./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec9_product22.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_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/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_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/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_1bb9ae21-7315-4f09-9cff-091d03887bcd/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 0fc665e3899dd29ca5bf696fac98a46e2d1733c214ee43bc57c8fd7a101d2539 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:48:01,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:48:01,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:48:01,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:48:01,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:48:01,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:48:01,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:48:01,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:48:01,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:48:01,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:48:01,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:48:01,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:48:01,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:48:01,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:48:01,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:48:01,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:48:01,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:48:01,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:48:01,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:48:01,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:48:01,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:48:01,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:48:01,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:48:01,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:48:01,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:48:01,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:48:01,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:48:01,645 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:48:01,646 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:48:01,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:48:01,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:48:01,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:48:01,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:48:01,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:48:01,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:48:01,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:48:01,655 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:48:01,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:48:01,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:48:01,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:48:01,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:48:01,660 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:48:01,689 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:48:01,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:48:01,690 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:48:01,690 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:48:01,691 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:48:01,691 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:48:01,691 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:48:01,691 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:48:01,692 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:48:01,692 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:48:01,692 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:48:01,692 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:48:01,693 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:48:01,693 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:48:01,693 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:48:01,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:48:01,694 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:48:01,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:48:01,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:48:01,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:48:01,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:48:01,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:48:01,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:48:01,696 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:48:01,696 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:48:01,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:48:01,697 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:48:01,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:48:01,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:48:01,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:48:01,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:48:01,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:48:01,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:48:01,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:48:01,699 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:48:01,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:48:01,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:48:01,700 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:48:01,700 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:48:01,700 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_1bb9ae21-7315-4f09-9cff-091d03887bcd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0fc665e3899dd29ca5bf696fac98a46e2d1733c214ee43bc57c8fd7a101d2539 [2021-11-07 01:48:02,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:48:02,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:48:02,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:48:02,114 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:48:02,115 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:48:02,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product22.cil.c [2021-11-07 01:48:02,206 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/data/06a931eff/d758a5032033429eb8db17fbfd77e1e8/FLAGace6a3942 [2021-11-07 01:48:03,075 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:48:03,075 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/sv-benchmarks/c/product-lines/email_spec9_product22.cil.c [2021-11-07 01:48:03,104 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/data/06a931eff/d758a5032033429eb8db17fbfd77e1e8/FLAGace6a3942 [2021-11-07 01:48:03,220 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/data/06a931eff/d758a5032033429eb8db17fbfd77e1e8 [2021-11-07 01:48:03,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:48:03,225 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:48:03,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:03,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:48:03,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:48:03,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:03" (1/1) ... [2021-11-07 01:48:03,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30c387c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:03, skipping insertion in model container [2021-11-07 01:48:03,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:03" (1/1) ... [2021-11-07 01:48:03,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:48:03,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:04,062 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_1bb9ae21-7315-4f09-9cff-091d03887bcd/sv-benchmarks/c/product-lines/email_spec9_product22.cil.c[51984,51997] [2021-11-07 01:48:04,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:04,169 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 01:48:04,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@56936932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:04, skipping insertion in model container [2021-11-07 01:48:04,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:04,171 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:48:04,174 INFO L168 Benchmark]: Toolchain (without parser) took 947.43 ms. Allocated memory is still 113.2 MB. Free memory was 72.4 MB in the beginning and 72.0 MB in the end (delta: 450.1 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:04,176 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 113.2 MB. Free memory was 85.1 MB in the beginning and 85.0 MB in the end (delta: 26.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:48:04,178 INFO L168 Benchmark]: CACSL2BoogieTranslator took 941.34 ms. Allocated memory is still 113.2 MB. Free memory was 72.4 MB in the beginning and 72.0 MB in the end (delta: 378.3 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:04,181 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 113.2 MB. Free memory was 85.1 MB in the beginning and 85.0 MB in the end (delta: 26.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 941.34 ms. Allocated memory is still 113.2 MB. Free memory was 72.4 MB in the beginning and 72.0 MB in the end (delta: 378.3 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2517]: 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_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/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_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/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_1bb9ae21-7315-4f09-9cff-091d03887bcd/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 0fc665e3899dd29ca5bf696fac98a46e2d1733c214ee43bc57c8fd7a101d2539 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:48:06,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:48:06,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:48:06,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:48:06,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:48:06,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:48:06,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:48:06,851 