./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec8_product15.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_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/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_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/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_b380ab98-1c3e-4d09-97b5-c9aad4924f44/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 b1bbd85396e3eb1de7562114efc1b104d28592355874c6166c296894ed6f999d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:01:41,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:01:41,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:01:42,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:01:42,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:01:42,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:01:42,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:01:42,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:01:42,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:01:42,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:01:42,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:01:42,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:01:42,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:01:42,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:01:42,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:01:42,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:01:42,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:01:42,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:01:42,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:01:42,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:01:42,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:01:42,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:01:42,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:01:42,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:01:42,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:01:42,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:01:42,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:01:42,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:01:42,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:01:42,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:01:42,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:01:42,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:01:42,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:01:42,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:01:42,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:01:42,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:01:42,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:01:42,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:01:42,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:01:42,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:01:42,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:01:42,131 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:01:42,172 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:01:42,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:01:42,173 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:01:42,174 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:01:42,174 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:01:42,174 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:01:42,174 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:01:42,175 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:01:42,175 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:01:42,175 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:01:42,175 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:01:42,176 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:01:42,176 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:01:42,176 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:01:42,176 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:01:42,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:01:42,177 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:01:42,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:01:42,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:01:42,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:01:42,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:01:42,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:01:42,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:01:42,179 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:01:42,179 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:01:42,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:01:42,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:01:42,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:01:42,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:01:42,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:01:42,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:01:42,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:01:42,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:01:42,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:01:42,182 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:01:42,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:01:42,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:01:42,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:01:42,183 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:01:42,183 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_b380ab98-1c3e-4d09-97b5-c9aad4924f44/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1bbd85396e3eb1de7562114efc1b104d28592355874c6166c296894ed6f999d [2021-11-07 01:01:42,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:01:42,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:01:42,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:01:42,557 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:01:42,558 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:01:42,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product15.cil.c [2021-11-07 01:01:42,657 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/data/3651bdf20/57b5de4bb2574ad598c1d3c8e72abc78/FLAG57839ce93 [2021-11-07 01:01:43,449 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:01:43,450 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/sv-benchmarks/c/product-lines/email_spec8_product15.cil.c [2021-11-07 01:01:43,483 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/data/3651bdf20/57b5de4bb2574ad598c1d3c8e72abc78/FLAG57839ce93 [2021-11-07 01:01:43,592 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/data/3651bdf20/57b5de4bb2574ad598c1d3c8e72abc78 [2021-11-07 01:01:43,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:01:43,597 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:01:43,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:01:43,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:01:43,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:01:43,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:01:43" (1/1) ... [2021-11-07 01:01:43,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e916ade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:43, skipping insertion in model container [2021-11-07 01:01:43,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:01:43" (1/1) ... [2021-11-07 01:01:43,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:01:43,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:01:44,364 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_b380ab98-1c3e-4d09-97b5-c9aad4924f44/sv-benchmarks/c/product-lines/email_spec8_product15.cil.c[44955,44968] [2021-11-07 01:01:44,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:01:44,550 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 01:01:44,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@113ee60e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:44, skipping insertion in model container [2021-11-07 01:01:44,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:01:44,554 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:01:44,557 INFO L168 Benchmark]: Toolchain (without parser) took 958.38 ms. Allocated memory was 77.6 MB in the beginning and 98.6 MB in the end (delta: 21.0 MB). Free memory was 36.8 MB in the beginning and 60.9 MB in the end (delta: -24.1 MB). Peak memory consumption was 2.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:01:44,558 INFO L168 Benchmark]: CDTParser took 1.21 ms. Allocated memory is still 77.6 MB. Free memory is still 55.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:01:44,560 INFO L168 Benchmark]: CACSL2BoogieTranslator took 951.79 ms. Allocated memory was 77.6 MB in the beginning and 98.6 MB in the end (delta: 21.0 MB). Free memory was 36.6 MB in the beginning and 60.9 MB in the end (delta: -24.3 MB). Peak memory consumption was 2.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:01:44,562 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.21 ms. Allocated memory is still 77.6 MB. Free memory is still 55.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 951.79 ms. Allocated memory was 77.6 MB in the beginning and 98.6 MB in the end (delta: 21.0 MB). Free memory was 36.6 MB in the beginning and 60.9 MB in the end (delta: -24.3 MB). Peak memory consumption was 2.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2530]: 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_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/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_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/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_b380ab98-1c3e-4d09-97b5-c9aad4924f44/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 b1bbd85396e3eb1de7562114efc1b104d28592355874c6166c296894ed6f999d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:01:47,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:01:47,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:01:47,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:01:47,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:01:47,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:01:47,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:01:47,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:01:47,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:01:47,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:01:47,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:01:47,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:01:47,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:01:47,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:01:47,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:01:47,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:01:47,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:01:47,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:01:47,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:01:47,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:01:47,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:01:47,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:01:47,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:01:47,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:01:47,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:01:47,656 