./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec27_product18.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_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/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_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/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_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/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 e1a1a15d818854b6fd39e860ed8f86805463715275e4ae9feedab248e5877daf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:19:41,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:19:41,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:19:41,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:19:41,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:19:41,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:19:41,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:19:41,074 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:19:41,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:19:41,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:19:41,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:19:41,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:19:41,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:19:41,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:19:41,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:19:41,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:19:41,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:19:41,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:19:41,100 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:19:41,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:19:41,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:19:41,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:19:41,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:19:41,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:19:41,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:19:41,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:19:41,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:19:41,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:19:41,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:19:41,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:19:41,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:19:41,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:19:41,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:19:41,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:19:41,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:19:41,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:19:41,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:19:41,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:19:41,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:19:41,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:19:41,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:19:41,141 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:19:41,184 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:19:41,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:19:41,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:19:41,186 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:19:41,187 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:19:41,187 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:19:41,187 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:19:41,188 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:19:41,194 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:19:41,195 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:19:41,196 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:19:41,196 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:19:41,196 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:19:41,197 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:19:41,197 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:19:41,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:19:41,198 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:19:41,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:19:41,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:19:41,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:19:41,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:19:41,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:19:41,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:19:41,200 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:19:41,200 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:19:41,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:19:41,201 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:19:41,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:19:41,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:19:41,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:19:41,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:19:41,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:19:41,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:19:41,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:19:41,204 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:19:41,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:19:41,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:19:41,205 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:19:41,205 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:19:41,205 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_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1a1a15d818854b6fd39e860ed8f86805463715275e4ae9feedab248e5877daf [2021-11-07 01:19:41,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:19:41,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:19:41,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:19:41,576 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:19:41,577 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:19:41,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product18.cil.c [2021-11-07 01:19:41,649 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/data/8c787897e/e77f3e872825469dad3134ea9e0e7568/FLAGfe8806655 [2021-11-07 01:19:42,333 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:19:42,334 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/sv-benchmarks/c/product-lines/email_spec27_product18.cil.c [2021-11-07 01:19:42,363 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/data/8c787897e/e77f3e872825469dad3134ea9e0e7568/FLAGfe8806655 [2021-11-07 01:19:42,518 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/data/8c787897e/e77f3e872825469dad3134ea9e0e7568 [2021-11-07 01:19:42,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:19:42,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:19:42,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:19:42,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:19:42,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:19:42,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:19:42" (1/1) ... [2021-11-07 01:19:42,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e953cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:42, skipping insertion in model container [2021-11-07 01:19:42,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:19:42" (1/1) ... [2021-11-07 01:19:42,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:19:42,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:19:43,319 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_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/sv-benchmarks/c/product-lines/email_spec27_product18.cil.c[62382,62395] [2021-11-07 01:19:43,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:19:43,345 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 01:19:43,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1243b070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:43, skipping insertion in model container [2021-11-07 01:19:43,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:19:43,347 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:19:43,350 INFO L168 Benchmark]: Toolchain (without parser) took 826.21 ms. Allocated memory is still 90.2 MB. Free memory was 68.0 MB in the beginning and 54.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:19:43,352 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 90.2 MB. Free memory is still 66.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:19:43,354 INFO L168 Benchmark]: CACSL2BoogieTranslator took 822.09 ms. Allocated memory is still 90.2 MB. Free memory was 67.9 MB in the beginning and 54.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:19:43,356 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 90.2 MB. Free memory is still 66.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 822.09 ms. Allocated memory is still 90.2 MB. Free memory was 67.9 MB in the beginning and 54.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 392]: 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_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/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_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/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_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/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 e1a1a15d818854b6fd39e860ed8f86805463715275e4ae9feedab248e5877daf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:19:45,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:19:45,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:19:45,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:19:45,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:19:45,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:19:45,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:19:45,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:19:45,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:19:45,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:19:45,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:19:45,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:19:45,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:19:45,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:19:45,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:19:45,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:19:45,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:19:45,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:19:45,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:19:45,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:19:45,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:19:45,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:19:45,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:19:45,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:19:45,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:19:45,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:19:45,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:19:45,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:19:45,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:19:45,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:19:45,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:19:45,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:19:45,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:19:45,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:19:45,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:19:45,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:19:45,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:19:45,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:19:45,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:19:45,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:19:45,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:19:45,758 