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:48:06,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:48:06,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:48:06,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:48:06,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:48:06,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:48:06,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:48:06,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:48:06,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:48:06,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:48:06,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:48:06,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:48:06,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:48:06,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:48:06,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:48:06,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:48:06,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:48:06,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:48:06,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:48:06,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:48:06,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:48:06,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:48:06,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:48:06,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:48:06,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:48:06,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:48:06,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:48:06,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:48:06,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:48:06,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:48:06,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:48:06,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:48:06,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:48:06,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:48:06,919 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:48:06,950 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:48:06,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:48:06,951 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:48:06,951 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:48:06,952 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:48:06,952 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:48:06,952 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:48:06,953 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:48:06,953 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:48:06,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:48:06,954 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:48:06,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:48:06,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:48:06,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:48:06,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:48:06,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:48:06,956 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:48:06,957 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:48:06,957 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:48:06,957 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:48:06,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:48:06,958 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:48:06,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:48:06,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:48:06,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:48:06,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:48:06,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:48:06,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:48:06,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:48:06,961 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:48:06,961 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:48:06,961 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:06,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:48:06,962 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:48:06,962 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:48:06,962 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_1bb9ae21-7315-4f09-9cff-091d03887bcd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0fc665e3899dd29ca5bf696fac98a46e2d1733c214ee43bc57c8fd7a101d2539 [2021-11-07 01:48:07,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:48:07,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:48:07,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:48:07,387 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:48:07,387 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:48:07,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product22.cil.c [2021-11-07 01:48:07,479 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/data/57ffe2666/17e3751ee89d441e8e356153481614b6/FLAG9780c490b [2021-11-07 01:48:08,275 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:48:08,277 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/sv-benchmarks/c/product-lines/email_spec9_product22.cil.c [2021-11-07 01:48:08,307 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/data/57ffe2666/17e3751ee89d441e8e356153481614b6/FLAG9780c490b [2021-11-07 01:48:08,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/data/57ffe2666/17e3751ee89d441e8e356153481614b6 [2021-11-07 01:48:08,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:48:08,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:48:08,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:08,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:48:08,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:48:08,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:08" (1/1) ... [2021-11-07 01:48:08,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa38fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:08, skipping insertion in model container [2021-11-07 01:48:08,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:08" (1/1) ... [2021-11-07 01:48:08,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:48:08,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:09,224 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_1bb9ae21-7315-4f09-9cff-091d03887bcd/sv-benchmarks/c/product-lines/email_spec9_product22.cil.c[51984,51997] [2021-11-07 01:48:09,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:09,329 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:48:09,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:09,450 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_1bb9ae21-7315-4f09-9cff-091d03887bcd/sv-benchmarks/c/product-lines/email_spec9_product22.cil.c[51984,51997] [2021-11-07 01:48:09,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:09,493 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:48:09,573 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_1bb9ae21-7315-4f09-9cff-091d03887bcd/sv-benchmarks/c/product-lines/email_spec9_product22.cil.c[51984,51997] [2021-11-07 01:48:09,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:09,661 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:48:09,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:09 WrapperNode [2021-11-07 01:48:09,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:09,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:48:09,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:48:09,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:48:09,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:09" (1/1) ... [2021-11-07 01:48:09,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:09" (1/1) ... [2021-11-07 01:48:09,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:48:09,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:48:09,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:48:09,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:48:09,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:09" (1/1) ... [2021-11-07 01:48:09,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:09" (1/1) ... [2021-11-07 01:48:09,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:09" (1/1) ... [2021-11-07 01:48:09,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:09" (1/1) ... [2021-11-07 01:48:09,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:09" (1/1) ... [2021-11-07 01:48:09,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:09" (1/1) ... [2021-11-07 01:48:09,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:09" (1/1) ... [2021-11-07 01:48:10,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:48:10,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:48:10,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:48:10,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:48:10,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:09" (1/1) ... [2021-11-07 01:48:10,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:48:10,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:48:10,060 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:48:10,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:48:10,133 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:48:10,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:48:10,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:48:10,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:48:10,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:48:14,994 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:48:14,994 INFO L299 CfgBuilder]: Removed 323 assume(true) statements. [2021-11-07 01:48:14,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:48:14 BoogieIcfgContainer [2021-11-07 01:48:14,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:48:15,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:48:15,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:48:15,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:48:15,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:48:08" (1/3) ... [2021-11-07 01:48:15,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62eb6bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:48:15, skipping insertion in model container [2021-11-07 01:48:15,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:09" (2/3) ... [2021-11-07 01:48:15,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62eb6bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:48:15, skipping insertion in model container [2021-11-07 01:48:15,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:48:14" (3/3) ... [2021-11-07 01:48:15,008 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec9_product22.cil.c [2021-11-07 01:48:15,014 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:48:15,014 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:48:15,075 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:48:15,082 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 01:48:15,082 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:48:15,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 479 states, 476 states have (on average 1.7415966386554622) internal successors, (829), 478 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:15,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:48:15,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:15,130 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:15,131 