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:01:47,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:01:47,657 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:01:47,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:01:47,659 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:01:47,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:01:47,661 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:01:47,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:01:47,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:01:47,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:01:47,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:01:47,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:01:47,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:01:47,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:01:47,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:01:47,670 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:01:47,672 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:01:47,704 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:01:47,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:01:47,706 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:01:47,706 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:01:47,707 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:01:47,707 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:01:47,707 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:01:47,708 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:01:47,708 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:01:47,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:01:47,709 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:01:47,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:01:47,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:01:47,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:01:47,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:01:47,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:01:47,711 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:01:47,711 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:01:47,712 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:01:47,712 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:01:47,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:01:47,713 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:01:47,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:01:47,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:01:47,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:01:47,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:01:47,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:01:47,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:01:47,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:01:47,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:01:47,715 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:01:47,716 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:01:47,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:01:47,716 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:01:47,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:01:47,717 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_b380ab98-1c3e-4d09-97b5-c9aad4924f44/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1bbd85396e3eb1de7562114efc1b104d28592355874c6166c296894ed6f999d [2021-11-07 01:01:48,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:01:48,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:01:48,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:01:48,261 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:01:48,262 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:01:48,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product15.cil.c [2021-11-07 01:01:48,345 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/data/78a2b4583/169abe262f7a4afdbb7814672247f9f8/FLAG91c0fc463 [2021-11-07 01:01:49,114 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:01:49,114 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/sv-benchmarks/c/product-lines/email_spec8_product15.cil.c [2021-11-07 01:01:49,141 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/data/78a2b4583/169abe262f7a4afdbb7814672247f9f8/FLAG91c0fc463 [2021-11-07 01:01:49,326 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/data/78a2b4583/169abe262f7a4afdbb7814672247f9f8 [2021-11-07 01:01:49,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:01:49,333 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:01:49,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:01:49,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:01:49,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:01:49,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:01:49" (1/1) ... [2021-11-07 01:01:49,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32fb480f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:49, skipping insertion in model container [2021-11-07 01:01:49,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:01:49" (1/1) ... [2021-11-07 01:01:49,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:01:49,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:01:50,374 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_b380ab98-1c3e-4d09-97b5-c9aad4924f44/sv-benchmarks/c/product-lines/email_spec8_product15.cil.c[44955,44968] [2021-11-07 01:01:50,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:01:50,506 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:01:50,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:01:50,629 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_b380ab98-1c3e-4d09-97b5-c9aad4924f44/sv-benchmarks/c/product-lines/email_spec8_product15.cil.c[44955,44968] [2021-11-07 01:01:50,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:01:50,695 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:01:50,816 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_b380ab98-1c3e-4d09-97b5-c9aad4924f44/sv-benchmarks/c/product-lines/email_spec8_product15.cil.c[44955,44968] [2021-11-07 01:01:50,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:01:50,885 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:01:50,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:50 WrapperNode [2021-11-07 01:01:50,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:01:50,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:01:50,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:01:50,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:01:50,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:50" (1/1) ... [2021-11-07 01:01:50,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:50" (1/1) ... [2021-11-07 01:01:51,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:01:51,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:01:51,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:01:51,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:01:51,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:50" (1/1) ... [2021-11-07 01:01:51,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:50" (1/1) ... [2021-11-07 01:01:51,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:50" (1/1) ... [2021-11-07 01:01:51,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:50" (1/1) ... [2021-11-07 01:01:51,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:50" (1/1) ... [2021-11-07 01:01:51,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:50" (1/1) ... [2021-11-07 01:01:51,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:50" (1/1) ... [2021-11-07 01:01:51,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:01:51,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:01:51,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:01:51,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:01:51,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:50" (1/1) ... [2021-11-07 01:01:51,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:01:51,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:01:51,302 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:01:51,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:01:51,355 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:01:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:01:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:01:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:01:51,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:01:56,180 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:01:56,180 INFO L299 CfgBuilder]: Removed 259 assume(true) statements. [2021-11-07 01:01:56,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:01:56 BoogieIcfgContainer [2021-11-07 01:01:56,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:01:56,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:01:56,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:01:56,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:01:56,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:01:49" (1/3) ... [2021-11-07 01:01:56,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b75f32c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:01:56, skipping insertion in model container [2021-11-07 01:01:56,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:50" (2/3) ... [2021-11-07 01:01:56,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b75f32c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:01:56, skipping insertion in model container [2021-11-07 01:01:56,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:01:56" (3/3) ... [2021-11-07 01:01:56,195 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec8_product15.cil.c [2021-11-07 01:01:56,202 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:01:56,202 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:01:56,268 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:01:56,276 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 01:01:56,276 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:01:56,307 INFO L276 IsEmpty]: Start isEmpty. Operand has 411 states, 408 states have (on average 1.7647058823529411) internal successors, (720), 410 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:56,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:01:56,324 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:56,324 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:01:56,325 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:01:56,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:56,333 INFO L85 PathProgramCache]: Analyzing trace with hash 827013746, now seen corresponding path program 1 times [2021-11-07 01:01:56,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:01:56,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077692160] [2021-11-07 01:01:56,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:56,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:01:56,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:01:56,359 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:01:56,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:01:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:56,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:01:56,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:57,139 