./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec9_product35.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_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/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_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product35.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/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_85946aea-5120-4f13-bd21-68e01633b85f/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 979399ca852926e8ca1f854d8ed303a24eaf5d25d69a2db1d99b3449cc418039 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:13:47,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:13:47,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:13:47,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:13:47,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:13:47,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:13:47,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:13:47,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:13:47,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:13:47,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:13:47,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:13:47,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:13:47,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:13:47,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:13:47,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:13:47,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:13:47,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:13:47,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:13:47,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:13:47,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:13:47,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:13:47,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:13:47,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:13:47,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:13:47,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:13:47,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:13:47,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:13:47,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:13:47,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:13:47,380 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:13:47,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:13:47,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:13:47,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:13:47,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:13:47,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:13:47,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:13:47,387 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:13:47,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:13:47,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:13:47,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:13:47,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:13:47,389 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:13:47,442 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:13:47,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:13:47,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:13:47,444 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:13:47,444 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:13:47,444 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:13:47,444 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:13:47,445 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:13:47,451 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:13:47,451 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:13:47,451 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:13:47,451 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:13:47,452 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:13:47,452 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:13:47,452 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:13:47,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:13:47,453 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:13:47,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:13:47,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:13:47,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:13:47,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:13:47,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:13:47,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:13:47,454 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:13:47,454 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:13:47,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:13:47,455 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:13:47,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:13:47,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:13:47,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:13:47,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:13:47,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:13:47,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:13:47,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:13:47,456 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:13:47,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:13:47,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:13:47,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:13:47,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:13:47,460 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_85946aea-5120-4f13-bd21-68e01633b85f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 979399ca852926e8ca1f854d8ed303a24eaf5d25d69a2db1d99b3449cc418039 [2021-11-07 01:13:47,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:13:47,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:13:47,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:13:47,801 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:13:47,801 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:13:47,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product35.cil.c [2021-11-07 01:13:47,875 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/data/2ae2bafc1/fcd819e602254fe88c736cde7165fc6e/FLAG7e853f554 [2021-11-07 01:13:48,559 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:13:48,566 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/sv-benchmarks/c/product-lines/email_spec9_product35.cil.c [2021-11-07 01:13:48,601 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/data/2ae2bafc1/fcd819e602254fe88c736cde7165fc6e/FLAG7e853f554 [2021-11-07 01:13:48,696 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/data/2ae2bafc1/fcd819e602254fe88c736cde7165fc6e [2021-11-07 01:13:48,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:13:48,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:13:48,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:13:48,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:13:48,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:13:48,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:48" (1/1) ... [2021-11-07 01:13:48,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dad8896 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:48, skipping insertion in model container [2021-11-07 01:13:48,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:48" (1/1) ... [2021-11-07 01:13:48,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:13:48,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:13:49,430 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_85946aea-5120-4f13-bd21-68e01633b85f/sv-benchmarks/c/product-lines/email_spec9_product35.cil.c[46615,46628] [2021-11-07 01:13:49,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:13:49,534 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:13:49,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@252748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:49, skipping insertion in model container [2021-11-07 01:13:49,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:13:49,536 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:13:49,538 INFO L168 Benchmark]: Toolchain (without parser) took 836.15 ms. Allocated memory is still 111.1 MB. Free memory was 86.5 MB in the beginning and 71.7 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:13:49,540 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 81.8 MB. Free memory is still 58.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:13:49,541 INFO L168 Benchmark]: CACSL2BoogieTranslator took 833.81 ms. Allocated memory is still 111.1 MB. Free memory was 86.1 MB in the beginning and 71.7 MB in the end (delta: 14.4 MB). Peak memory consumption was 12.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:13:49,544 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 81.8 MB. Free memory is still 58.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 833.81 ms. Allocated memory is still 111.1 MB. Free memory was 86.1 MB in the beginning and 71.7 MB in the end (delta: 14.4 MB). Peak memory consumption was 12.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1715]: 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_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/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_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product35.