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:19:45,800 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:19:45,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:19:45,801 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:19:45,802 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:19:45,802 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:19:45,802 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:19:45,802 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:19:45,803 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:19:45,804 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:19:45,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:19:45,806 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:19:45,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:19:45,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:19:45,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:19:45,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:19:45,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:19:45,808 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:19:45,808 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:19:45,808 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:19:45,808 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:19:45,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:19:45,809 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:19:45,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:19:45,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:19:45,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:19:45,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:19:45,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:19:45,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:19:45,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:19:45,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:19:45,811 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:19:45,811 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:19:45,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:19:45,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:19:45,812 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:19:45,812 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_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1a1a15d818854b6fd39e860ed8f86805463715275e4ae9feedab248e5877daf [2021-11-07 01:19:46,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:19:46,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:19:46,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:19:46,331 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:19:46,331 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:19:46,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product18.cil.c [2021-11-07 01:19:46,407 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/data/0359b4f82/fe0d654ae5524152a809a261617056f0/FLAGea1e327c7 [2021-11-07 01:19:47,136 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:19:47,137 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/sv-benchmarks/c/product-lines/email_spec27_product18.cil.c [2021-11-07 01:19:47,172 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/data/0359b4f82/fe0d654ae5524152a809a261617056f0/FLAGea1e327c7 [2021-11-07 01:19:47,295 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/data/0359b4f82/fe0d654ae5524152a809a261617056f0 [2021-11-07 01:19:47,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:19:47,308 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:19:47,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:19:47,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:19:47,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:19:47,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:19:47" (1/1) ... [2021-11-07 01:19:47,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d2ad7f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:47, skipping insertion in model container [2021-11-07 01:19:47,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:19:47" (1/1) ... [2021-11-07 01:19:47,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:19:47,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:19:48,179 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_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/sv-benchmarks/c/product-lines/email_spec27_product18.cil.c[62382,62395] [2021-11-07 01:19:48,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:19:48,205 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:19:48,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:19:48,377 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_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/sv-benchmarks/c/product-lines/email_spec27_product18.cil.c[62382,62395] [2021-11-07 01:19:48,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:19:48,387 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:19:48,454 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_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/sv-benchmarks/c/product-lines/email_spec27_product18.cil.c[62382,62395] [2021-11-07 01:19:48,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:19:48,491 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:19:48,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:48 WrapperNode [2021-11-07 01:19:48,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:19:48,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:19:48,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:19:48,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:19:48,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:48" (1/1) ... [2021-11-07 01:19:48,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:48" (1/1) ... [2021-11-07 01:19:48,678 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:19:48,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:19:48,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:19:48,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:19:48,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:48" (1/1) ... [2021-11-07 01:19:48,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:48" (1/1) ... [2021-11-07 01:19:48,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:48" (1/1) ... [2021-11-07 01:19:48,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:48" (1/1) ... [2021-11-07 01:19:48,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:48" (1/1) ... [2021-11-07 01:19:48,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:48" (1/1) ... [2021-11-07 01:19:48,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:48" (1/1) ... [2021-11-07 01:19:48,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:19:48,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:19:48,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:19:48,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:19:48,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:48" (1/1) ... [2021-11-07 01:19:48,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:19:48,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:19:48,832 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:19:48,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:19:48,882 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:19:48,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:19:48,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:19:48,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:19:48,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:19:53,200 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:19:53,200 INFO L299 CfgBuilder]: Removed 267 assume(true) statements. [2021-11-07 01:19:53,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:19:53 BoogieIcfgContainer [2021-11-07 01:19:53,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:19:53,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:19:53,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:19:53,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:19:53,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:19:47" (1/3) ... [2021-11-07 01:19:53,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@709a704e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:19:53, skipping insertion in model container [2021-11-07 01:19:53,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:48" (2/3) ... [2021-11-07 01:19:53,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@709a704e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:19:53, skipping insertion in model container [2021-11-07 01:19:53,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:19:53" (3/3) ... [2021-11-07 01:19:53,213 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product18.cil.c [2021-11-07 01:19:53,219 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:19:53,219 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:19:53,287 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:19:53,294 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 01:19:53,294 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:19:53,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 429 states, 426 states have (on average 1.7699530516431925) internal successors, (754), 428 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:19:53,338 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:53,339 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 01:19:53,339 