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:15,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:15,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1963774830, now seen corresponding path program 1 times [2021-11-07 01:48:15,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:15,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1714897423] [2021-11-07 01:48:15,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:15,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:15,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:15,162 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:15,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:48:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:15,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:48:15,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:15,876 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 01:48:15,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:15,992 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 01:48:15,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:15,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1714897423] [2021-11-07 01:48:15,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1714897423] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:15,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:15,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:48:15,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883898207] [2021-11-07 01:48:16,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:48:16,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:16,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:48:16,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:48:16,029 INFO L87 Difference]: Start difference. First operand has 479 states, 476 states have (on average 1.7415966386554622) internal successors, (829), 478 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:16,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:16,118 INFO L93 Difference]: Finished difference Result 712 states and 1210 transitions. [2021-11-07 01:48:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:48:16,120 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 01:48:16,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:16,139 INFO L225 Difference]: With dead ends: 712 [2021-11-07 01:48:16,140 INFO L226 Difference]: Without dead ends: 401 [2021-11-07 01:48:16,145 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 80 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 01:48:16,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-07 01:48:16,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2021-11-07 01:48:16,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 399 states have (on average 1.7468671679197996) internal successors, (697), 400 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 697 transitions. [2021-11-07 01:48:16,226 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 697 transitions. Word has length 41 [2021-11-07 01:48:16,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:16,227 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 697 transitions. [2021-11-07 01:48:16,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 697 transitions. [2021-11-07 01:48:16,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 01:48:16,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:16,234 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] [2021-11-07 01:48:16,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:16,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:16,450 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:16,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:16,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1855386875, now seen corresponding path program 1 times [2021-11-07 01:48:16,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:16,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105409690] [2021-11-07 01:48:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:16,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:16,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:16,455 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:16,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:48:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:16,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:48:16,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:17,033 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 01:48:17,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:17,188 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 01:48:17,188 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:17,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105409690] [2021-11-07 01:48:17,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105409690] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:17,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:17,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:48:17,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418175699] [2021-11-07 01:48:17,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:17,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:17,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:17,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:17,193 INFO L87 Difference]: Start difference. First operand 401 states and 697 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:17,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:17,328 INFO L93 Difference]: Finished difference Result 1173 states and 2043 transitions. [2021-11-07 01:48:17,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:48:17,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-07 01:48:17,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:17,339 INFO L225 Difference]: With dead ends: 1173 [2021-11-07 01:48:17,339 INFO L226 Difference]: Without dead ends: 787 [2021-11-07 01:48:17,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 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 01:48:17,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-11-07 01:48:17,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 400. [2021-11-07 01:48:17,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 398 states have (on average 1.7386934673366834) internal successors, (692), 399 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 692 transitions. [2021-11-07 01:48:17,423 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 692 transitions. Word has length 42 [2021-11-07 01:48:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:17,424 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 692 transitions. [2021-11-07 01:48:17,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 692 transitions. [2021-11-07 01:48:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:48:17,445 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:17,446 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:17,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:17,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:17,663 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:17,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:17,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1651061153, now seen corresponding path program 1 times [2021-11-07 01:48:17,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:17,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255566578] [2021-11-07 01:48:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:17,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:17,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:17,676 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:17,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:48:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:18,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:48:18,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:18,213 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 01:48:18,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:18,340 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 01:48:18,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:18,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255566578] [2021-11-07 01:48:18,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255566578] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:18,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:18,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:48:18,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687090072] [2021-11-07 01:48:18,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:48:18,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:18,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:48:18,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:48:18,349 INFO L87 Difference]: Start difference. First operand 400 states and 692 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:18,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:18,630 INFO L93 Difference]: Finished difference Result 1517 states and 2630 transitions. [2021-11-07 01:48:18,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:48:18,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:48:18,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:18,642 INFO L225 Difference]: With dead ends: 1517 [2021-11-07 01:48:18,642 INFO L226 Difference]: Without dead ends: 1135 [2021-11-07 01:48:18,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 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 01:48:18,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-11-07 01:48:18,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 399. [2021-11-07 01:48:18,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 397 states have (on average 1.7329974811083124) internal successors, (688), 398 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:18,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 688 transitions. [2021-11-07 01:48:18,692 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 688 transitions. Word has length 44 [2021-11-07 01:48:18,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:18,693 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 688 transitions. [2021-11-07 01:48:18,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:18,695 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 688 transitions. [2021-11-07 01:48:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:48:18,696 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:18,697 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:18,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:18,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:18,913 