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/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_85946aea-5120-4f13-bd21-68e01633b85f/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 979399ca852926e8ca1f854d8ed303a24eaf5d25d69a2db1d99b3449cc418039 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:13:51,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:13:51,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:13:51,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:13:51,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:13:51,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:13:51,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:13:51,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:13:51,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:13:51,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:13:51,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:13:51,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:13:51,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:13:51,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:13:51,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:13:51,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:13:51,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:13:51,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:13:51,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:13:51,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:13:51,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:13:51,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:13:51,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:13:51,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:13:51,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:13:51,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:13:51,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:13:51,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:13:51,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:13:51,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:13:51,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:13:51,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:13:51,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:13:51,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:13:51,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:13:51,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:13:51,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:13:51,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:13:51,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:13:51,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:13:51,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:13:51,894 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:13:51,935 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:13:51,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:13:51,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:13:51,937 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:13:51,938 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:13:51,938 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:13:51,938 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:13:51,938 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:13:51,938 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:13:51,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:13:51,941 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:13:51,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:13:51,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:13:51,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:13:51,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:13:51,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:13:51,942 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:13:51,943 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:13:51,943 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:13:51,943 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:13:51,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:13:51,943 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:13:51,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:13:51,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:13:51,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:13:51,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:13:51,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:13:51,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:13:51,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:13:51,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:13:51,946 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:13:51,946 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:13:51,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:13:51,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:13:51,947 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:13:51,947 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_85946aea-5120-4f13-bd21-68e01633b85f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 979399ca852926e8ca1f854d8ed303a24eaf5d25d69a2db1d99b3449cc418039 [2021-11-07 01:13:52,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:13:52,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:13:52,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:13:52,340 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:13:52,341 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:13:52,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product35.cil.c [2021-11-07 01:13:52,428 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/data/d50a64d12/9791f057d59440ef83270612f40684a5/FLAG8bcb860b3 [2021-11-07 01:13:53,223 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:13:53,223 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/sv-benchmarks/c/product-lines/email_spec9_product35.cil.c [2021-11-07 01:13:53,260 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/data/d50a64d12/9791f057d59440ef83270612f40684a5/FLAG8bcb860b3 [2021-11-07 01:13:53,429 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/data/d50a64d12/9791f057d59440ef83270612f40684a5 [2021-11-07 01:13:53,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:13:53,433 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:13:53,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:13:53,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:13:53,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:13:53,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:53" (1/1) ... [2021-11-07 01:13:53,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e9e0b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:53, skipping insertion in model container [2021-11-07 01:13:53,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:53" (1/1) ... [2021-11-07 01:13:53,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:13:53,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:13:54,075 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_85946aea-5120-4f13-bd21-68e01633b85f/sv-benchmarks/c/product-lines/email_spec9_product35.cil.c[46615,46628] [2021-11-07 01:13:54,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:13:54,200 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:13:54,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:13:54,284 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_85946aea-5120-4f13-bd21-68e01633b85f/sv-benchmarks/c/product-lines/email_spec9_product35.cil.c[46615,46628] [2021-11-07 01:13:54,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:13:54,334 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:13:54,426 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_85946aea-5120-4f13-bd21-68e01633b85f/sv-benchmarks/c/product-lines/email_spec9_product35.cil.c[46615,46628] [2021-11-07 01:13:54,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:13:54,513 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:13:54,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:54 WrapperNode [2021-11-07 01:13:54,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:13:54,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:13:54,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:13:54,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:13:54,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:54" (1/1) ... [2021-11-07 01:13:54,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:54" (1/1) ... [2021-11-07 01:13:54,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:13:54,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:13:54,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:13:54,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:13:54,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:54" (1/1) ... [2021-11-07 01:13:54,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:54" (1/1) ... [2021-11-07 01:13:54,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:54" (1/1) ... [2021-11-07 01:13:54,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:54" (1/1) ... [2021-11-07 01:13:54,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:54" (1/1) ... [2021-11-07 01:13:55,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:54" (1/1) ... [2021-11-07 01:13:55,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:54" (1/1) ... [2021-11-07 01:13:55,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:13:55,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:13:55,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:13:55,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:13:55,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:54" (1/1) ... [2021-11-07 01:13:55,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:13:55,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:13:55,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:13:55,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:13:55,164 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:13:55,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:13:55,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:13:55,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:13:55,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:14:01,631 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:14:01,632 INFO L299 CfgBuilder]: Removed 937 assume(true) statements. [2021-11-07 01:14:01,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:14:01 BoogieIcfgContainer [2021-11-07 01:14:01,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:14:01,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:14:01,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:14:01,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:14:01,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:13:53" (1/3) ... [2021-11-07 01:14:01,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f76e36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:14:01, skipping insertion in model container [2021-11-07 01:14:01,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:54" (2/3) ... [2021-11-07 01:14:01,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f76e36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:14:01, skipping insertion in model container [2021-11-07 01:14:01,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:14:01" (3/3) ... [2021-11-07 01:14:01,644 