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:53,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:53,345 INFO L85 PathProgramCache]: Analyzing trace with hash -167129029, now seen corresponding path program 1 times [2021-11-07 01:19:53,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:53,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369357837] [2021-11-07 01:19:53,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:53,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:53,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:53,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:53,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:19:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:53,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:19:53,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:54,059 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 01:19:54,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:54,211 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 01:19:54,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:54,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369357837] [2021-11-07 01:19:54,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369357837] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:54,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:54,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:19:54,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119609504] [2021-11-07 01:19:54,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:19:54,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:54,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:19:54,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:19:54,264 INFO L87 Difference]: Start difference. First operand has 429 states, 426 states have (on average 1.7699530516431925) internal successors, (754), 428 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:54,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:54,366 INFO L93 Difference]: Finished difference Result 616 states and 1067 transitions. [2021-11-07 01:19:54,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:19:54,368 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:19:54,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:54,395 INFO L225 Difference]: With dead ends: 616 [2021-11-07 01:19:54,395 INFO L226 Difference]: Without dead ends: 412 [2021-11-07 01:19:54,400 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:19:54,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-07 01:19:54,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2021-11-07 01:19:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 410 states have (on average 1.7609756097560976) internal successors, (722), 411 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 722 transitions. [2021-11-07 01:19:54,505 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 722 transitions. Word has length 48 [2021-11-07 01:19:54,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:54,506 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 722 transitions. [2021-11-07 01:19:54,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:54,506 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 722 transitions. [2021-11-07 01:19:54,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:19:54,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:54,510 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:54,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:54,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:54,718 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:54,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1593484696, now seen corresponding path program 1 times [2021-11-07 01:19:54,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:54,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763597113] [2021-11-07 01:19:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:54,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:54,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:54,722 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:54,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:19:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:55,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:19:55,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:55,257 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 01:19:55,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:55,392 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 01:19:55,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:55,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763597113] [2021-11-07 01:19:55,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763597113] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:55,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:55,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:19:55,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347604760] [2021-11-07 01:19:55,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:19:55,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:55,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:19:55,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:19:55,398 INFO L87 Difference]: Start difference. First operand 412 states and 722 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 01:19:55,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:55,607 INFO L93 Difference]: Finished difference Result 1206 states and 2118 transitions. [2021-11-07 01:19:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:19:55,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:19:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:55,614 INFO L225 Difference]: With dead ends: 1206 [2021-11-07 01:19:55,614 INFO L226 Difference]: Without dead ends: 809 [2021-11-07 01:19:55,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:19:55,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-11-07 01:19:55,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 411. [2021-11-07 01:19:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 409 states have (on average 1.7530562347188263) internal successors, (717), 410 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 717 transitions. [2021-11-07 01:19:55,660 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 717 transitions. Word has length 49 [2021-11-07 01:19:55,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:55,661 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 717 transitions. [2021-11-07 01:19:55,662 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 01:19:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 717 transitions. [2021-11-07 01:19:55,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:19:55,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:55,672 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:55,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:19:55,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:55,886 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:55,887 INFO L85 PathProgramCache]: Analyzing trace with hash 42991054, now seen corresponding path program 1 times [2021-11-07 01:19:55,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:55,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576492456] [2021-11-07 01:19:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:55,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:55,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:55,890 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:55,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:19:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:56,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:19:56,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:56,463 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 01:19:56,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:56,648 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 01:19:56,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:56,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576492456] [2021-11-07 01:19:56,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576492456] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:56,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:56,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:19:56,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485930834] [2021-11-07 01:19:56,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:19:56,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:56,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:19:56,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:19:56,651 INFO L87 Difference]: Start difference. First operand 411 states and 717 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:56,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:56,869 INFO L93 Difference]: Finished difference Result 1561 states and 2730 transitions. [2021-11-07 01:19:56,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:19:56,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:19:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:56,877 INFO L225 Difference]: With dead ends: 1561 [2021-11-07 01:19:56,877 INFO L226 Difference]: Without dead ends: 1168 [2021-11-07 01:19:56,879 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:19:56,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-11-07 01:19:56,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 410. [2021-11-07 01:19:56,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 408 states have (on average 1.7475490196078431) internal successors, (713), 409 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 713 transitions. [2021-11-07 01:19:56,913 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 713 transitions. Word has length 51 [2021-11-07 01:19:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:56,913 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 713 transitions. [2021-11-07 01:19:56,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:56,914 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 713 transitions. [2021-11-07 01:19:56,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:19:56,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:56,916 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:56,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:57,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:57,133 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:57,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:57,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1661226655, now seen corresponding path program 1 