:17,196 INFO L93 Difference]: Finished difference Result 3364 states and 5738 transitions. [2021-11-07 00:56:17,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:56:17,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 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 53 [2021-11-07 00:56:17,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:17,217 INFO L225 Difference]: With dead ends: 3364 [2021-11-07 00:56:17,217 INFO L226 Difference]: Without dead ends: 2526 [2021-11-07 00:56:17,219 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:17,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2526 states. [2021-11-07 00:56:17,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2526 to 864. [2021-11-07 00:56:17,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 858 states have (on average 1.7074592074592074) internal successors, (1465), 863 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1465 transitions. [2021-11-07 00:56:17,321 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1465 transitions. Word has length 53 [2021-11-07 00:56:17,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:17,322 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 1465 transitions. [2021-11-07 00:56:17,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 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 00:56:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1465 transitions. [2021-11-07 00:56:17,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 00:56:17,324 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:17,324 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:17,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 00:56:17,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:17,540 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:17,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:17,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1464738597, now seen corresponding path program 1 times [2021-11-07 00:56:17,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:17,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089443528] [2021-11-07 00:56:17,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:17,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:17,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:17,544 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:17,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 00:56:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:18,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:56:18,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:18,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:18,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:18,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089443528] [2021-11-07 00:56:18,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089443528] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:18,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:18,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:56:18,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277303656] [2021-11-07 00:56:18,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:56:18,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:18,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:56:18,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:56:18,559 INFO L87 Difference]: Start difference. First operand 864 states and 1465 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:18,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:18,769 INFO L93 Difference]: Finished difference Result 2279 states and 3853 transitions. [2021-11-07 00:56:18,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:56:18,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 00:56:18,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:18,783 INFO L225 Difference]: With dead ends: 2279 [2021-11-07 00:56:18,784 INFO L226 Difference]: Without dead ends: 1702 [2021-11-07 00:56:18,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:56:18,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2021-11-07 00:56:18,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1125. [2021-11-07 00:56:18,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1119 states have (on average 1.7381590705987489) internal successors, (1945), 1124 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:18,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1945 transitions. [2021-11-07 00:56:18,924 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1945 transitions. Word has length 55 [2021-11-07 00:56:18,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:18,925 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 1945 transitions. [2021-11-07 00:56:18,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:18,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1945 transitions. [2021-11-07 00:56:18,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 00:56:18,928 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:18,929 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 00:56:18,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:19,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:19,142 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:19,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:19,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1224946006, now seen corresponding path program 1 times [2021-11-07 00:56:19,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:19,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956305717] [2021-11-07 00:56:19,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:19,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:19,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:19,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:19,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 00:56:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:19,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:56:19,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:20,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:20,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:20,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956305717] [2021-11-07 00:56:20,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956305717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:20,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:20,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:56:20,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109713532] [2021-11-07 00:56:20,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:20,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:20,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:20,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:20,237 INFO L87 Difference]: Start difference. First operand 1125 states and 1945 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 00:56:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:20,441 INFO L93 Difference]: Finished difference Result 2952 states and 5094 transitions. [2021-11-07 00:56:20,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:20,442 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 00:56:20,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:20,458 INFO L225 Difference]: With dead ends: 2952 [2021-11-07 00:56:20,458 INFO L226 Difference]: Without dead ends: 1911 [2021-11-07 00:56:20,462 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 00:56:20,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2021-11-07 00:56:20,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1334. [2021-11-07 00:56:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1328 states have (on average 1.7530120481927711) internal successors, (2328), 1333 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:20,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 2328 transitions. [2021-11-07 00:56:20,641 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 2328 transitions. Word has length 67 [2021-11-07 00:56:20,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:20,644 INFO L470 AbstractCegarLoop]: Abstraction has 1334 states and 2328 transitions. [2021-11-07 00:56:20,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:20,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 2328 transitions. [2021-11-07 00:56:20,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 00:56:20,648 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:20,648 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:20,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:20,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:20,868 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:20,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:20,868 INFO L85 PathProgramCache]: Analyzing trace with hash -397916747, now seen corresponding path program 1 times [2021-11-07 00:56:20,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:20,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154280313] [2021-11-07 00:56:20,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:20,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:20,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:20,872 