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 01:01:57,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:57,283 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 01:01:57,284 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:01:57,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077692160] [2021-11-07 01:01:57,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077692160] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:57,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:57,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:01:57,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881107331] [2021-11-07 01:01:57,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:01:57,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:01:57,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:01:57,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:01:57,323 INFO L87 Difference]: Start difference. First operand has 411 states, 408 states have (on average 1.7647058823529411) internal successors, (720), 410 states have internal predecessors, (720), 0 states have call successors, (0), 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 01:01:57,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:57,438 INFO L93 Difference]: Finished difference Result 580 states and 999 transitions. [2021-11-07 01:01:57,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:01:57,439 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 01:01:57,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:57,465 INFO L225 Difference]: With dead ends: 580 [2021-11-07 01:01:57,467 INFO L226 Difference]: Without dead ends: 365 [2021-11-07 01:01:57,472 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 01:01:57,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-07 01:01:57,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2021-11-07 01:01:57,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 363 states have (on average 1.7603305785123966) internal successors, (639), 364 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 639 transitions. [2021-11-07 01:01:57,586 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 639 transitions. Word has length 41 [2021-11-07 01:01:57,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:57,587 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 639 transitions. [2021-11-07 01:01:57,597 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 01:01:57,598 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 639 transitions. [2021-11-07 01:01:57,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 01:01:57,604 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:57,605 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 01:01:57,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:01:57,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:01:57,816 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:01:57,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:57,817 INFO L85 PathProgramCache]: Analyzing trace with hash 935401701, now seen corresponding path program 1 times [2021-11-07 01:01:57,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:01:57,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448314501] [2021-11-07 01:01:57,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:57,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:01:57,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:01:57,821 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:01:57,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:01:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:58,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:01:58,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:58,514 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 01:01:58,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:58,665 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 01:01:58,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:01:58,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448314501] [2021-11-07 01:01:58,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448314501] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:58,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:58,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:01:58,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580048634] [2021-11-07 01:01:58,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:01:58,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:01:58,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:01:58,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:01:58,678 INFO L87 Difference]: Start difference. First operand 365 states and 639 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 01:01:58,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:58,837 INFO L93 Difference]: Finished difference Result 1065 states and 1869 transitions. [2021-11-07 01:01:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:01:58,838 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 01:01:58,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:58,848 INFO L225 Difference]: With dead ends: 1065 [2021-11-07 01:01:58,849 INFO L226 Difference]: Without dead ends: 715 [2021-11-07 01:01:58,856 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 01:01:58,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-11-07 01:01:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 364. [2021-11-07 01:01:58,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 362 states have (on average 1.7513812154696133) internal successors, (634), 363 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:58,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 634 transitions. [2021-11-07 01:01:58,923 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 634 transitions. Word has length 42 [2021-11-07 01:01:58,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:58,924 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 634 transitions. [2021-11-07 01:01:58,925 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 01:01:58,925 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 634 transitions. [2021-11-07 01:01:58,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:01:58,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:58,939 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 01:01:58,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:59,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:01:59,152 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:01:59,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:59,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1139727423, now seen corresponding path program 1 times [2021-11-07 01:01:59,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:01:59,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213955936] [2021-11-07 01:01:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:59,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:01:59,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:01:59,162 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:01:59,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:01:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:59,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:01:59,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:59,810 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 01:01:59,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:59,981 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:01:59,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213955936] [2021-11-07 01:01:59,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213955936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:59,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:59,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:01:59,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622873966] [2021-11-07 01:01:59,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:01:59,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:01:59,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:01:59,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:01:59,985 INFO L87 Difference]: Start difference. First operand 364 states and 634 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 01:02:00,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:00,277 INFO L93 Difference]: Finished difference Result 1373 states and 2398 transitions. [2021-11-07 01:02:00,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:02:00,277 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 01:02:00,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:00,287 INFO L225 Difference]: With dead ends: 1373 [2021-11-07 01:02:00,287 INFO L226 Difference]: Without dead ends: 1027 [2021-11-07 01:02:00,289 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 01:02:00,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2021-11-07 01:02:00,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 363. [2021-11-07 01:02:00,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 361 states have (on average 1.745152354570637) internal successors, (630), 362 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:00,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 630 transitions. [2021-11-07 01:02:00,341 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 630 transitions. Word has length 44 [2021-11-07 01:02:00,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:00,342 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 630 transitions. [2021-11-07 01:02:00,342 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 01:02:00,342 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 630 transitions. [2021-11-07 01:02:00,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:02:00,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:00,344 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 01:02:00,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:00,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:00,562 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:00,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:00,563 INFO L85 PathProgramCache]: Analyzing trace with hash 2033694732, now seen corresponding path program 1 times [2021-11-07 01:02:00,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:00,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1633879218] [2021-11-07 01:02:00,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:00,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:00,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:00,566 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:00,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:02:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:01,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:02:01,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:01,227 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 01:02:01,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:01,370 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 01:02:01,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:01,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1633879218] [2021-11-07 