times [2021-11-07 01:19:57,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:57,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264589398] [2021-11-07 01:19:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:57,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:57,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:57,139 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:57,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:19:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:57,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:19:57,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:57,804 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 01:19:57,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:57,995 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 01:19:57,995 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:57,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264589398] [2021-11-07 01:19:57,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264589398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:57,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:57,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:19:57,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732223635] [2021-11-07 01:19:57,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:19:57,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:57,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:19:58,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:19:58,000 INFO L87 Difference]: Start difference. First operand 410 states and 713 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:58,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:58,063 INFO L93 Difference]: Finished difference Result 817 states and 1423 transitions. [2021-11-07 01:19:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:19:58,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 01:19:58,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:58,067 INFO L225 Difference]: With dead ends: 817 [2021-11-07 01:19:58,067 INFO L226 Difference]: Without dead ends: 415 [2021-11-07 01:19:58,068 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:19:58,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-11-07 01:19:58,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 410. [2021-11-07 01:19:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 408 states have (on average 1.7401960784313726) internal successors, (710), 409 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:58,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 710 transitions. [2021-11-07 01:19:58,097 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 710 transitions. Word has length 52 [2021-11-07 01:19:58,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:58,100 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 710 transitions. [2021-11-07 01:19:58,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:58,100 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 710 transitions. [2021-11-07 01:19:58,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:19:58,103 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:58,103 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:58,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:58,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:58,319 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:58,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:58,320 INFO L85 PathProgramCache]: Analyzing trace with hash -755664714, now seen corresponding path program 1 times [2021-11-07 01:19:58,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:58,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616237098] [2021-11-07 01:19:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:58,322 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:58,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:58,324 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:58,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:19:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:58,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:19:58,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:58,945 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 01:19:58,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:59,103 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 01:19:59,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:59,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616237098] [2021-11-07 01:19:59,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616237098] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:59,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:59,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:19:59,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586307807] [2021-11-07 01:19:59,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:19:59,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:59,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:19:59,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:19:59,106 INFO L87 Difference]: Start difference. First operand 410 states and 710 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:59,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:59,337 INFO L93 Difference]: Finished difference Result 1548 states and 2706 transitions. [2021-11-07 01:19:59,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:19:59,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:19:59,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:59,345 INFO L225 Difference]: With dead ends: 1548 [2021-11-07 01:19:59,345 INFO L226 Difference]: Without dead ends: 1164 [2021-11-07 01:19:59,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:19:59,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-11-07 01:19:59,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 410. [2021-11-07 01:19:59,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 408 states have (on average 1.732843137254902) internal successors, (707), 409 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 707 transitions. [2021-11-07 01:19:59,381 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 707 transitions. Word has length 53 [2021-11-07 01:19:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:59,382 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 707 transitions. [2021-11-07 01:19:59,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:59,382 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 707 transitions. [2021-11-07 01:19:59,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:19:59,383 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:59,383 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:59,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:59,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:59,598 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:59,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:59,598 INFO L85 PathProgramCache]: Analyzing trace with hash -314537551, now seen corresponding path program 1 times [2021-11-07 01:19:59,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:59,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047994630] [2021-11-07 01:19:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:59,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:59,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:59,601 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:59,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:20:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:00,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:00,192 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 01:20:00,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:00,327 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 01:20:00,327 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:00,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047994630] [2021-11-07 01:20:00,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047994630] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:00,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:00,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:20:00,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935323224] [2021-11-07 01:20:00,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:00,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:00,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:00,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:00,329 INFO L87 Difference]: Start difference. First operand 410 states and 707 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:00,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:00,398 INFO L93 Difference]: Finished difference Result 964 states and 1668 transitions. [2021-11-07 01:20:00,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:20:00,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:20:00,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:00,404 INFO L225 Difference]: With dead ends: 964 [2021-11-07 01:20:00,404 INFO L226 Difference]: Without dead ends: 794 [2021-11-07 01:20:00,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:00,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-11-07 01:20:00,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 624. [2021-11-07 01:20:00,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 622 states have (on average 1.765273311897106) internal successors, (1098), 623 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:00,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1098 transitions. [2021-11-07 01:20:00,449 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1098 transitions. Word has length 55 [2021-11-07 01:20:00,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:00,449 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 1098 transitions. [2021-11-07 01:20:00,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:00,450 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1098 transitions. [2021-11-07 01:20:00,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:20:00,451 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:00,451 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 01:20:00,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:00,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:00,665 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:00,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:00,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1046530370, now seen corresponding path program 1 times [2021-11-07 