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:18,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:18,914 INFO L85 PathProgramCache]: Analyzing trace with hash -757093844, now seen corresponding path program 1 times [2021-11-07 01:48:18,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:18,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179375709] [2021-11-07 01:48:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:18,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:18,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:18,921 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:18,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:48:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:19,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:48:19,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:19,515 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 01:48:19,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:19,650 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 01:48:19,650 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:19,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179375709] [2021-11-07 01:48:19,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179375709] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:19,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:19,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:48:19,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758999245] [2021-11-07 01:48:19,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:19,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:19,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:19,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:19,653 INFO L87 Difference]: Start difference. First operand 399 states and 688 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 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 01:48:19,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:19,729 INFO L93 Difference]: Finished difference Result 795 states and 1373 transitions. [2021-11-07 01:48:19,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:48:19,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 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 45 [2021-11-07 01:48:19,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:19,733 INFO L225 Difference]: With dead ends: 795 [2021-11-07 01:48:19,733 INFO L226 Difference]: Without dead ends: 404 [2021-11-07 01:48:19,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:19,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-11-07 01:48:19,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 399. [2021-11-07 01:48:19,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 397 states have (on average 1.7254408060453401) internal successors, (685), 398 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:19,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 685 transitions. [2021-11-07 01:48:19,765 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 685 transitions. Word has length 45 [2021-11-07 01:48:19,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:19,766 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 685 transitions. [2021-11-07 01:48:19,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 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 01:48:19,766 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 685 transitions. [2021-11-07 01:48:19,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:48:19,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:19,767 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] [2021-11-07 01:48:19,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:19,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:19,982 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:19,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:19,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1603291255, now seen corresponding path program 1 times [2021-11-07 01:48:19,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:19,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189605058] [2021-11-07 01:48:19,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:19,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:19,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:19,985 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:19,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:48:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:20,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:48:20,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:20,608 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 01:48:20,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:20,748 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 01:48:20,748 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:20,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189605058] [2021-11-07 01:48:20,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189605058] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:20,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:20,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:48:20,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667617984] [2021-11-07 01:48:20,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:48:20,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:20,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:48:20,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:48:20,750 INFO L87 Difference]: Start difference. First operand 399 states and 685 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:21,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:21,024 INFO L93 Difference]: Finished difference Result 1504 states and 2606 transitions. [2021-11-07 01:48:21,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:48:21,025 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 01:48:21,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:21,033 INFO L225 Difference]: With dead ends: 1504 [2021-11-07 01:48:21,033 INFO L226 Difference]: Without dead ends: 1131 [2021-11-07 01:48:21,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 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 01:48:21,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-11-07 01:48:21,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 399. [2021-11-07 01:48:21,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 397 states have (on average 1.7178841309823678) internal successors, (682), 398 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:21,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 682 transitions. [2021-11-07 01:48:21,075 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 682 transitions. Word has length 46 [2021-11-07 01:48:21,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:21,075 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 682 transitions. [2021-11-07 01:48:21,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:21,076 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 682 transitions. [2021-11-07 01:48:21,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:48:21,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:21,077 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 01:48:21,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:21,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:21,291 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:21,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:21,291 INFO L85 PathProgramCache]: Analyzing trace with hash -795178020, now seen corresponding path program 1 times [2021-11-07 01:48:21,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:21,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067769527] [2021-11-07 01:48:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:21,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:21,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:21,293 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:21,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:48:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:21,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:21,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:21,944 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 01:48:21,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:22,097 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 01:48:22,097 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:22,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067769527] [2021-11-07 01:48:22,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067769527] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:22,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:22,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:48:22,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487719932] [2021-11-07 01:48:22,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:22,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:22,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:22,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:22,100 INFO L87 Difference]: Start difference. First operand 399 states and 682 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 01:48:22,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:22,207 INFO L93 Difference]: Finished difference Result 927 states and 1586 transitions. [2021-11-07 01:48:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:48:22,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:48:22,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:22,215 INFO L225 Difference]: With dead ends: 927 [2021-11-07 01:48:22,216 INFO L226 Difference]: Without dead ends: 772 [2021-11-07 01:48:22,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:22,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-11-07 01:48:22,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 617. [2021-11-07 01:48:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 615 states have (on average 1.7560975609756098) internal successors, (1080), 616 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:22,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1080 transitions. [2021-11-07 01:48:22,286 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1080 transitions. Word has length 48 [2021-11-07 01:48:22,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:22,286 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 1080 transitions. [2021-11-07 01:48:22,286 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 01:48:22,286 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1080 transitions. [2021-11-07 01:48:22,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:48:22,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:22,288 