01:02:01,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1633879218] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:01,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:01,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:02:01,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174602748] [2021-11-07 01:02:01,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:02:01,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:01,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:02:01,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:02:01,374 INFO L87 Difference]: Start difference. First operand 363 states and 630 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 01:02:01,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:01,443 INFO L93 Difference]: Finished difference Result 723 states and 1257 transitions. [2021-11-07 01:02:01,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:02:01,443 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 01:02:01,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:01,446 INFO L225 Difference]: With dead ends: 723 [2021-11-07 01:02:01,447 INFO L226 Difference]: Without dead ends: 368 [2021-11-07 01:02:01,448 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 01:02:01,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-07 01:02:01,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 363. [2021-11-07 01:02:01,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 361 states have (on average 1.736842105263158) internal successors, (627), 362 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 627 transitions. [2021-11-07 01:02:01,473 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 627 transitions. Word has length 45 [2021-11-07 01:02:01,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:01,474 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 627 transitions. [2021-11-07 01:02:01,474 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 01:02:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 627 transitions. [2021-11-07 01:02:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:02:01,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:01,476 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 01:02:01,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:01,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:01,696 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:01,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:01,696 INFO L85 PathProgramCache]: Analyzing trace with hash 99112535, now seen corresponding path program 1 times [2021-11-07 01:02:01,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:01,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903410284] [2021-11-07 01:02:01,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:01,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:01,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:01,700 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:01,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:02:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:02,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:02:02,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:02,453 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 01:02:02,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:02,627 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 01:02:02,632 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:02,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903410284] [2021-11-07 01:02:02,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903410284] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:02,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:02,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:02:02,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51553914] [2021-11-07 01:02:02,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:02:02,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:02,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:02:02,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:02:02,640 INFO L87 Difference]: Start difference. First operand 363 states and 627 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 01:02:02,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:02,906 INFO L93 Difference]: Finished difference Result 1360 states and 2374 transitions. [2021-11-07 01:02:02,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:02:02,907 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 01:02:02,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:02,916 INFO L225 Difference]: With dead ends: 1360 [2021-11-07 01:02:02,917 INFO L226 Difference]: Without dead ends: 1023 [2021-11-07 01:02:02,919 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 01:02:02,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-11-07 01:02:02,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 363. [2021-11-07 01:02:02,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 361 states have (on average 1.7285318559556786) internal successors, (624), 362 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:02,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 624 transitions. [2021-11-07 01:02:02,980 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 624 transitions. Word has length 46 [2021-11-07 01:02:02,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:02,981 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 624 transitions. [2021-11-07 01:02:02,981 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 01:02:02,981 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 624 transitions. [2021-11-07 01:02:02,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:02:02,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:02,983 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 01:02:03,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:03,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:03,196 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:03,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:03,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1995610556, now seen corresponding path program 1 times [2021-11-07 01:02:03,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:03,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217341877] [2021-11-07 01:02:03,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:03,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:03,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:03,200 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:03,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:02:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:03,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:02:03,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:03,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:04,075 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 01:02:04,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:04,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217341877] [2021-11-07 01:02:04,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217341877] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:04,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:04,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:02:04,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216887872] [2021-11-07 01:02:04,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:02:04,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:04,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:02:04,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:02:04,081 INFO L87 Difference]: Start difference. First operand 363 states and 624 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 01:02:04,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:04,165 INFO L93 Difference]: Finished difference Result 823 states and 1419 transitions. [2021-11-07 01:02:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:02:04,165 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 01:02:04,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:04,172 INFO L225 Difference]: With dead ends: 823 [2021-11-07 01:02:04,172 INFO L226 Difference]: Without dead ends: 700 [2021-11-07 01:02:04,173 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 01:02:04,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-11-07 01:02:04,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 577. [2021-11-07 01:02:04,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 575 states have (on average 1.7652173913043478) internal successors, (1015), 576 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1015 transitions. [2021-11-07 01:02:04,250 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1015 transitions. Word has length 48 [2021-11-07 01:02:04,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:04,251 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 1015 transitions. [2021-11-07 01:02:04,251 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 01:02:04,251 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1015 transitions. [2021-11-07 01:02:04,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:02:04,254 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:04,254 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 01:02:04,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:04,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:04,480 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:04,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:04,480 INFO L85 PathProgramCache]: Analyzing trace with hash -186561717, now seen corresponding path program 1 times [2021-11-07 01:02:04,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:04,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281427757] [2021-11-07 01:02:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:04,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:04,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:04,482 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:04,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:02:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:05,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:02:05,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:05,207 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 01:02:05,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:05,389 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 01:02:05,389 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:05,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281427757] [2021-11-07 01:02:05,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281427757] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:05,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:05,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:02:05,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284379904] [2021-11-07 01:02:05,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:02:05,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:05,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:02:05,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:02:05,392 INFO L87 Difference]: Start difference. First operand 577 states and 1015 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 