01:20:00,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:00,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773126798] [2021-11-07 01:20:00,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:00,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:00,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:00,670 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:00,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:20:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:01,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:01,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:01,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:01,546 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 01:20:01,546 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:01,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773126798] [2021-11-07 01:20:01,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773126798] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:01,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:01,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:01,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334280062] [2021-11-07 01:20:01,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:01,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:01,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:01,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:01,549 INFO L87 Difference]: Start difference. First operand 624 states and 1098 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 01:20:01,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:01,636 INFO L93 Difference]: Finished difference Result 1496 states and 2642 transitions. [2021-11-07 01:20:01,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:01,637 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 01:20:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:01,644 INFO L225 Difference]: With dead ends: 1496 [2021-11-07 01:20:01,644 INFO L226 Difference]: Without dead ends: 956 [2021-11-07 01:20:01,662 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 01:20:01,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-11-07 01:20:01,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 786. [2021-11-07 01:20:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 784 states have (on average 1.7755102040816326) internal successors, (1392), 785 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:01,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1392 transitions. [2021-11-07 01:20:01,739 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1392 transitions. Word has length 67 [2021-11-07 01:20:01,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:01,739 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 1392 transitions. [2021-11-07 01:20:01,740 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 01:20:01,740 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1392 transitions. [2021-11-07 01:20:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:20:01,742 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:01,742 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 01:20:01,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:01,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:01,959 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:01,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:01,959 INFO L85 PathProgramCache]: Analyzing trace with hash -576332383, now seen corresponding path program 1 times [2021-11-07 01:20:01,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:01,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698228146] [2021-11-07 01:20:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:01,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:01,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:01,962 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:02,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:20:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:02,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:02,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:02,636 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 01:20:02,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:02,802 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 01:20:02,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:02,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698228146] [2021-11-07 01:20:02,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698228146] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:02,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:02,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:02,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768043046] [2021-11-07 01:20:02,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:02,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:02,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:02,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:02,805 INFO L87 Difference]: Start difference. First operand 786 states and 1392 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 01:20:02,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:02,922 INFO L93 Difference]: Finished difference Result 2014 states and 3589 transitions. [2021-11-07 01:20:02,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:02,922 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 01:20:02,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:02,931 INFO L225 Difference]: With dead ends: 2014 [2021-11-07 01:20:02,931 INFO L226 Difference]: Without dead ends: 1320 [2021-11-07 01:20:02,934 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 01:20:02,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-11-07 01:20:03,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1150. [2021-11-07 01:20:03,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1148 states have (on average 1.7909407665505226) internal successors, (2056), 1149 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:03,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 2056 transitions. [2021-11-07 01:20:03,054 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 2056 transitions. Word has length 68 [2021-11-07 01:20:03,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:03,055 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 2056 transitions. [2021-11-07 01:20:03,055 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 01:20:03,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 2056 transitions. [2021-11-07 01:20:03,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:20:03,058 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:03,058 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:03,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:03,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:03,274 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:03,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:03,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1761324656, now seen corresponding path program 1 times [2021-11-07 01:20:03,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:03,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454600683] [2021-11-07 01:20:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:03,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:03,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:03,276 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:03,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:20:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:03,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:03,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:04,004 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 01:20:04,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:04,216 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 01:20:04,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:04,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454600683] [2021-11-07 01:20:04,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454600683] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:04,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:04,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:04,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312438094] [2021-11-07 01:20:04,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:04,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:04,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:04,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:04,219 INFO L87 Difference]: Start difference. First operand 1150 states and 2056 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:04,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:04,401 INFO L93 Difference]: Finished difference Result 3086 states and 5550 transitions. [2021-11-07 01:20:04,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:04,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:20:04,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:04,416 INFO L225 Difference]: With dead ends: 3086 [2021-11-07 01:20:04,416 INFO L226 Difference]: Without dead ends: 2036 [2021-11-07 01:20:04,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:04,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-11-07 01:20:04,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1866. [2021-11-07 01:20:04,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1864 states have (on average 1.8041845493562232) internal successors, (3363), 1865 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:04,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 3363 transitions. [2021-11-07 01:20:04,603 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 3363 transitions. Word has length 69 [2021-11-07 01:20:04,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:04,603 INFO L470 AbstractCegarLoop]: Abstraction has 1866 states and 3363 transitions. [2021-11-07 01:20:04,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:04,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 3363 transitions. [2021-11-07 01:20:04,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:20:04,609 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:04,609 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:04,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:04,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:04,830 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:04,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:04,831 INFO L85 PathProgramCache]: Analyzing trace with hash -745059344, now seen corresponding path program 1 times [2021-11-07 