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:20,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 00:56:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:21,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:56:21,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:21,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:21,981 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:21,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154280313] [2021-11-07 00:56:21,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154280313] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:21,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:21,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:56:21,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612265513] [2021-11-07 00:56:21,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:21,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:21,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:21,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:21,984 INFO L87 Difference]: Start difference. First operand 1334 states and 2328 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:22,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:22,214 INFO L93 Difference]: Finished difference Result 3611 states and 6308 transitions. [2021-11-07 00:56:22,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:22,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 00:56:22,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:22,232 INFO L225 Difference]: With dead ends: 3611 [2021-11-07 00:56:22,233 INFO L226 Difference]: Without dead ends: 2369 [2021-11-07 00:56:22,235 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:22,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-11-07 00:56:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 1792. [2021-11-07 00:56:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1786 states have (on average 1.7749160134378499) internal successors, (3170), 1791 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 3170 transitions. [2021-11-07 00:56:22,413 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 3170 transitions. Word has length 68 [2021-11-07 00:56:22,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:22,414 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 3170 transitions. [2021-11-07 00:56:22,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:22,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 3170 transitions. [2021-11-07 00:56:22,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 00:56:22,418 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:22,419 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:22,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:22,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:22,638 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:22,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:22,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1939740292, now seen corresponding path program 1 times [2021-11-07 00:56:22,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:22,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467310407] [2021-11-07 00:56:22,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:22,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:22,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:22,641 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:22,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 00:56:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:23,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:56:23,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:23,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:23,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:23,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467310407] [2021-11-07 00:56:23,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467310407] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:23,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:23,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:56:23,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93982913] [2021-11-07 00:56:23,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:23,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:23,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:23,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:23,762 INFO L87 Difference]: Start difference. First operand 1792 states and 3170 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:24,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:24,075 INFO L93 Difference]: Finished difference Result 4965 states and 8803 transitions. [2021-11-07 00:56:24,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:24,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 00:56:24,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:24,102 INFO L225 Difference]: With dead ends: 4965 [2021-11-07 00:56:24,102 INFO L226 Difference]: Without dead ends: 3273 [2021-11-07 00:56:24,106 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:24,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-11-07 00:56:24,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2696. [2021-11-07 00:56:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2690 states have (on average 1.7966542750929368) internal successors, (4833), 2695 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:24,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 4833 transitions. [2021-11-07 00:56:24,368 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 4833 transitions. Word has length 69 [2021-11-07 00:56:24,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:24,369 INFO L470 AbstractCegarLoop]: Abstraction has 2696 states and 4833 transitions. [2021-11-07 00:56:24,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:24,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 4833 transitions. [2021-11-07 00:56:24,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 00:56:24,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:24,380 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:24,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:24,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:24,599 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:24,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:24,599 INFO L85 PathProgramCache]: Analyzing trace with hash -566643708, now seen corresponding path program 1 times [2021-11-07 00:56:24,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:24,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412082730] [2021-11-07 00:56:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:24,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:24,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:24,602 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:24,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 00:56:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:25,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:56:25,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:25,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:25,672 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:25,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412082730] [2021-11-07 00:56:25,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412082730] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:25,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:25,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:56:25,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101701685] [2021-11-07 00:56:25,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:25,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:25,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:25,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:25,674 INFO L87 Difference]: Start difference. First operand 2696 states and 4833 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:26,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:26,027 INFO L93 Difference]: Finished difference Result 7413 states and 13311 transitions. [2021-11-07 00:56:26,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:26,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 00:56:26,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:26,067 INFO L225 Difference]: With dead ends: 7413 [2021-11-07 00:56:26,067 INFO L226 Difference]: Without dead ends: 4851 [2021-11-07 00:56:26,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4851 states. [2021-11-07 00:56:26,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4851 to 4274. [2021-11-07 00:56:26,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4274 states, 4268 states have (on average 1.8120899718837864) internal successors, (7734), 4273 states have internal predecessors, (7734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4274 states to 4274 states and 7734 transitions. [2021-11-07 00:56:26,424 INFO L78 Accepts]: Start accepts. Automaton has 4274 states and 7734 transitions. Word has length 70 [2021-11-07 00:56:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:26,424 INFO L470 