01:02:05,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:05,485 INFO L93 Difference]: Finished difference Result 1355 states and 2393 transitions. [2021-11-07 01:02:05,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:02:05,486 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 01:02:05,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:05,494 INFO L225 Difference]: With dead ends: 1355 [2021-11-07 01:02:05,494 INFO L226 Difference]: Without dead ends: 862 [2021-11-07 01:02:05,495 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 01:02:05,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-11-07 01:02:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 739. [2021-11-07 01:02:05,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 737 states have (on average 1.7761194029850746) internal successors, (1309), 738 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1309 transitions. [2021-11-07 01:02:05,595 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1309 transitions. Word has length 60 [2021-11-07 01:02:05,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:05,595 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 1309 transitions. [2021-11-07 01:02:05,596 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 01:02:05,596 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1309 transitions. [2021-11-07 01:02:05,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:02:05,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:05,598 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 01:02:05,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:05,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:05,816 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:05,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:05,817 INFO L85 PathProgramCache]: Analyzing trace with hash 634049484, now seen corresponding path program 1 times [2021-11-07 01:02:05,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:05,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8571277] [2021-11-07 01:02:05,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:05,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:05,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:05,820 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:05,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:02:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:06,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:02:06,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:06,570 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 01:02:06,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:06,746 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 01:02:06,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:06,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8571277] [2021-11-07 01:02:06,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8571277] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:06,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:06,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:02:06,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680014250] [2021-11-07 01:02:06,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:02:06,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:06,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:02:06,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:02:06,750 INFO L87 Difference]: Start difference. First operand 739 states and 1309 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 01:02:06,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:06,901 INFO L93 Difference]: Finished difference Result 1873 states and 3340 transitions. [2021-11-07 01:02:06,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:02:06,902 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 01:02:06,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:06,916 INFO L225 Difference]: With dead ends: 1873 [2021-11-07 01:02:06,916 INFO L226 Difference]: Without dead ends: 1226 [2021-11-07 01:02:06,919 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 01:02:06,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-11-07 01:02:07,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1103. [2021-11-07 01:02:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1101 states have (on average 1.7920072661217075) internal successors, (1973), 1102 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:07,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1973 transitions. [2021-11-07 01:02:07,067 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1973 transitions. Word has length 61 [2021-11-07 01:02:07,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:07,067 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1973 transitions. [2021-11-07 01:02:07,068 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 01:02:07,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1973 transitions. [2021-11-07 01:02:07,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:02:07,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:07,072 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 01:02:07,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:07,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:07,288 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:07,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:07,288 INFO L85 PathProgramCache]: Analyzing trace with hash 556645853, now seen corresponding path program 1 times [2021-11-07 01:02:07,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:07,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246251022] [2021-11-07 01:02:07,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:07,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:07,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:07,291 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:07,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:02:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:07,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:02:07,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:08,030 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 01:02:08,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:08,216 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 01:02:08,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:08,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246251022] [2021-11-07 01:02:08,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246251022] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:08,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:08,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:02:08,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561067201] [2021-11-07 01:02:08,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:02:08,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:08,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:02:08,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:02:08,219 INFO L87 Difference]: Start difference. First operand 1103 states and 1973 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 01:02:08,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:08,409 INFO L93 Difference]: Finished difference Result 2945 states and 5301 transitions. [2021-11-07 01:02:08,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:02:08,410 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 01:02:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:08,426 INFO L225 Difference]: With dead ends: 2945 [2021-11-07 01:02:08,426 INFO L226 Difference]: Without dead ends: 1942 [2021-11-07 01:02:08,429 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 01:02:08,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2021-11-07 01:02:08,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1819. [2021-11-07 01:02:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1817 states have (on average 1.8051733626857458) internal successors, (3280), 1818 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:08,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 3280 transitions. [2021-11-07 01:02:08,637 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 3280 transitions. Word has length 62 [2021-11-07 01:02:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:08,638 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 3280 transitions. [2021-11-07 01:02:08,638 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 01:02:08,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 3280 transitions. [2021-11-07 01:02:08,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:02:08,643 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:08,643 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 01:02:08,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:08,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:08,862 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:08,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:08,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1384140893, now seen corresponding path program 1 times [2021-11-07 01:02:08,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:08,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300492624] [2021-11-07 01:02:08,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:08,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:08,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:08,865 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:08,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:02:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:09,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:02:09,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:09,650 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 01:02:09,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:09,852 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 01:02:09,852 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:09,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300492624] [2021-11-07 01:02:09,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300492624] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:09,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:09,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:02:09,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074410035] [2021-11-07 01:02:09,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:02:09,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:09,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:02:09,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:02:09,855 INFO L87 Difference]: Start difference. First operand 1819 states and 3280 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 01:02:10,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:10,158 INFO L93 Difference]: Finished difference Result 4829 states and 8741 transitions. [2021-11-07 01:02:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:02:10,158 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 01:02:10,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:10,187 INFO L225 Difference]: With dead ends: 4829 [2021-11-07 01:02:10,187 INFO L226 Difference]: Without dead ends: 3144 [2021-11-07 01:02:10,194 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 