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:22,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:22,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:22,502 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:22,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:22,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1751915381, now seen corresponding path program 1 times [2021-11-07 01:48:22,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:22,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660737099] [2021-11-07 01:48:22,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:22,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:22,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:22,504 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:22,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:48:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:22,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:22,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:23,139 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 01:48:23,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:23,324 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 01:48:23,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:23,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660737099] [2021-11-07 01:48:23,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660737099] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:23,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:23,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:48:23,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630585179] [2021-11-07 01:48:23,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:48:23,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:23,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:48:23,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:23,327 INFO L87 Difference]: Start difference. First operand 617 states and 1080 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:23,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:23,434 INFO L93 Difference]: Finished difference Result 1471 states and 2581 transitions. [2021-11-07 01:48:23,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:23,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:48:23,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:23,442 INFO L225 Difference]: With dead ends: 1471 [2021-11-07 01:48:23,443 INFO L226 Difference]: Without dead ends: 938 [2021-11-07 01:48:23,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:23,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-11-07 01:48:23,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 783. [2021-11-07 01:48:23,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 781 states have (on average 1.768245838668374) internal successors, (1381), 782 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:23,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1381 transitions. [2021-11-07 01:48:23,530 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1381 transitions. Word has length 60 [2021-11-07 01:48:23,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:23,530 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 1381 transitions. [2021-11-07 01:48:23,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:23,531 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1381 transitions. [2021-11-07 01:48:23,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:48:23,533 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:23,533 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:23,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:23,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:23,746 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:23,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:23,746 INFO L85 PathProgramCache]: Analyzing trace with hash -931304180, now seen corresponding path program 1 times [2021-11-07 01:48:23,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:23,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297542264] [2021-11-07 01:48:23,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:23,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:23,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:23,749 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:23,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:48:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:24,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:24,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:24,477 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 01:48:24,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:24,643 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 01:48:24,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:24,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297542264] [2021-11-07 01:48:24,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297542264] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:24,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:24,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:48:24,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216679309] [2021-11-07 01:48:24,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:48:24,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:24,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:48:24,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:24,645 INFO L87 Difference]: Start difference. First operand 783 states and 1381 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:24,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:24,777 INFO L93 Difference]: Finished difference Result 2001 states and 3549 transitions. [2021-11-07 01:48:24,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:24,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:48:24,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:24,789 INFO L225 Difference]: With dead ends: 2001 [2021-11-07 01:48:24,789 INFO L226 Difference]: Without dead ends: 1310 [2021-11-07 01:48:24,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:24,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-11-07 01:48:24,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1155. [2021-11-07 01:48:24,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1153 states have (on average 1.7857762359063314) internal successors, (2059), 1154 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:24,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2059 transitions. [2021-11-07 01:48:24,904 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2059 transitions. Word has length 61 [2021-11-07 01:48:24,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:24,905 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 2059 transitions. [2021-11-07 01:48:24,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:24,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2059 transitions. [2021-11-07 01:48:24,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:48:24,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:24,909 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:24,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:25,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:25,138 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:25,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:25,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1008707811, now seen corresponding path program 1 times [2021-11-07 01:48:25,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:25,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972465274] [2021-11-07 01:48:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:25,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:25,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:25,142 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:25,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:48:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:25,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:25,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:25,891 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 01:48:25,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:26,070 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 01:48:26,071 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:26,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972465274] [2021-11-07 01:48:26,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972465274] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:26,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:26,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:48:26,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964582979] [2021-11-07 01:48:26,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:48:26,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:26,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:48:26,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:26,073 INFO L87 Difference]: Start difference. First operand 1155 states and 2059 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:26,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:26,310 INFO L93 Difference]: Finished difference Result 3097 states and 5552 transitions. [2021-11-07 01:48:26,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:26,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:48:26,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:26,327 INFO L225 Difference]: With dead ends: 3097 [2021-11-07 01:48:26,327 INFO L226 Difference]: Without dead ends: 2042 [2021-11-07 01:48:26,331 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:26,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2021-11-07 01:48:26,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1887. [2021-11-07 01:48:26,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1885 states have (on average 1.8005305039787798) internal successors, (3394), 1886 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 3394 transitions. [2021-11-07 01:48:26,515 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 3394 transitions. Word has length 62 [2021-11-07 01:48:26,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:26,516 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 3394 transitions. [2021-11-07 01:48:26,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 3394 transitions. [2021-11-07 01:48:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:48:26,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:26,520 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:26,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:26,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:26,737 