AbstractCegarLoop]: Abstraction has 4274 states and 7734 transitions. [2021-11-07 00:56:26,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 4274 states and 7734 transitions. [2021-11-07 00:56:26,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 00:56:26,434 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:26,435 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:26,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:26,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:26,652 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:26,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:26,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1752606773, now seen corresponding path program 1 times [2021-11-07 00:56:26,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:26,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860652777] [2021-11-07 00:56:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:26,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:26,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:26,655 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:26,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 00:56:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:27,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:56:27,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:27,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:27,580 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:27,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860652777] [2021-11-07 00:56:27,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860652777] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:27,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:27,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:56:27,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730351021] [2021-11-07 00:56:27,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:27,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:27,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:27,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:27,582 INFO L87 Difference]: Start difference. First operand 4274 states and 7734 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:28,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:28,106 INFO L93 Difference]: Finished difference Result 11863 states and 21497 transitions. [2021-11-07 00:56:28,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:28,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 00:56:28,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:28,145 INFO L225 Difference]: With dead ends: 11863 [2021-11-07 00:56:28,145 INFO L226 Difference]: Without dead ends: 7757 [2021-11-07 00:56:28,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:28,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7757 states. [2021-11-07 00:56:28,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7757 to 7180. [2021-11-07 00:56:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7180 states, 7174 states have (on average 1.821996097017006) internal successors, (13071), 7179 states have internal predecessors, (13071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7180 states to 7180 states and 13071 transitions. [2021-11-07 00:56:28,679 INFO L78 Accepts]: Start accepts. Automaton has 7180 states and 13071 transitions. Word has length 71 [2021-11-07 00:56:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:28,680 INFO L470 AbstractCegarLoop]: Abstraction has 7180 states and 13071 transitions. [2021-11-07 00:56:28,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:28,680 INFO L276 IsEmpty]: Start isEmpty. Operand 7180 states and 13071 transitions. [2021-11-07 00:56:28,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 00:56:28,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:28,688 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:28,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:28,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:28,906 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:28,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:28,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2098263189, now seen corresponding path program 1 times [2021-11-07 00:56:28,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:28,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515643218] [2021-11-07 00:56:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:28,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:28,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:28,911 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:28,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 00:56:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:29,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:56:29,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:29,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:30,003 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 00:56:30,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:30,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515643218] [2021-11-07 00:56:30,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515643218] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:30,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:30,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:56:30,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990277269] [2021-11-07 00:56:30,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:30,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:30,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:30,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:30,008 INFO L87 Difference]: Start difference. First operand 7180 states and 13071 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:30,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:30,666 INFO L93 Difference]: Finished difference Result 20907 states and 38119 transitions. [2021-11-07 00:56:30,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:30,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 00:56:30,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:30,723 INFO L225 Difference]: With dead ends: 20907 [2021-11-07 00:56:30,723 INFO L226 Difference]: Without dead ends: 13903 [2021-11-07 00:56:30,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13903 states. [2021-11-07 00:56:31,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13903 to 13326. [2021-11-07 00:56:31,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13326 states, 13320 states have (on average 1.8282282282282283) internal successors, (24352), 13325 states have internal predecessors, (24352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:31,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13326 states to 13326 states and 24352 transitions. [2021-11-07 00:56:31,674 INFO L78 Accepts]: Start accepts. Automaton has 13326 states and 24352 transitions. Word has length 72 [2021-11-07 00:56:31,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:31,674 INFO L470 AbstractCegarLoop]: Abstraction has 13326 states and 24352 transitions. [2021-11-07 00:56:31,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:31,675 INFO L276 IsEmpty]: Start isEmpty. Operand 13326 states and 24352 transitions. [2021-11-07 00:56:31,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 00:56:31,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:31,687 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:31,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 00:56:31,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:31,902 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:31,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:31,902 INFO L85 PathProgramCache]: Analyzing trace with hash -30836283, now seen corresponding path program 1 times [2021-11-07 00:56:31,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:31,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957423837] [2021-11-07 00:56:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:31,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:31,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:31,905 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:31,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 00:56:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:32,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:56:32,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:32,888 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 00:56:32,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:33,156 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 00:56:33,156 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:33,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957423837] [2021-11-07 00:56:33,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957423837] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:33,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:33,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:56:33,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052368405] [2021-11-07 