01:02:10,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2021-11-07 01:02:10,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 3021. [2021-11-07 01:02:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 3019 states have (on average 1.8115269956939384) internal successors, (5469), 3020 states have internal predecessors, (5469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 5469 transitions. [2021-11-07 01:02:10,540 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 5469 transitions. Word has length 63 [2021-11-07 01:02:10,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:10,540 INFO L470 AbstractCegarLoop]: Abstraction has 3021 states and 5469 transitions. [2021-11-07 01:02:10,540 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 01:02:10,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 5469 transitions. [2021-11-07 01:02:10,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:02:10,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:10,545 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 01:02:10,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:10,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:10,761 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:10,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:10,762 INFO L85 PathProgramCache]: Analyzing trace with hash 955138380, now seen corresponding path program 1 times [2021-11-07 01:02:10,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:10,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395182024] [2021-11-07 01:02:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:10,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:10,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:10,764 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:10,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:02:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:11,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:02:11,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:11,502 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 01:02:11,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:11,703 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 01:02:11,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:11,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395182024] [2021-11-07 01:02:11,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395182024] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:11,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:11,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:02:11,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393073038] [2021-11-07 01:02:11,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:02:11,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:11,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:02:11,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:02:11,714 INFO L87 Difference]: Start difference. First operand 3021 states and 5469 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 01:02:12,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:12,185 INFO L93 Difference]: Finished difference Result 8151 states and 14791 transitions. [2021-11-07 01:02:12,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:02:12,186 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 01:02:12,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:12,232 INFO L225 Difference]: With dead ends: 8151 [2021-11-07 01:02:12,232 INFO L226 Difference]: Without dead ends: 5298 [2021-11-07 01:02:12,238 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 01:02:12,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5298 states. [2021-11-07 01:02:12,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5298 to 5175. [2021-11-07 01:02:12,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5175 states, 5173 states have (on average 1.8136477865841871) internal successors, (9382), 5174 states have internal predecessors, (9382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:12,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5175 states to 5175 states and 9382 transitions. [2021-11-07 01:02:12,839 INFO L78 Accepts]: Start accepts. Automaton has 5175 states and 9382 transitions. Word has length 64 [2021-11-07 01:02:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:12,841 INFO L470 AbstractCegarLoop]: Abstraction has 5175 states and 9382 transitions. [2021-11-07 01:02:12,841 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 01:02:12,841 INFO L276 IsEmpty]: Start isEmpty. Operand 5175 states and 9382 transitions. [2021-11-07 01:02:12,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:02:12,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:12,855 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:02:12,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 01:02:13,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:13,070 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:13,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:13,071 INFO L85 PathProgramCache]: Analyzing trace with hash 673652972, now seen corresponding path program 1 times [2021-11-07 01:02:13,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:13,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599569737] [2021-11-07 01:02:13,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:13,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:13,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:13,075 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:13,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:02:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:13,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:02:13,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:13,999 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 01:02:14,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:14,182 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 01:02:14,183 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:14,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599569737] [2021-11-07 01:02:14,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599569737] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:14,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:14,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:02:14,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176166481] [2021-11-07 01:02:14,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:02:14,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:14,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:02:14,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:02:14,186 INFO L87 Difference]: Start difference. First operand 5175 states and 9382 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 01:02:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:14,978 INFO L93 Difference]: Finished difference Result 15071 states and 27372 transitions. [2021-11-07 01:02:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:02:14,979 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 01:02:14,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:15,066 INFO L225 Difference]: With dead ends: 15071 [2021-11-07 01:02:15,066 INFO L226 Difference]: Without dead ends: 10068 [2021-11-07 01:02:15,075 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 01:02:15,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10068 states. [2021-11-07 01:02:16,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10068 to 9945. [2021-11-07 01:02:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9945 states, 9943 states have (on average 1.8142411746957658) internal successors, (18039), 9944 states have internal predecessors, (18039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:16,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9945 states to 9945 states and 18039 transitions. [2021-11-07 01:02:16,099 INFO L78 Accepts]: Start accepts. Automaton has 9945 states and 18039 transitions. Word has length 65 [2021-11-07 01:02:16,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:16,100 INFO L470 AbstractCegarLoop]: Abstraction has 9945 states and 18039 transitions. [2021-11-07 01:02:16,101 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 01:02:16,101 INFO L276 IsEmpty]: Start isEmpty. Operand 9945 states and 18039 transitions. [2021-11-07 01:02:16,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:02:16,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:16,109 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 01:02:16,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:16,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:16,329 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:16,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:16,330 INFO L85 PathProgramCache]: Analyzing trace with hash 805664540, now seen corresponding path program 1 times [2021-11-07 01:02:16,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:16,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697057162] [2021-11-07 01:02:16,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:16,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:16,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:16,334 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:16,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:02:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:17,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:02:17,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:17,303 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 01:02:17,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:17,544 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 01:02:17,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:17,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697057162] [2021-11-07 01:02:17,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697057162] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:17,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:17,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:02:17,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434330841] [2021-11-07 01:02:17,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:02:17,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:17,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:02:17,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:02:17,546 INFO L87 Difference]: Start difference. First operand 9945 states and 18039 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 01:02:20,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:20,842 INFO L93 Difference]: Finished difference Result 24466 states and 44396 transitions. [2021-11-07 01:02:20,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:02:20,843 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 01:02:20,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:20,902 INFO L225 Difference]: With dead ends: 24466 [2021-11-07 01:02:20,902 INFO L226 Difference]: Without dead ends: 14771 [2021-11-07 01:02:20,920 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 01:02:20,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14771 states. [2021-11-07 01:02:21,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14771 