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:26,738 INFO L85 PathProgramCache]: Analyzing trace with hash -181212771, now seen corresponding path program 1 times [2021-11-07 01:48:26,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:26,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739750844] [2021-11-07 01:48:26,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:26,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:26,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:26,741 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:26,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:48:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:27,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:27,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:27,593 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 01:48:27,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:27,774 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 01:48:27,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:27,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739750844] [2021-11-07 01:48:27,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739750844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:27,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:27,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:48:27,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337710604] [2021-11-07 01:48:27,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:48:27,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:27,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:48:27,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:27,776 INFO L87 Difference]: Start difference. First operand 1887 states and 3394 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:28,058 INFO L93 Difference]: Finished difference Result 5029 states and 9076 transitions. [2021-11-07 01:48:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:28,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:48:28,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:28,087 INFO L225 Difference]: With dead ends: 5029 [2021-11-07 01:48:28,087 INFO L226 Difference]: Without dead ends: 3276 [2021-11-07 01:48:28,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:28,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-11-07 01:48:28,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 3121. [2021-11-07 01:48:28,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3121 states, 3119 states have (on average 1.8079512664315485) internal successors, (5639), 3120 states have internal predecessors, (5639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 5639 transitions. [2021-11-07 01:48:28,416 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 5639 transitions. Word has length 63 [2021-11-07 01:48:28,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:28,417 INFO L470 AbstractCegarLoop]: Abstraction has 3121 states and 5639 transitions. [2021-11-07 01:48:28,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:28,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 5639 transitions. [2021-11-07 01:48:28,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:48:28,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:28,421 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:28,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:28,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:28,644 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:28,644 INFO L85 PathProgramCache]: Analyzing trace with hash -610215284, now seen corresponding path program 1 times [2021-11-07 01:48:28,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:28,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293038467] [2021-11-07 01:48:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:28,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:28,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:28,646 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:28,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:48:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:29,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:29,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:29,404 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 01:48:29,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:29,576 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 01:48:29,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:29,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293038467] [2021-11-07 01:48:29,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293038467] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:29,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:29,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:48:29,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307609561] [2021-11-07 01:48:29,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:48:29,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:29,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:48:29,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:29,579 INFO L87 Difference]: Start difference. First operand 3121 states and 5639 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:29,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:29,969 INFO L93 Difference]: Finished difference Result 8447 states and 15294 transitions. [2021-11-07 01:48:29,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:29,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 01:48:29,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:30,011 INFO L225 Difference]: With dead ends: 8447 [2021-11-07 01:48:30,011 INFO L226 Difference]: Without dead ends: 5494 [2021-11-07 01:48:30,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:30,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5494 states. [2021-11-07 01:48:30,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5494 to 5339. [2021-11-07 01:48:30,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5339 states, 5337 states have (on average 1.810755105864718) internal successors, (9664), 5338 states have internal predecessors, (9664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:30,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5339 states to 5339 states and 9664 transitions. [2021-11-07 01:48:30,523 INFO L78 Accepts]: Start accepts. Automaton has 5339 states and 9664 transitions. Word has length 64 [2021-11-07 01:48:30,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:30,524 INFO L470 AbstractCegarLoop]: Abstraction has 5339 states and 9664 transitions. [2021-11-07 01:48:30,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:30,525 INFO L276 IsEmpty]: Start isEmpty. Operand 5339 states and 9664 transitions. [2021-11-07 01:48:30,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:48:30,536 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:30,536 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:30,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:30,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:30,750 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:30,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:30,750 INFO L85 PathProgramCache]: Analyzing trace with hash -891700692, now seen corresponding path program 1 times [2021-11-07 01:48:30,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:30,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232737812] [2021-11-07 01:48:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:30,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:30,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:30,755 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:30,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:48:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:31,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:31,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:31,596 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 01:48:31,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:31,776 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 01:48:31,776 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:31,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232737812] [2021-11-07 01:48:31,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232737812] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:31,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:31,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:48:31,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281550965] [2021-11-07 01:48:31,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:48:31,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:31,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:48:31,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:31,779 INFO L87 Difference]: Start difference. First operand 5339 states and 9664 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:32,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:32,502 INFO L93 Difference]: Finished difference Result 15427 states and 27980 transitions. [2021-11-07 01:48:32,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:32,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:48:32,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:32,573 INFO L225 Difference]: With dead ends: 15427 [2021-11-07 01:48:32,573 INFO L226 Difference]: Without dead ends: 10264 [2021-11-07 01:48:32,581 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:32,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10264 states. [2021-11-07 01:48:33,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10264 to 10109. [2021-11-07 01:48:33,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10109 states, 10107 states have (on average 1.8127040664885723) internal successors, (18321), 10108 states have internal predecessors, (18321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:33,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10109 states to 10109 states and 18321 transitions. [2021-11-07 01:48:33,421 INFO L78 Accepts]: Start accepts. Automaton has 10109 states and 18321 transitions. Word has length 65 [2021-11-07 01:48:33,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:33,421 INFO L470 AbstractCegarLoop]: Abstraction has 10109 states and 18321 transitions. [2021-11-07 01:48:33,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:33,422 INFO L276 IsEmpty]: Start isEmpty. Operand 10109 states and 18321 transitions. [2021-11-07 01:48:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:48:33,427 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:33,427 