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec9_product35.cil.c [2021-11-07 01:14:01,649 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:14:01,650 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:14:01,707 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:14:01,714 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:14:01,714 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:14:01,773 INFO L276 IsEmpty]: Start isEmpty. Operand has 1342 states, 1335 states have (on average 1.7191011235955056) internal successors, (2295), 1341 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:01,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:14:01,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:01,796 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:01,796 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:14:01,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:01,802 INFO L85 PathProgramCache]: Analyzing trace with hash 140083866, now seen corresponding path program 1 times [2021-11-07 01:14:01,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:01,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353038083] [2021-11-07 01:14:01,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:01,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:01,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:01,820 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:01,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:14:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:02,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:14:02,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:02,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:02,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:02,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353038083] [2021-11-07 01:14:02,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353038083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:02,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:02,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:14:02,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657709983] [2021-11-07 01:14:02,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:14:02,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:02,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:14:02,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:14:02,695 INFO L87 Difference]: Start difference. First operand has 1342 states, 1335 states have (on average 1.7191011235955056) internal successors, (2295), 1341 states have internal predecessors, (2295), 0 states have call successors, (0), 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 01:14:02,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:02,816 INFO L93 Difference]: Finished difference Result 2395 states and 4060 transitions. [2021-11-07 01:14:02,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:14:02,818 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 01:14:02,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:02,846 INFO L225 Difference]: With dead ends: 2395 [2021-11-07 01:14:02,846 INFO L226 Difference]: Without dead ends: 1096 [2021-11-07 01:14:02,856 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 01:14:02,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-11-07 01:14:02,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1096. [2021-11-07 01:14:03,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1090 states have (on average 1.7229357798165137) internal successors, (1878), 1095 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:03,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1878 transitions. [2021-11-07 01:14:03,015 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1878 transitions. Word has length 48 [2021-11-07 01:14:03,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:03,015 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 1878 transitions. [2021-11-07 01:14:03,016 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 01:14:03,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1878 transitions. [2021-11-07 01:14:03,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:14:03,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:03,021 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:03,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:14:03,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:03,236 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:14:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:03,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1431587077, now seen corresponding path program 1 times [2021-11-07 01:14:03,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:03,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941390071] [2021-11-07 01:14:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:03,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:03,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:03,248 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:03,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:14:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:03,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:14:03,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:03,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:03,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:03,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941390071] [2021-11-07 01:14:03,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941390071] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:03,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:03,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:14:03,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039674432] [2021-11-07 01:14:03,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:14:03,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:03,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:14:03,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:14:03,979 INFO L87 Difference]: Start difference. First operand 1096 states and 1878 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:04,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:04,178 INFO L93 Difference]: Finished difference Result 3258 states and 5586 transitions. [2021-11-07 01:14:04,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:14:04,179 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 01:14:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:04,194 INFO L225 Difference]: With dead ends: 3258 [2021-11-07 01:14:04,195 INFO L226 Difference]: Without dead ends: 2177 [2021-11-07 01:14:04,198 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 01:14:04,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2021-11-07 01:14:04,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 1095. [2021-11-07 01:14:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1089 states have (on average 1.7199265381083564) internal successors, (1873), 1094 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1873 transitions. [2021-11-07 01:14:04,287 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1873 transitions. Word has length 49 [2021-11-07 01:14:04,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:04,288 INFO L470 AbstractCegarLoop]: Abstraction has 1095 states and 1873 transitions. [2021-11-07 01:14:04,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:04,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1873 transitions. [2021-11-07 01:14:04,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:14:04,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:04,291 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:04,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:04,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:04,506 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:14:04,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:04,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1226904469, now seen corresponding path program 1 times [2021-11-07 01:14:04,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:04,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375471022] [2021-11-07 01:14:04,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:04,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:04,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:04,509 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:04,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:14:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:04,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:04,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:05,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:05,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:05,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375471022] [2021-11-07 01:14:05,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375471022] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:05,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:05,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:14:05,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293940011] [2021-11-07 01:14:05,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:14:05,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:05,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:14:05,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:14:05,291 INFO L87 Difference]: Start difference. First operand 1095 states and 1873 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 01:14:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:05,743 INFO L93 Difference]: Finished difference Result 4297 states and 7354 transitions. [2021-11-07 01:14:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:14:05,743 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 01:14:05,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:05,764 INFO L225 Difference]: With dead ends: 4297 [2021-11-07 01:14:05,764 INFO L226 Difference]: Without dead ends: 3220 [2021-11-07 01:14:05,767 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 01:14:05,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-11-07 01:14:05,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 1094. [2021-11-07 01:14:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1088 states have (on average 