to 9912. [2021-11-07 01:02:21,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9912 states, 9910 states have (on average 1.806962663975782) internal successors, (17907), 9911 states have internal predecessors, (17907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:21,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9912 states to 9912 states and 17907 transitions. [2021-11-07 01:02:21,846 INFO L78 Accepts]: Start accepts. Automaton has 9912 states and 17907 transitions. Word has length 66 [2021-11-07 01:02:21,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:21,846 INFO L470 AbstractCegarLoop]: Abstraction has 9912 states and 17907 transitions. [2021-11-07 01:02:21,846 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 01:02:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 9912 states and 17907 transitions. [2021-11-07 01:02:21,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:02:21,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:21,854 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 01:02:21,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:02:22,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:22,073 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:22,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:22,073 INFO L85 PathProgramCache]: Analyzing trace with hash -705105731, now seen corresponding path program 1 times [2021-11-07 01:02:22,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:22,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053052105] [2021-11-07 01:02:22,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:22,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:22,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:22,077 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:22,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:02:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:22,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:02:22,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:23,190 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 01:02:23,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:23,406 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 01:02:23,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:23,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053052105] [2021-11-07 01:02:23,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053052105] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:23,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:23,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:02:23,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855062904] [2021-11-07 01:02:23,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:02:23,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:23,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:02:23,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:02:23,409 INFO L87 Difference]: Start difference. First operand 9912 states and 17907 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 01:02:24,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:24,495 INFO L93 Difference]: Finished difference Result 28986 states and 52430 transitions. [2021-11-07 01:02:24,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:02:24,496 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 01:02:24,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:24,564 INFO L225 Difference]: With dead ends: 28986 [2021-11-07 01:02:24,565 INFO L226 Difference]: Without dead ends: 19253 [2021-11-07 01:02:24,584 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 01:02:24,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19253 states. [2021-11-07 01:02:25,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19253 to 19130. [2021-11-07 01:02:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19130 states, 19128 states have (on average 1.8061480552070264) internal successors, (34548), 19129 states have internal predecessors, (34548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:25,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19130 states to 19130 states and 34548 transitions. [2021-11-07 01:02:25,915 INFO L78 Accepts]: Start accepts. Automaton has 19130 states and 34548 transitions. Word has length 66 [2021-11-07 01:02:25,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:25,915 INFO L470 AbstractCegarLoop]: Abstraction has 19130 states and 34548 transitions. [2021-11-07 01:02:25,915 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 01:02:25,916 INFO L276 IsEmpty]: Start isEmpty. Operand 19130 states and 34548 transitions. [2021-11-07 01:02:25,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:02:25,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:25,925 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 01:02:25,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:26,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:26,144 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:26,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:26,145 INFO L85 PathProgramCache]: Analyzing trace with hash 379863146, now seen corresponding path program 1 times [2021-11-07 01:02:26,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:26,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104875008] [2021-11-07 01:02:26,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:26,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:26,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:26,147 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:26,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:02:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:26,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:02:26,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:27,075 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 01:02:27,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:27,254 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 01:02:27,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:27,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104875008] [2021-11-07 01:02:27,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104875008] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:27,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:27,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:02:27,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128718988] [2021-11-07 01:02:27,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:02:27,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:27,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:02:27,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:02:27,257 INFO L87 Difference]: Start difference. First operand 19130 states and 34548 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 01:02:29,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:29,223 INFO L93 Difference]: Finished difference Result 56826 states and 102667 transitions. [2021-11-07 01:02:29,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:02:29,224 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 01:02:29,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:29,320 INFO L225 Difference]: With dead ends: 56826 [2021-11-07 01:02:29,321 INFO L226 Difference]: Without dead ends: 37879 [2021-11-07 01:02:29,350 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 01:02:29,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37879 states. [2021-11-07 01:02:32,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37879 to 37756. [2021-11-07 01:02:32,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37756 states, 37754 states have (on average 1.8033850717804736) internal successors, (68085), 37755 states have internal predecessors, (68085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:32,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37756 states to 37756 states and 68085 transitions. [2021-11-07 01:02:32,343 INFO L78 Accepts]: Start accepts. Automaton has 37756 states and 68085 transitions. Word has length 67 [2021-11-07 01:02:32,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:32,343 INFO L470 AbstractCegarLoop]: Abstraction has 37756 states and 68085 transitions. [2021-11-07 01:02:32,344 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 01:02:32,344 INFO L276 IsEmpty]: Start isEmpty. Operand 37756 states and 68085 transitions. [2021-11-07 01:02:32,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:02:32,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:32,354 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 01:02:32,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:32,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:32,573 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:32,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:32,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1114840042, now seen corresponding path program 1 times [2021-11-07 01:02:32,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:32,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047898909] [2021-11-07 01:02:32,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:32,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:32,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:32,575 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:32,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:02:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:33,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:02:33,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:33,674 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 01:02:33,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:33,944 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 01:02:33,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:33,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047898909] [2021-11-07 01:02:33,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047898909] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:33,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:33,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:02:33,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51512258] [2021-11-07 01:02:33,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:02:33,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:33,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:02:33,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:02:33,948 INFO L87 Difference]: Start difference. First operand 37756 states and 68085 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 01:02:41,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:41,397 INFO L93 Difference]: Finished difference Result 146433 states and 263908 transitions. [2021-11-07 01:02:41,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:02:41,398 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 01:02:41,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:41,702 INFO L225 Difference]: With dead ends: 146433 [2021-11-07 01:02:41,702 INFO L226 Difference]: Without dead ends: 108926 [2021-11-07 01:02:41,763 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 01:02:41,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108926 states. [2021-11-07 