01:20:04,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:04,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153986272] [2021-11-07 01:20:04,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:04,832 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:04,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:04,833 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:04,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:20:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:05,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:05,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:05,591 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 01:20:05,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:05,756 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 01:20:05,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:05,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153986272] [2021-11-07 01:20:05,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153986272] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:05,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:05,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:05,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994243] [2021-11-07 01:20:05,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:05,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:05,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:05,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:05,759 INFO L87 Difference]: Start difference. First operand 1866 states and 3363 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:06,025 INFO L93 Difference]: Finished difference Result 4970 states and 8990 transitions. [2021-11-07 01:20:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:06,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:20:06,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:06,049 INFO L225 Difference]: With dead ends: 4970 [2021-11-07 01:20:06,049 INFO L226 Difference]: Without dead ends: 3238 [2021-11-07 01:20:06,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:06,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3238 states. [2021-11-07 01:20:06,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3238 to 3068. [2021-11-07 01:20:06,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 3066 states have (on average 1.8108284409654272) internal successors, (5552), 3067 states have internal predecessors, (5552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 5552 transitions. [2021-11-07 01:20:06,332 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 5552 transitions. Word has length 70 [2021-11-07 01:20:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:06,332 INFO L470 AbstractCegarLoop]: Abstraction has 3068 states and 5552 transitions. [2021-11-07 01:20:06,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 5552 transitions. [2021-11-07 01:20:06,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:20:06,358 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:06,358 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:06,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:06,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:06,572 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:06,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:06,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1574191137, now seen corresponding path program 1 times [2021-11-07 01:20:06,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:06,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135926771] [2021-11-07 01:20:06,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:06,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:06,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:06,575 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:06,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:20:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:07,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:07,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:07,273 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 01:20:07,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:07,432 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 01:20:07,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:07,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135926771] [2021-11-07 01:20:07,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135926771] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:07,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:07,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:07,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889575549] [2021-11-07 01:20:07,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:07,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:07,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:07,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:07,435 INFO L87 Difference]: Start difference. First operand 3068 states and 5552 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:07,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:07,845 INFO L93 Difference]: Finished difference Result 8292 states and 15040 transitions. [2021-11-07 01:20:07,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:07,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:20:07,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:07,881 INFO L225 Difference]: With dead ends: 8292 [2021-11-07 01:20:07,881 INFO L226 Difference]: Without dead ends: 5392 [2021-11-07 01:20:07,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:07,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5392 states. [2021-11-07 01:20:08,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5392 to 5222. [2021-11-07 01:20:08,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5222 states, 5220 states have (on average 1.8132183908045978) internal successors, (9465), 5221 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:08,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5222 states to 5222 states and 9465 transitions. [2021-11-07 01:20:08,352 INFO L78 Accepts]: Start accepts. Automaton has 5222 states and 9465 transitions. Word has length 71 [2021-11-07 01:20:08,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:08,354 INFO L470 AbstractCegarLoop]: Abstraction has 5222 states and 9465 transitions. [2021-11-07 01:20:08,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:08,355 INFO L276 IsEmpty]: Start isEmpty. Operand 5222 states and 9465 transitions. [2021-11-07 01:20:08,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:20:08,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:08,362 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:08,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:08,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:08,580 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:08,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:08,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1919847553, now seen corresponding path program 1 times [2021-11-07 01:20:08,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:08,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1399514376] [2021-11-07 01:20:08,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:08,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:08,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:08,584 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:08,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:20:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:09,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:09,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:09,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:09,650 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 01:20:09,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:09,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1399514376] [2021-11-07 01:20:09,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1399514376] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:09,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:09,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:09,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867871497] [2021-11-07 01:20:09,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:09,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:09,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:09,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:09,653 INFO L87 Difference]: Start difference. First operand 5222 states and 9465 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:10,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:10,201 INFO L93 Difference]: Finished difference Result 15212 states and 27621 transitions. [2021-11-07 01:20:10,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:10,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:20:10,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:10,264 INFO L225 Difference]: With dead ends: 15212 [2021-11-07 01:20:10,264 INFO L226 Difference]: Without dead ends: 10162 [2021-11-07 01:20:10,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:10,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10162 states. [2021-11-07 01:20:11,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10162 to 9992. [2021-11-07 01:20:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9992 states, 9990 states have (on average 1.814014014014014) internal successors, (18122), 9991 states have internal predecessors, (18122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:11,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9992 states to 9992 states and 18122 transitions. [2021-11-07 01:20:11,113 INFO L78 Accepts]: Start accepts. Automaton has 9992 states and 18122 transitions. Word has length 72 [2021-11-07 01:20:11,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:11,114 INFO L470 AbstractCegarLoop]: Abstraction has 9992 states and 18122 transitions. [2021-11-07 01:20:11,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 9992 states and 18122 transitions. [2021-11-07 01:20:11,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:20:11,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:11,126 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:11,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:11,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:11,340 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:11,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:11,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1810112431, now seen corresponding path program 1 times [2021-11-07 01:20:11,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:11,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012369952] [2021-11-07 01:20:11,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:11,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:11,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:11,343 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:11,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:20:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:11,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:20:11,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:12,214 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 01:20:12,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:12,484 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 01:20:12,484 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:12,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012369952] [2021-11-07 01:20:12,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012369952] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:12,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:12,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:20:12,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350822081] [2021-11-07 01:20:12,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:20:12,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:12,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:20:12,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:20:12,487 INFO L87 Difference]: Start difference. First operand 9992 states and 18122 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:15,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:15,619 INFO L93 Difference]: Finished difference Result 24607 states and 44645 transitions. [2021-11-07 01:20:15,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:20:15,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:20:15,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:15,666 INFO L225 Difference]: With dead ends: 24607 [2021-11-07 01:20:15,667 INFO L226 Difference]: Without dead ends: 14865 [2021-11-07 01:20:15,680 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:20:15,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14865 states. [2021-11-07 01:20:16,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14865 to 9959. [2021-11-07 01:20:16,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9959 states, 9957 states have (on average 1.8067691071607914) internal successors, (17990), 9958 states have internal predecessors, (17990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:16,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9959 states to 9959 states and 17990 transitions. [2021-11-07 01:20:16,444 INFO L78 Accepts]: Start accepts. Automaton has 9959 states and 17990 transitions. Word has length 73 [2021-11-07 01:20:16,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:16,445 INFO L470 AbstractCegarLoop]: Abstraction has 9959 states and 17990 transitions. [2021-11-07 01:20:16,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:16,445 INFO L276 IsEmpty]: Start isEmpty. Operand 9959 states and 17990 transitions. [2021-11-07 01:20:16,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:20:16,454 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:16,454 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:16,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:16,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:16,670 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:16,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:16,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1449427056, now seen corresponding path program 1 times [2021-11-07 01:20:16,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:16,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407093866] [2021-11-07 01:20:16,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:16,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:16,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:16,672 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:16,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:20:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:17,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:17,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:17,457 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 01:20:17,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:17,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:17,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407093866] [2021-11-07 01:20:17,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407093866] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:17,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:17,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:17,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429105142] [2021-11-07 01:20:17,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:17,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:17,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:17,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:17,632 INFO L87 Difference]: Start difference. First operand 9959 states and 17990 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:18,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:18,731 INFO L93 Difference]: Finished difference Result 29127 states and 52679 transitions. [2021-11-07 01:20:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:18,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:20:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:18,780 INFO L225 Difference]: With dead ends: 29127 [2021-11-07 01:20:18,780 INFO L226 Difference]: Without dead ends: 19347 [2021-11-07 01:20:18,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:18,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19347 states. [2021-11-07 01:20:19,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19347 to 19177. [2021-11-07 01:20:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19177 states, 19175 states have (on average 1.8060495436766624) internal successors, (34631), 19176 states have internal predecessors, (34631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:20,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19177 states to 19177 states and 34631 transitions. [2021-11-07 01:20:20,003 INFO L78 Accepts]: Start accepts. Automaton has 19177 states and 34631 transitions. Word has length 73 [2021-11-07 01:20:20,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:20,004 INFO L470 AbstractCegarLoop]: Abstraction has 19177 states and 34631 transitions. [2021-11-07 01:20:20,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:20,004 INFO L276 IsEmpty]: Start isEmpty. Operand 19177 states and 34631 transitions. [2021-11-07 01:20:20,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:20:20,015 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:20,015 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:20,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:20,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:20,233 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:20,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:20,234 INFO L85 PathProgramCache]: Analyzing trace with hash 311731011, now seen corresponding path program 1 times [2021-11-07 01:20:20,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:20,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765698928] [2021-11-07 01:20:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:20,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:20,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:20,236 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:20,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:20:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:20,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:20,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:21,020 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 01:20:21,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:21,170 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 01:20:21,170 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:21,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765698928] [2021-11-07 01:20:21,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1765698928] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:21,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:21,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:21,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441517313] [2021-11-07 01:20:21,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:21,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:21,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:21,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:21,172 INFO L87 Difference]: Start difference. First operand 19177 states and 34631 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:22,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:22,695 INFO L93 Difference]: Finished difference Result 56967 states and 102916 transitions. [2021-11-07 01:20:22,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:22,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:20:22,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:22,788 INFO L225 Difference]: With dead ends: 56967 [2021-11-07 01:20:22,788 INFO L226 Difference]: Without dead ends: 37973 [2021-11-07 01:20:22,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:22,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37973 states. [2021-11-07 01:20:25,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37973 to 37803. [2021-11-07 01:20:25,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37803 states, 37801 states have (on average 1.8033385360175658) internal successors, (68168), 37802 states have internal predecessors, (68168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:25,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37803 states to 37803 states and 68168 transitions. [2021-11-07 01:20:25,315 INFO L78 Accepts]: Start accepts. Automaton has 37803 states and 68168 transitions. Word has length 74 [2021-11-07 01:20:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:25,315 INFO L470 AbstractCegarLoop]: Abstraction has 37803 states and 68168 transitions. [2021-11-07 01:20:25,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:25,315 INFO L276 IsEmpty]: Start isEmpty. Operand 37803 states and 68168 transitions. [2021-11-07 01:20:25,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:20:25,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:25,328 