1.7178308823529411) internal successors, (1869), 1093 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1869 transitions. [2021-11-07 01:14:05,853 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1869 transitions. Word has length 51 [2021-11-07 01:14:05,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:05,853 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1869 transitions. [2021-11-07 01:14:05,853 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 01:14:05,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1869 transitions. [2021-11-07 01:14:05,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:14:05,855 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:05,855 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:05,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:06,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:06,076 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:14:06,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:06,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1363845118, now seen corresponding path program 1 times [2021-11-07 01:14:06,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:06,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127036690] [2021-11-07 01:14:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:06,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:06,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:06,082 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:06,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:14:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:06,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:14:06,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:06,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:06,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:06,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127036690] [2021-11-07 01:14:06,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127036690] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:06,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:06,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:14:06,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956947556] [2021-11-07 01:14:06,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:14:06,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:06,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:14:06,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:14:06,835 INFO L87 Difference]: Start difference. First operand 1094 states and 1869 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:06,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:06,952 INFO L93 Difference]: Finished difference Result 2185 states and 3735 transitions. [2021-11-07 01:14:06,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:14:06,953 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 01:14:06,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:06,959 INFO L225 Difference]: With dead ends: 2185 [2021-11-07 01:14:06,960 INFO L226 Difference]: Without dead ends: 1099 [2021-11-07 01:14:06,962 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 01:14:06,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-11-07 01:14:07,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 1094. [2021-11-07 01:14:07,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1088 states have (on average 1.7150735294117647) internal successors, (1866), 1093 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:07,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1866 transitions. [2021-11-07 01:14:07,035 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1866 transitions. Word has length 52 [2021-11-07 01:14:07,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:07,036 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1866 transitions. [2021-11-07 01:14:07,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:07,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1866 transitions. [2021-11-07 01:14:07,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:14:07,038 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:07,038 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:07,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:07,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:07,252 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:14:07,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:07,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2025560237, now seen corresponding path program 1 times [2021-11-07 01:14:07,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:07,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959009333] [2021-11-07 01:14:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:07,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:07,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:07,255 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:07,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:14:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:07,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:07,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:07,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:08,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:08,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959009333] [2021-11-07 01:14:08,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959009333] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:08,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:08,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:14:08,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094473900] [2021-11-07 01:14:08,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:14:08,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:08,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:14:08,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:14:08,039 INFO L87 Difference]: Start difference. First operand 1094 states and 1866 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 01:14:08,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:08,456 INFO L93 Difference]: Finished difference Result 4284 states and 7330 transitions. [2021-11-07 01:14:08,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:14:08,457 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 01:14:08,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:08,476 INFO L225 Difference]: With dead ends: 4284 [2021-11-07 01:14:08,477 INFO L226 Difference]: Without dead ends: 3216 [2021-11-07 01:14:08,479 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 01:14:08,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3216 states. [2021-11-07 01:14:08,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3216 to 1094. [2021-11-07 01:14:08,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1088 states have (on average 1.7123161764705883) internal successors, (1863), 1093 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:08,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1863 transitions. [2021-11-07 01:14:08,580 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1863 transitions. Word has length 53 [2021-11-07 01:14:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:08,581 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1863 transitions. [2021-11-07 01:14:08,581 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 01:14:08,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1863 transitions. [2021-11-07 01:14:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:14:08,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:08,583 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:08,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:08,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:08,797 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:14:08,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:08,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1584433074, now seen corresponding path program 1 times [2021-11-07 01:14:08,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:08,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589306143] [2021-11-07 01:14:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:08,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:08,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:08,801 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:08,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:14:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:09,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:09,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:09,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:09,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:09,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589306143] [2021-11-07 01:14:09,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589306143] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:09,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:09,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:14:09,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081760309] [2021-11-07 01:14:09,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:14:09,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:09,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:14:09,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:14:09,632 INFO L87 Difference]: Start difference. First operand 1094 states and 1863 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 01:14:09,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:09,826 INFO L93 Difference]: Finished difference Result 2969 states and 5047 transitions. [2021-11-07 01:14:09,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:14:09,827 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 01:14:09,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:09,841 INFO L225 Difference]: With dead ends: 2969 [2021-11-07 01:14:09,841 INFO L226 Difference]: Without dead ends: 2162 [2021-11-07 01:14:09,843 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 01:14:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-11-07 01:14:09,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1355. [2021-11-07 01:14:09,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1349 states have (on average 1.736842105263158) internal