00:56:33,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:56:33,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:33,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:56:33,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:56:33,160 INFO L87 Difference]: Start difference. First operand 13326 states and 24352 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:36,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:36,612 INFO L93 Difference]: Finished difference Result 33075 states and 60421 transitions. [2021-11-07 00:56:36,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:56:36,613 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 00:56:36,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:36,668 INFO L225 Difference]: With dead ends: 33075 [2021-11-07 00:56:36,668 INFO L226 Difference]: Without dead ends: 20046 [2021-11-07 00:56:36,686 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 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 00:56:36,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20046 states. [2021-11-07 00:56:37,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20046 to 13293. [2021-11-07 00:56:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13293 states, 13287 states have (on average 1.82283434936404) internal successors, (24220), 13292 states have internal predecessors, (24220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13293 states to 13293 states and 24220 transitions. [2021-11-07 00:56:37,613 INFO L78 Accepts]: Start accepts. Automaton has 13293 states and 24220 transitions. Word has length 73 [2021-11-07 00:56:37,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:37,613 INFO L470 AbstractCegarLoop]: Abstraction has 13293 states and 24220 transitions. [2021-11-07 00:56:37,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:37,614 INFO L276 IsEmpty]: Start isEmpty. Operand 13293 states and 24220 transitions. [2021-11-07 00:56:37,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 00:56:37,626 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:37,627 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:37,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:37,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:37,842 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:37,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:37,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1271011420, now seen corresponding path program 1 times [2021-11-07 00:56:37,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:37,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21136044] [2021-11-07 00:56:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:37,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:37,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:37,844 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:37,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 00:56:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:38,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:56:38,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:38,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:38,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:38,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21136044] [2021-11-07 00:56:38,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21136044] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:38,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:38,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:56:38,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611369054] [2021-11-07 00:56:38,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:38,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:38,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:38,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:38,899 INFO L87 Difference]: Start difference. First operand 13293 states and 24220 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:39,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:39,993 INFO L93 Difference]: Finished difference Result 39078 states and 71273 transitions. [2021-11-07 00:56:39,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:39,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 00:56:39,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:40,046 INFO L225 Difference]: With dead ends: 39078 [2021-11-07 00:56:40,047 INFO L226 Difference]: Without dead ends: 25968 [2021-11-07 00:56:40,067 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:40,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25968 states. [2021-11-07 00:56:41,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25968 to 25391. [2021-11-07 00:56:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25391 states, 25385 states have (on average 1.8252117392160725) internal successors, (46333), 25390 states have internal predecessors, (46333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25391 states to 25391 states and 46333 transitions. [2021-11-07 00:56:41,843 INFO L78 Accepts]: Start accepts. Automaton has 25391 states and 46333 transitions. Word has length 73 [2021-11-07 00:56:41,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:41,844 INFO L470 AbstractCegarLoop]: Abstraction has 25391 states and 46333 transitions. [2021-11-07 00:56:41,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 25391 states and 46333 transitions. [2021-11-07 00:56:41,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 00:56:41,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:41,859 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:41,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:42,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:42,074 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:42,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:42,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1108854172, now seen corresponding path program 1 times [2021-11-07 00:56:42,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:42,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964876935] [2021-11-07 00:56:42,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:42,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:42,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:42,076 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:42,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 00:56:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:42,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:56:42,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:43,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:43,248 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:43,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964876935] [2021-11-07 00:56:43,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964876935] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:43,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:43,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:56:43,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126092072] [2021-11-07 00:56:43,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:56:43,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:56:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:43,250 INFO L87 Difference]: Start difference. First operand 25391 states and 46333 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:45,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:45,411 INFO L93 Difference]: Finished difference Result 70011 states and 127348 transitions. [2021-11-07 00:56:45,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:56:45,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 00:56:45,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:45,490 INFO L225 Difference]: With dead ends: 70011 [2021-11-07 00:56:45,490 INFO L226 Difference]: Without dead ends: 44850 [2021-11-07 00:56:45,510 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:56:45,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44850 states. [2021-11-07 00:56:48,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44850 to 44273. [2021-11-07 00:56:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44273 states, 44267 states have (on average 1.814398987959428) internal successors, (80318), 44272 states have internal predecessors, (80318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:49,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44273 states to 44273 states and 80318 transitions. [2021-11-07 00:56:49,054 INFO L78 Accepts]: Start accepts. Automaton has 44273 states and 80318 transitions. Word has length 74 [2021-11-07 00:56:49,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:49,054 INFO L470 AbstractCegarLoop]: Abstraction has 44273 states and 80318 transitions. [2021-11-07 00:56:49,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:49,055 INFO L276 IsEmpty]: Start isEmpty. Operand 44273 states and 80318 transitions. [2021-11-07 00:56:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 00:56:49,069 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:49,069 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:49,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:49,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:49,290 