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] [2021-11-07 01:48:33,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:33,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:33,642 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:33,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:33,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1985124036, now seen corresponding path program 1 times [2021-11-07 01:48:33,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:33,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941249286] [2021-11-07 01:48:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:33,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:33,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:33,644 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:33,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:48:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:34,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:48:34,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:34,458 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 01:48:34,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:34,679 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 01:48:34,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:34,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941249286] [2021-11-07 01:48:34,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941249286] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:34,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:34,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:48:34,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088313372] [2021-11-07 01:48:34,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:48:34,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:34,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:48:34,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:48:34,683 INFO L87 Difference]: Start difference. First operand 10109 states and 18321 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:37,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:37,647 INFO L93 Difference]: Finished difference Result 24886 states and 45116 transitions. [2021-11-07 01:48:37,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:48:37,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:48:37,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:37,695 INFO L225 Difference]: With dead ends: 24886 [2021-11-07 01:48:37,696 INFO L226 Difference]: Without dead ends: 15031 [2021-11-07 01:48:37,711 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 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 01:48:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15031 states. [2021-11-07 01:48:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15031 to 10076. [2021-11-07 01:48:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10074 states have (on average 1.8055390113162597) internal successors, (18189), 10075 states have internal predecessors, (18189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:38,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 18189 transitions. [2021-11-07 01:48:38,471 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 18189 transitions. Word has length 66 [2021-11-07 01:48:38,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:38,471 INFO L470 AbstractCegarLoop]: Abstraction has 10076 states and 18189 transitions. [2021-11-07 01:48:38,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:38,471 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 18189 transitions. [2021-11-07 01:48:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:48:38,477 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:38,477 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:38,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:38,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:38,690 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:38,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:38,690 INFO L85 PathProgramCache]: Analyzing trace with hash 2024507901, now seen corresponding path program 1 times [2021-11-07 01:48:38,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:38,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570327759] [2021-11-07 01:48:38,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:38,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:38,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:38,692 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:38,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:48:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:39,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:39,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:39,548 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 01:48:39,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:39,708 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 01:48:39,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:39,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570327759] [2021-11-07 01:48:39,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570327759] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:39,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:39,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:48:39,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504111800] [2021-11-07 01:48:39,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:48:39,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:39,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:48:39,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:39,711 INFO L87 Difference]: Start difference. First operand 10076 states and 18189 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:40,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:40,478 INFO L93 Difference]: Finished difference Result 29470 states and 53262 transitions. [2021-11-07 01:48:40,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:40,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:48:40,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:40,531 INFO L225 Difference]: With dead ends: 29470 [2021-11-07 01:48:40,531 INFO L226 Difference]: Without dead ends: 19577 [2021-11-07 01:48:40,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:40,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19577 states. [2021-11-07 01:48:41,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19577 to 19422. [2021-11-07 01:48:41,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19422 states, 19420 states have (on average 1.8050463439752833) internal successors, (35054), 19421 states have internal predecessors, (35054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19422 states to 19422 states and 35054 transitions. [2021-11-07 01:48:41,908 INFO L78 Accepts]: Start accepts. Automaton has 19422 states and 35054 transitions. Word has length 66 [2021-11-07 01:48:41,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:41,909 INFO L470 AbstractCegarLoop]: Abstraction has 19422 states and 35054 transitions. [2021-11-07 01:48:41,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:41,909 INFO L276 IsEmpty]: Start isEmpty. Operand 19422 states and 35054 transitions. [2021-11-07 01:48:41,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:48:41,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:41,914 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:48:41,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:42,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:42,114 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:42,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:42,115 INFO L85 PathProgramCache]: Analyzing trace with hash -901460163, now seen corresponding path program 1 times [2021-11-07 01:48:42,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:42,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816367608] [2021-11-07 01:48:42,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:42,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:42,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:42,117 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:42,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:48:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:42,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:42,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:42,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:43,037 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 01:48:43,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:43,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816367608] [2021-11-07 01:48:43,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816367608] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:43,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:43,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:48:43,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675099298] [2021-11-07 01:48:43,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:48:43,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:43,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:48:43,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:43,039 INFO L87 Difference]: Start difference. First operand 19422 states and 35054 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 01:48:44,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:44,548 INFO L93 Difference]: Finished difference Result 57694 states and 104171 transitions. [2021-11-07 01:48:44,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:44,549 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 01:48:44,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:44,641 INFO L225 Difference]: With dead ends: 57694 [2021-11-07 01:48:44,641 INFO L226 Difference]: Without dead ends: 38459 [2021-11-07 01:48:44,673 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 01:48:44,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38459 states. [2021-11-07 01:48:46,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38459 to 38304. [2021-11-07 01:48:47,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38304 states, 38302 states have (on average 1.802490731554488) internal successors, (69039), 38303 states have internal predecessors, (69039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:47,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38304 states to 38304 states and 69039 transitions. [2021-11-07 01:48:47,128 INFO L78 Accepts]: Start accepts. Automaton has 38304 states and 69039 transitions. Word has length 67 [2021-11-07 01:48:47,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:47,129 INFO L470 AbstractCegarLoop]: Abstraction has 