successors, (2343), 1354 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:09,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 2343 transitions. [2021-11-07 01:14:09,972 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 2343 transitions. Word has length 55 [2021-11-07 01:14:09,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:09,972 INFO L470 AbstractCegarLoop]: Abstraction has 1355 states and 2343 transitions. [2021-11-07 01:14:09,972 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 01:14:09,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 2343 transitions. [2021-11-07 01:14:09,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:14:09,975 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:09,975 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:09,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:10,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:10,193 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:14:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:10,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1824225665, now seen corresponding path program 1 times [2021-11-07 01:14:10,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:10,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990149588] [2021-11-07 01:14:10,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:10,195 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:10,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:10,196 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:10,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:14:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:10,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:10,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:10,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:11,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:11,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990149588] [2021-11-07 01:14:11,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990149588] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:11,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:11,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:11,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399865807] [2021-11-07 01:14:11,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:11,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:11,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:11,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:11,057 INFO L87 Difference]: Start difference. First operand 1355 states and 2343 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:11,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:11,257 INFO L93 Difference]: Finished difference Result 3642 states and 6288 transitions. [2021-11-07 01:14:11,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:11,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:14:11,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:11,272 INFO L225 Difference]: With dead ends: 3642 [2021-11-07 01:14:11,272 INFO L226 Difference]: Without dead ends: 2371 [2021-11-07 01:14:11,275 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-11-07 01:14:11,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1564. [2021-11-07 01:14:11,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1558 states have (on average 1.7496790757381258) internal successors, (2726), 1563 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:11,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2726 transitions. [2021-11-07 01:14:11,412 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2726 transitions. Word has length 67 [2021-11-07 01:14:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:11,414 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 2726 transitions. [2021-11-07 01:14:11,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:11,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2726 transitions. [2021-11-07 01:14:11,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:14:11,417 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:11,417 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:11,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:11,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:11,632 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:14:11,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:11,632 INFO L85 PathProgramCache]: Analyzing trace with hash 847878878, now seen corresponding path program 1 times [2021-11-07 01:14:11,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:11,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170441430] [2021-11-07 01:14:11,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:11,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:11,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:11,635 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:11,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:14:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:12,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:12,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:12,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:12,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:12,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170441430] [2021-11-07 01:14:12,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170441430] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:12,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:12,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:12,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433956378] [2021-11-07 01:14:12,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:12,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:12,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:12,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:12,504 INFO L87 Difference]: Start difference. First operand 1564 states and 2726 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:12,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:12,738 INFO L93 Difference]: Finished difference Result 4301 states and 7502 transitions. [2021-11-07 01:14:12,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:12,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:14:12,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:12,757 INFO L225 Difference]: With dead ends: 4301 [2021-11-07 01:14:12,757 INFO L226 Difference]: Without dead ends: 2829 [2021-11-07 01:14:12,760 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:12,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2021-11-07 01:14:12,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 2022. [2021-11-07 01:14:12,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2016 states have (on average 1.7698412698412698) internal successors, (3568), 2021 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 3568 transitions. [2021-11-07 01:14:12,959 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 3568 transitions. Word has length 68 [2021-11-07 01:14:12,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:12,959 INFO L470 AbstractCegarLoop]: Abstraction has 2022 states and 3568 transitions. [2021-11-07 01:14:12,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:12,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 3568 transitions. [2021-11-07 01:14:12,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:14:12,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:12,963 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:12,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:13,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:13,179 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:14:13,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:13,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1109431379, now seen corresponding path program 1 times [2021-11-07 01:14:13,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:13,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395497274] [2021-11-07 01:14:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:13,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:13,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:13,181 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:13,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:14:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:13,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:13,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:13,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:14,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:14,078 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:14,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395497274] [2021-11-07 01:14:14,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395497274] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:14,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:14,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:14,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149973844] [2021-11-07 01:14:14,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:14,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:14,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:14,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:14,080 INFO L87 Difference]: Start difference. First operand 2022 states and 3568 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:14,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:14,377 INFO L93 Difference]: Finished difference Result 5655 states and 9997 transitions. [2021-11-07 01:14:14,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:14,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:14:14,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:14,400 INFO L225 Difference]: With dead ends: 5655 [2021-11-07 01:14:14,400 INFO L226 Difference]: Without dead ends: 3733 [2021-11-07 01:14:14,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:14,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3733 states. [2021-11-07 01:14:14,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3733 to 2926. [2021-11-07 01:14:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2926 states, 2920 states have (on average 1.7914383561643836) internal successors, (5231), 2925 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 