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:56:49,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:49,290 INFO L85 PathProgramCache]: Analyzing trace with hash -342466677, now seen corresponding path program 1 times [2021-11-07 00:56:49,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:49,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131586081] [2021-11-07 00:56:49,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:49,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:49,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:49,292 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:49,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 00:56:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:50,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:56:50,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 00:56:50,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:50,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 00:56:50,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:50,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131586081] [2021-11-07 00:56:50,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131586081] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:50,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:50,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:56:50,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550608370] [2021-11-07 00:56:50,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:56:50,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:50,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:56:50,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:56:50,550 INFO L87 Difference]: Start difference. First operand 44273 states and 80318 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:58,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:58,772 INFO L93 Difference]: Finished difference Result 172360 states and 312573 transitions. [2021-11-07 00:56:58,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 00:56:58,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 00:56:58,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:59,064 INFO L225 Difference]: With dead ends: 172360 [2021-11-07 00:56:59,064 INFO L226 Difference]: Without dead ends: 128383 [2021-11-07 00:56:59,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:56:59,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128383 states. [2021-11-07 00:57:03,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128383 to 44015. [2021-11-07 00:57:03,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44015 states, 44009 states have (on average 1.8015860392192506) internal successors, (79286), 44014 states have internal predecessors, (79286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44015 states to 44015 states and 79286 transitions. [2021-11-07 00:57:03,456 INFO L78 Accepts]: Start accepts. Automaton has 44015 states and 79286 transitions. Word has length 75 [2021-11-07 00:57:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:03,457 INFO L470 AbstractCegarLoop]: Abstraction has 44015 states and 79286 transitions. [2021-11-07 00:57:03,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:03,457 INFO L276 IsEmpty]: Start isEmpty. Operand 44015 states and 79286 transitions. [2021-11-07 00:57:03,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 00:57:03,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:03,472 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:03,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:03,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:03,678 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:57:03,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:03,679 INFO L85 PathProgramCache]: Analyzing trace with hash -298076887, now seen corresponding path program 1 times [2021-11-07 00:57:03,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:03,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554481473] [2021-11-07 00:57:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:03,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:03,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:03,681 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:03,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 00:57:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:04,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:57:04,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:04,839 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 00:57:04,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:05,038 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 00:57:05,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:05,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554481473] [2021-11-07 00:57:05,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554481473] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:05,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:05,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:57:05,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977520570] [2021-11-07 00:57:05,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:57:05,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:05,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:57:05,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:57:05,042 INFO L87 Difference]: Start difference. First operand 44015 states and 79286 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:07,598 INFO L93 Difference]: Finished difference Result 88305 states and 159016 transitions. [2021-11-07 00:57:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:57:07,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 00:57:07,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:07,676 INFO L225 Difference]: With dead ends: 88305 [2021-11-07 00:57:07,676 INFO L226 Difference]: Without dead ends: 44592 [2021-11-07 00:57:07,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:57:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44592 states. [2021-11-07 00:57:10,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44592 to 44015. [2021-11-07 00:57:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44015 states, 44009 states have (on average 1.798677543229794) internal successors, (79158), 44014 states have internal predecessors, (79158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:10,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44015 states to 44015 states and 79158 transitions. [2021-11-07 00:57:10,637 INFO L78 Accepts]: Start accepts. Automaton has 44015 states and 79158 transitions. Word has length 75 [2021-11-07 00:57:10,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:10,637 INFO L470 AbstractCegarLoop]: Abstraction has 44015 states and 79158 transitions. [2021-11-07 00:57:10,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:10,638 INFO L276 IsEmpty]: Start isEmpty. Operand 44015 states and 79158 transitions. [2021-11-07 00:57:10,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 00:57:10,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:10,646 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:10,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:10,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:10,850 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:57:10,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:10,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1536450966, now seen corresponding path program 1 times [2021-11-07 00:57:10,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:10,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202067285] [2021-11-07 00:57:10,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:10,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:10,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:10,852 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:10,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d494a13b-567d-4df3-ae06-7a70f21fbf88/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 00:57:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:11,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:57:11,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:11,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:12,148 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 00:57:12,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:12,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202067285] [2021-11-07 00:57:12,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202067285] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:12,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:12,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:57:12,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718446872] [2021-11-07 00:57:12,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:57:12,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:12,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:57:12,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:57:12,150 INFO L87 Difference]: Start difference. First operand 44015 states and 79158 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)