38304 states and 69039 transitions. [2021-11-07 01:48:47,129 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 01:48:47,129 INFO L276 IsEmpty]: Start isEmpty. Operand 38304 states and 69039 transitions. [2021-11-07 01:48:47,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:48:47,137 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:47,138 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] [2021-11-07 01:48:47,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:48:47,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:47,354 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:47,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:47,354 INFO L85 PathProgramCache]: Analyzing trace with hash 389338678, now seen corresponding path program 1 times [2021-11-07 01:48:47,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:47,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110580415] [2021-11-07 01:48:47,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:47,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:47,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:47,357 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:47,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:48:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:47,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:48:47,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:48,166 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 01:48:48,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:48,366 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 01:48:48,366 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:48,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110580415] [2021-11-07 01:48:48,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110580415] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:48,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:48,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:48:48,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715857706] [2021-11-07 01:48:48,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:48:48,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:48,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:48:48,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:48:48,367 INFO L87 Difference]: Start difference. First operand 38304 states and 69039 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:55,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:55,372 INFO L93 Difference]: Finished difference Result 148613 states and 267703 transitions. [2021-11-07 01:48:55,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:48:55,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 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 01:48:55,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:55,591 INFO L225 Difference]: With dead ends: 148613 [2021-11-07 01:48:55,591 INFO L226 Difference]: Without dead ends: 110562 [2021-11-07 01:48:55,866 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 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 01:48:55,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110562 states. [2021-11-07 01:48:59,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110562 to 38046. [2021-11-07 01:48:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38046 states, 38044 states have (on average 1.7875880559352328) internal successors, (68007), 38045 states have internal predecessors, (68007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:59,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38046 states to 38046 states and 68007 transitions. [2021-11-07 01:48:59,686 INFO L78 Accepts]: Start accepts. Automaton has 38046 states and 68007 transitions. Word has length 68 [2021-11-07 01:48:59,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:59,686 INFO L470 AbstractCegarLoop]: Abstraction has 38046 states and 68007 transitions. [2021-11-07 01:48:59,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:59,687 INFO L276 IsEmpty]: Start isEmpty. Operand 38046 states and 68007 transitions. [2021-11-07 01:48:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:48:59,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:59,694 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] [2021-11-07 01:48:59,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:59,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:59,914 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:59,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:59,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1623422552, now seen corresponding path program 1 times [2021-11-07 01:48:59,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:59,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724769222] [2021-11-07 01:48:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:59,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:59,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:59,917 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:59,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:49:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:00,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:00,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:00,758 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 01:49:00,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:00,934 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 01:49:00,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:00,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724769222] [2021-11-07 01:49:00,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724769222] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:00,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:00,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:49:00,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224429302] [2021-11-07 01:49:00,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:00,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:00,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:00,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:00,937 INFO L87 Difference]: Start difference. First operand 38046 states and 68007 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2021-11-07 01:49:02,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:02,920 INFO L93 Difference]: Finished difference Result 75988 states and 135839 transitions. [2021-11-07 01:49:02,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:02,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) Word has length 68 [2021-11-07 01:49:02,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:02,989 INFO L225 Difference]: With dead ends: 75988 [2021-11-07 01:49:02,989 INFO L226 Difference]: Without dead ends: 38201 [2021-11-07 01:49:03,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 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 01:49:03,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38201 states. [2021-11-07 01:49:05,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38201 to 38046. [2021-11-07 01:49:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38046 states, 38044 states have (on average 1.7842235306487226) internal successors, (67879), 38045 states have internal predecessors, (67879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38046 states to 38046 states and 67879 transitions. [2021-11-07 01:49:05,257 INFO L78 Accepts]: Start accepts. Automaton has 38046 states and 67879 transitions. Word has length 68 [2021-11-07 01:49:05,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:05,257 INFO L470 AbstractCegarLoop]: Abstraction has 38046 states and 67879 transitions. [2021-11-07 01:49:05,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2021-11-07 01:49:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 38046 states and 67879 transitions. [2021-11-07 01:49:05,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:49:05,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:05,264 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 01:49:05,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:05,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:05,482 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:05,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:05,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1906541493, now seen corresponding path program 1 times [2021-11-07 01:49:05,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:05,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296489438] [2021-11-07 01:49:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:05,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:05,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:05,484 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:05,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bb9ae21-7315-4f09-9cff-091d03887bcd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:49:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:06,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:06,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:06,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:06,569 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 01:49:06,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:06,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296489438] [2021-11-07 01:49:06,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296489438] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:06,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:06,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:06,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199157613] [2021-11-07 01:49:06,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:06,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:06,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:06,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:06,571 INFO L87 Difference]: Start difference. First operand 38046 states and 67879 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 01:49:09,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:09,995 INFO L93 Difference]: Finished difference Result 105726 states and 188265 transitions. [2021-11-07 01:49:09,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:09,996 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 01:49:09,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:10,120 INFO L225 Difference]: With dead ends: 105726 [2021-11-07 01:49:10,120 INFO L226 Difference]: Without dead ends: 67899 [2021-11-07 01:49:10,144 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 01:49:10,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67899 states.