5231 transitions. [2021-11-07 01:14:14,663 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 5231 transitions. Word has length 69 [2021-11-07 01:14:14,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:14,664 INFO L470 AbstractCegarLoop]: Abstraction has 2926 states and 5231 transitions. [2021-11-07 01:14:14,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:14,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 5231 transitions. [2021-11-07 01:14:14,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:14:14,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:14,675 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:14,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:14,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:14,891 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:14:14,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:14,892 INFO L85 PathProgramCache]: Analyzing trace with hash 679151917, now seen corresponding path program 1 times [2021-11-07 01:14:14,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:14,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451365999] [2021-11-07 01:14:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:14,894 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:14,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:14,895 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:14,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:14:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:15,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:15,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:15,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:15,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:15,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451365999] [2021-11-07 01:14:15,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451365999] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:15,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:15,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:15,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166388097] [2021-11-07 01:14:15,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:15,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:15,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:15,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:15,739 INFO L87 Difference]: Start difference. First operand 2926 states and 5231 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:16,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:16,069 INFO L93 Difference]: Finished difference Result 8103 states and 14505 transitions. [2021-11-07 01:14:16,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:16,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:14:16,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:16,115 INFO L225 Difference]: With dead ends: 8103 [2021-11-07 01:14:16,115 INFO L226 Difference]: Without dead ends: 5311 [2021-11-07 01:14:16,120 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:16,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5311 states. [2021-11-07 01:14:16,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5311 to 4504. [2021-11-07 01:14:16,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4504 states, 4498 states have (on average 1.8079146287238772) internal successors, (8132), 4503 states have internal predecessors, (8132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:16,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4504 states to 4504 states and 8132 transitions. [2021-11-07 01:14:16,463 INFO L78 Accepts]: Start accepts. Automaton has 4504 states and 8132 transitions. Word has length 70 [2021-11-07 01:14:16,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:16,463 INFO L470 AbstractCegarLoop]: Abstraction has 4504 states and 8132 transitions. [2021-11-07 01:14:16,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:16,464 INFO L276 IsEmpty]: Start isEmpty. Operand 4504 states and 8132 transitions. [2021-11-07 01:14:16,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:14:16,470 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:16,470 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:16,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:16,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:16,684 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:14:16,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:16,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1296564898, now seen corresponding path program 1 times [2021-11-07 01:14:16,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:16,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632400898] [2021-11-07 01:14:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:16,685 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:16,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:16,686 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:16,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:14:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:17,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:17,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:17,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:17,502 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:17,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632400898] [2021-11-07 01:14:17,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632400898] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:17,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:17,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:17,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891103656] [2021-11-07 01:14:17,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:17,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:17,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:17,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:17,504 INFO L87 Difference]: Start difference. First operand 4504 states and 8132 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:17,944 INFO L93 Difference]: Finished difference Result 12553 states and 22691 transitions. [2021-11-07 01:14:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:17,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:14:17,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:17,967 INFO L225 Difference]: With dead ends: 12553 [2021-11-07 01:14:17,967 INFO L226 Difference]: Without dead ends: 8217 [2021-11-07 01:14:17,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:17,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8217 states. [2021-11-07 01:14:18,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8217 to 7410. [2021-11-07 01:14:18,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7404 states have (on average 1.819151809832523) internal successors, (13469), 7409 states have internal predecessors, (13469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:18,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 13469 transitions. [2021-11-07 01:14:18,481 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 13469 transitions. Word has length 71 [2021-11-07 01:14:18,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:18,481 INFO L470 AbstractCegarLoop]: Abstraction has 7410 states and 13469 transitions. [2021-11-07 01:14:18,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:18,482 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 13469 transitions. [2021-11-07 01:14:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:14:18,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:18,489 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:18,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:18,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:18,707 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:14:18,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:18,708 INFO L85 PathProgramCache]: Analyzing trace with hash -950908482, now seen corresponding path program 1 times [2021-11-07 01:14:18,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:18,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929567677] [2021-11-07 01:14:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:18,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:18,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:18,709 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:18,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:14:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:19,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:19,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:19,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:19,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:19,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929567677] [2021-11-07 01:14:19,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929567677] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:19,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:19,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:19,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605969785] [2021-11-07 01:14:19,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:19,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:19,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:19,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:19,577 INFO L87 Difference]: Start difference. First operand 7410 states and 13469 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:20,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:20,068 INFO L93 Difference]: Finished difference Result 21597 states and 39313 transitions. [2021-11-07 01:14:20,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:20,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:14:20,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:20,106 INFO L225 Difference]: With dead ends: 21597 [2021-11-07 01:14:20,106 INFO L226 Difference]: Without dead ends: 14363 [2021-11-07 01:14:20,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:20,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14363 states. [2021-11-07 01:14:20,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14363 to 13556. [2021-11-07 01:14:20,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13556 states, 13550 states have (on average 