01:02:45,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108926 to 37498. [2021-11-07 01:02:45,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37498 states, 37496 states have (on average 1.7882707488798806) internal successors, (67053), 37497 states have internal predecessors, (67053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37498 states to 37498 states and 67053 transitions. [2021-11-07 01:02:45,963 INFO L78 Accepts]: Start accepts. Automaton has 37498 states and 67053 transitions. Word has length 68 [2021-11-07 01:02:45,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:45,963 INFO L470 AbstractCegarLoop]: Abstraction has 37498 states and 67053 transitions. [2021-11-07 01:02:45,964 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 01:02:45,964 INFO L276 IsEmpty]: Start isEmpty. Operand 37498 states and 67053 transitions. [2021-11-07 01:02:45,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:02:45,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:45,972 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 01:02:45,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:46,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:46,191 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:46,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:46,192 INFO L85 PathProgramCache]: Analyzing trace with hash 119243832, now seen corresponding path program 1 times [2021-11-07 01:02:46,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:46,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191793172] [2021-11-07 01:02:46,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:46,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:46,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:46,194 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:46,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:02:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:47,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:02:47,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:47,202 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 01:02:47,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:47,396 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 01:02:47,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:47,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191793172] [2021-11-07 01:02:47,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191793172] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:47,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:47,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:02:47,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190922162] [2021-11-07 01:02:47,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:02:47,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:47,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:02:47,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:02:47,400 INFO L87 Difference]: Start difference. First operand 37498 states and 67053 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 01:02:49,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:49,809 INFO L93 Difference]: Finished difference Result 74864 states and 133887 transitions. [2021-11-07 01:02:49,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:02:49,811 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 01:02:49,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:49,882 INFO L225 Difference]: With dead ends: 74864 [2021-11-07 01:02:49,883 INFO L226 Difference]: Without dead ends: 37621 [2021-11-07 01:02:49,914 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 01:02:49,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37621 states. [2021-11-07 01:02:52,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37621 to 37498. [2021-11-07 01:02:52,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37498 states, 37496 states have (on average 1.784857051418818) internal successors, (66925), 37497 states have internal predecessors, (66925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37498 states to 37498 states and 66925 transitions. [2021-11-07 01:02:52,315 INFO L78 Accepts]: Start accepts. Automaton has 37498 states and 66925 transitions. Word has length 68 [2021-11-07 01:02:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:52,315 INFO L470 AbstractCegarLoop]: Abstraction has 37498 states and 66925 transitions. [2021-11-07 01:02:52,315 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 01:02:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 37498 states and 66925 transitions. [2021-11-07 01:02:52,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:02:52,322 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:52,323 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 01:02:52,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:52,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:52,528 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:52,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:52,529 INFO L85 PathProgramCache]: Analyzing trace with hash -840224597, now seen corresponding path program 1 times [2021-11-07 01:02:52,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:52,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573093517] [2021-11-07 01:02:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:52,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:52,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:52,530 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:52,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:02:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:53,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:02:53,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:53,480 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 01:02:53,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:53,665 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 01:02:53,665 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:53,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573093517] [2021-11-07 01:02:53,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573093517] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:53,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:53,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:02:53,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432024300] [2021-11-07 01:02:53,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:02:53,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:53,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:02:53,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:02:53,667 INFO L87 Difference]: Start difference. First operand 37498 states and 66925 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 01:02:57,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:57,457 INFO L93 Difference]: Finished difference Result 104090 states and 185417 transitions. [2021-11-07 01:02:57,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:02:57,458 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 01:02:57,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:57,581 INFO L225 Difference]: With dead ends: 104090 [2021-11-07 01:02:57,581 INFO L226 Difference]: Without dead ends: 66807 [2021-11-07 01:02:57,616 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 01:02:57,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66807 states. [2021-11-07 01:03:02,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66807 to 66684. [2021-11-07 01:03:02,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66684 states, 66682 states have (on average 1.7753216760145167) internal successors, (118382), 66683 states have internal predecessors, (118382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:02,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66684 states to 66684 states and 118382 transitions. [2021-11-07 01:03:02,574 INFO L78 Accepts]: Start accepts. Automaton has 66684 states and 118382 transitions. Word has length 68 [2021-11-07 01:03:02,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:02,575 INFO L470 AbstractCegarLoop]: Abstraction has 66684 states and 118382 transitions. [2021-11-07 01:03:02,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:02,575 INFO L276 IsEmpty]: Start isEmpty. Operand 66684 states and 118382 transitions. [2021-11-07 01:03:02,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:03:02,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:02,580 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:02,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:02,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:02,781 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:02,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:02,782 INFO L85 PathProgramCache]: Analyzing trace with hash -577582798, now seen corresponding path program 1 times [2021-11-07 01:03:02,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:02,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251932055] [2021-11-07 01:03:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:02,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:02,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:02,784 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:02,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:03:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:03,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:03:03,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:03,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:04,145 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:04,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251932055] [2021-11-07 01:03:04,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251932055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:04,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1965363799] [2021-11-07 01:03:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:04,147 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:04,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:03:04,152 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:03:04,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b380ab98-1c3e-4d09-97b5-c9aad4924f44/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:03:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:05,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:03:05,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:03:05,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:03:05,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1965363799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:05,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:03:05,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:03:05,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931707168] [2021-11-07 01:03:05,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:03:05,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:05,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:03:05,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:03:05,828 INFO L87 Difference]: Start difference. First operand 66684 states and 118382 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 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)