1.8265682656826567) internal successors, (24750), 13555 states have internal predecessors, (24750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13556 states to 13556 states and 24750 transitions. [2021-11-07 01:14:20,900 INFO L78 Accepts]: Start accepts. Automaton has 13556 states and 24750 transitions. Word has length 72 [2021-11-07 01:14:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:20,900 INFO L470 AbstractCegarLoop]: Abstraction has 13556 states and 24750 transitions. [2021-11-07 01:14:20,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:20,901 INFO L276 IsEmpty]: Start isEmpty. Operand 13556 states and 24750 transitions. [2021-11-07 01:14:20,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:14:20,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:20,911 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 01:14:20,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:21,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:21,125 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:14:21,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:21,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1214959342, now seen corresponding path program 1 times [2021-11-07 01:14:21,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:21,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503311577] [2021-11-07 01:14:21,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:21,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:21,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:21,128 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:21,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:14:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:21,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:14:21,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:14:21,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:14:22,163 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:22,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503311577] [2021-11-07 01:14:22,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503311577] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:22,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:22,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:14:22,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425574579] [2021-11-07 01:14:22,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:14:22,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:22,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:14:22,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:14:22,166 INFO L87 Difference]: Start difference. First operand 13556 states and 24750 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 01:14:25,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:25,208 INFO L93 Difference]: Finished difference Result 33765 states and 61615 transitions. [2021-11-07 01:14:25,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:14:25,209 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 01:14:25,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:25,259 INFO L225 Difference]: With dead ends: 33765 [2021-11-07 01:14:25,260 INFO L226 Difference]: Without dead ends: 20506 [2021-11-07 01:14:25,276 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 01:14:25,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20506 states. [2021-11-07 01:14:26,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20506 to 13523. [2021-11-07 01:14:26,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13523 states, 13517 states have (on average 1.8212621143744914) internal successors, (24618), 13522 states have internal predecessors, (24618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:26,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13523 states to 13523 states and 24618 transitions. [2021-11-07 01:14:26,091 INFO L78 Accepts]: Start accepts. Automaton has 13523 states and 24618 transitions. Word has length 73 [2021-11-07 01:14:26,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:26,091 INFO L470 AbstractCegarLoop]: Abstraction has 13523 states and 24618 transitions. [2021-11-07 01:14:26,091 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 01:14:26,092 INFO L276 IsEmpty]: Start isEmpty. Operand 13523 states and 24618 transitions. [2021-11-07 01:14:26,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:14:26,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:26,103 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:26,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:26,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:26,317 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:14:26,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:26,318 INFO L85 PathProgramCache]: Analyzing trace with hash -25215795, now seen corresponding path program 1 times [2021-11-07 01:14:26,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:26,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101502802] [2021-11-07 01:14:26,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:26,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:26,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:26,320 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:26,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:14:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:26,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:26,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:27,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:27,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:27,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101502802] [2021-11-07 01:14:27,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101502802] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:27,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:27,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:27,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372040980] [2021-11-07 01:14:27,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:27,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:27,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:27,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:27,285 INFO L87 Difference]: Start difference. First operand 13523 states and 24618 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:28,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:28,489 INFO L93 Difference]: Finished difference Result 39768 states and 72467 transitions. [2021-11-07 01:14:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:28,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:14:28,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:28,541 INFO L225 Difference]: With dead ends: 39768 [2021-11-07 01:14:28,542 INFO L226 Difference]: Without dead ends: 26428 [2021-11-07 01:14:28,558 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:28,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26428 states. [2021-11-07 01:14:29,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26428 to 25621. [2021-11-07 01:14:29,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25621 states, 25615 states have (on average 1.8243607261370292) internal successors, (46731), 25620 states have internal predecessors, (46731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:29,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25621 states to 25621 states and 46731 transitions. [2021-11-07 01:14:29,840 INFO L78 Accepts]: Start accepts. Automaton has 25621 states and 46731 transitions. Word has length 73 [2021-11-07 01:14:29,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:29,841 INFO L470 AbstractCegarLoop]: Abstraction has 25621 states and 46731 transitions. [2021-11-07 01:14:29,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:29,841 INFO L276 IsEmpty]: Start isEmpty. Operand 25621 states and 46731 transitions. [2021-11-07 01:14:29,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:14:29,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:29,851 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:29,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:30,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:30,070 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:14:30,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:30,071 INFO L85 PathProgramCache]: Analyzing trace with hash 136941453, now seen corresponding path program 1 times [2021-11-07 01:14:30,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:30,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957544371] [2021-11-07 01:14:30,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:30,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:30,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:30,073 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:30,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:14:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:30,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:30,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:30,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:31,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:31,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957544371] [2021-11-07 01:14:31,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957544371] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:31,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:31,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:31,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550170913] [2021-11-07 01:14:31,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:31,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:31,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:31,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:31,085 INFO L87 Difference]: Start difference. First operand 25621 states and 46731 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:33,122 INFO L93 Difference]: Finished difference Result 70701 states and 128542 transitions. [2021-11-07 01:14:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:33,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:14:33,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:33,189 INFO L225 Difference]: With dead ends: 70701 [2021-11-07 01:14:33,190 INFO L226 Difference]: Without dead ends: 45310 [2021-11-07 01:14:33,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:33,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45310 states. [2021-11-07 01:14:35,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45310 to 44503. [2021-11-07 01:14:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44503 states, 44497 states have (on average 1.8139649864035778) internal successors, (80716), 44502 states have internal predecessors, (80716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44503 states to 44503 states and 80716 transitions. [2021-11-07 01:14:35,467 INFO L78 Accepts]: Start accepts. Automaton has 44503 states and 80716 transitions. Word has length 74 [2021-11-07 01:14:35,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:35,467 INFO L470 AbstractCegarLoop]: Abstraction has 44503 states and 80716 transitions. [2021-11-07 01:14:35,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 44503 states and 80716 transitions. [2021-11-07 01:14:35,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:14:35,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:35,482 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 01:14:35,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:35,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:35,687 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:14:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:35,688 INFO L85 PathProgramCache]: Analyzing trace with hash 903328948, now seen corresponding path program 1 times [2021-11-07 01:14:35,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:35,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655377837] [2021-11-07 01:14:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:35,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:35,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:35,690 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:35,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:14:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:36,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:14:36,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:14:36,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:14:37,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:37,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655377837] [2021-11-07 01:14:37,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655377837] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:37,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:37,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:14:37,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468666853] [2021-11-07 01:14:37,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:14:37,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:37,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:14:37,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:14:37,033 INFO L87 Difference]: Start difference. First operand 44503 states and 80716 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 01:14:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:44,020 INFO L93 Difference]: Finished difference Result 173280 states and 314165 transitions. [2021-11-07 01:14:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:14:44,021 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 01:14:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:44,454 INFO L225 Difference]: With dead ends: 173280 [2021-11-07 01:14:44,454 INFO L226 Difference]: Without dead ends: 129073 [2021-11-07 01:14:44,507 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 01:14:44,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129073 states. [2021-11-07 01:14:47,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129073 to 44245. [2021-11-07 01:14:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44245 states, 44239 states have (on average 1.8012161215217342) internal successors, (79684), 44244 states have internal predecessors, (79684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:47,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44245 states to 44245 states and 79684 transitions. [2021-11-07 01:14:47,889 INFO L78 Accepts]: Start accepts. Automaton has 44245 states and 79684 transitions. Word has length 75 [2021-11-07 01:14:47,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:47,889 INFO L470 AbstractCegarLoop]: Abstraction has 44245 states and 79684 transitions. [2021-11-07 01:14:47,889 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 01:14:47,889 INFO L276 IsEmpty]: Start isEmpty. Operand 44245 states and 79684 transitions. [2021-11-07 01:14:47,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:14:47,896 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:47,896 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 01:14:47,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:48,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:48,097 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:14:48,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:48,097 INFO L85 PathProgramCache]: Analyzing trace with hash 947718738, now seen corresponding path program 1 times [2021-11-07 01:14:48,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:48,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175676558] [2021-11-07 01:14:48,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:48,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:48,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:48,098 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:48,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:14:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:48,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:48,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:48,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:49,182 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:49,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175676558] [2021-11-07 01:14:49,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175676558] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:49,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:49,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:14:49,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303100114] [2021-11-07 01:14:49,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:14:49,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:49,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:14:49,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:14:49,184 INFO L87 Difference]: Start difference. First operand 44245 states and 79684 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 01:14:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:51,446 INFO L93 Difference]: Finished difference Result 88995 states and 160210 transitions. [2021-11-07 01:14:51,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:51,446 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 01:14:51,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:51,524 INFO L225 Difference]: With dead ends: 88995 [2021-11-07 01:14:51,524 INFO L226 Difference]: Without dead ends: 45052 [2021-11-07 01:14:51,551 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 01:14:51,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45052 states. [2021-11-07 01:14:53,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45052 to 44245. [2021-11-07 01:14:53,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44245 states, 44239 states have (on average 1.7983227468975338) internal successors, (79556), 44244 states have internal predecessors, (79556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:53,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44245 states to 44245 states and 79556 transitions. [2021-11-07 01:14:53,833 INFO L78 Accepts]: Start accepts. Automaton has 44245 states and 79556 transitions. Word has length 75 [2021-11-07 01:14:53,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:53,833 INFO L470 AbstractCegarLoop]: Abstraction has 44245 states and 79556 transitions. [2021-11-07 01:14:53,833 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 01:14:53,833 INFO L276 IsEmpty]: Start isEmpty. Operand 44245 states and 79556 transitions. [2021-11-07 01:14:53,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:14:53,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:53,841 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:53,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:54,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:54,042 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:14:54,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:54,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1512720705, now seen corresponding path program 1 times [2021-11-07 01:14:54,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:54,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951798842] [2021-11-07 01:14:54,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:54,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:54,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:54,044 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:54,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85946aea-5120-4f13-bd21-68e01633b85f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:14:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:54,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:54,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:55,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:55,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:55,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951798842] [2021-11-07 01:14:55,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951798842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:55,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:55,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:55,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341307489] [2021-11-07 01:14:55,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:55,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:55,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:55,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:55,248 INFO L87 Difference]: Start difference. First operand 44245 states and 79556 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)