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:25,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:25,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:25,543 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:25,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:25,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2121742825, now seen corresponding path program 1 times [2021-11-07 01:20:25,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:25,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844427563] [2021-11-07 01:20:25,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:25,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:25,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:25,546 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:25,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:20:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:26,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:20:26,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:26,416 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 01:20:26,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:26,646 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 01:20:26,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:26,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844427563] [2021-11-07 01:20:26,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844427563] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:26,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:26,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:20:26,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521453127] [2021-11-07 01:20:26,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:20:26,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:26,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:20:26,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:20:26,648 INFO L87 Difference]: Start difference. First operand 37803 states and 68168 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:33,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:33,543 INFO L93 Difference]: Finished difference Result 146621 states and 264240 transitions. [2021-11-07 01:20:33,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:20:33,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:20:33,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:33,744 INFO L225 Difference]: With dead ends: 146621 [2021-11-07 01:20:33,744 INFO L226 Difference]: Without dead ends: 109067 [2021-11-07 01:20:33,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:20:33,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109067 states. [2021-11-07 01:20:36,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109067 to 37545. [2021-11-07 01:20:36,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37545 states, 37543 states have (on average 1.788242814905575) internal successors, (67136), 37544 states have internal predecessors, (67136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37545 states to 37545 states and 67136 transitions. [2021-11-07 01:20:36,713 INFO L78 Accepts]: Start accepts. Automaton has 37545 states and 67136 transitions. Word has length 75 [2021-11-07 01:20:36,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:36,714 INFO L470 AbstractCegarLoop]: Abstraction has 37545 states and 67136 transitions. [2021-11-07 01:20:36,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:36,714 INFO L276 IsEmpty]: Start isEmpty. Operand 37545 states and 67136 transitions. [2021-11-07 01:20:36,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:20:36,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:36,725 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:36,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:36,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:36,945 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:36,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:36,945 INFO L85 PathProgramCache]: Analyzing trace with hash -2077353035, now seen corresponding path program 1 times [2021-11-07 01:20:36,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:36,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228217606] [2021-11-07 01:20:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:36,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:36,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:36,947 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:36,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:20:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:37,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:37,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:37,828 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 01:20:37,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:38,004 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 01:20:38,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:38,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228217606] [2021-11-07 01:20:38,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228217606] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:38,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:38,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:20:38,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239221905] [2021-11-07 01:20:38,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:38,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:38,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:38,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:38,007 INFO L87 Difference]: Start difference. First operand 37545 states and 67136 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:40,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:40,123 INFO L93 Difference]: Finished difference Result 75005 states and 134136 transitions. [2021-11-07 01:20:40,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:40,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:20:40,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:40,187 INFO L225 Difference]: With dead ends: 75005 [2021-11-07 01:20:40,187 INFO L226 Difference]: Without dead ends: 37715 [2021-11-07 01:20:40,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:40,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37715 states. [2021-11-07 01:20:42,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37715 to 37545. [2021-11-07 01:20:42,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37545 states, 37543 states have (on average 1.7848333910449352) internal successors, (67008), 37544 states have internal predecessors, (67008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37545 states to 37545 states and 67008 transitions. [2021-11-07 01:20:42,334 INFO L78 Accepts]: Start accepts. Automaton has 37545 states and 67008 transitions. Word has length 75 [2021-11-07 01:20:42,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:42,335 INFO L470 AbstractCegarLoop]: Abstraction has 37545 states and 67008 transitions. [2021-11-07 01:20:42,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:42,335 INFO L276 IsEmpty]: Start isEmpty. Operand 37545 states and 67008 transitions. [2021-11-07 01:20:42,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:20:42,342 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:42,342 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:42,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:42,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:42,543 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:42,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:42,543 INFO L85 PathProgramCache]: Analyzing trace with hash 986453986, now seen corresponding path program 1 times [2021-11-07 01:20:42,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:42,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289337779] [2021-11-07 01:20:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:42,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:42,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:42,545 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:42,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:20:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:43,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:43,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:43,403 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 01:20:43,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:43,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:43,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289337779] [2021-11-07 01:20:43,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289337779] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:43,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:43,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:43,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106957681] [2021-11-07 01:20:43,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:43,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:43,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:43,576 INFO L87 Difference]: Start difference. First operand 37545 states and 67008 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:46,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:46,719 INFO L93 Difference]: Finished difference Result 104231 states and 185666 transitions. [2021-11-07 01:20:46,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:46,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:20:46,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:46,830 INFO L225 Difference]: With dead ends: 104231 [2021-11-07 01:20:46,830 INFO L226 Difference]: Without dead ends: 66901 [2021-11-07 01:20:46,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 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 01:20:46,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66901 states. [2021-11-07 01:20:50,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66901 to 66731. [2021-11-07 01:20:50,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66731 states, 66729 states have (on average 1.775315080399826) internal successors, (118465), 66730 states have internal predecessors, (118465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:50,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66731 states to 66731 states and 118465 transitions. [2021-11-07 01:20:50,542 INFO L78 Accepts]: Start accepts. Automaton has 66731 states and 118465 transitions. Word has length 75 [2021-11-07 01:20:50,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:50,543 INFO L470 AbstractCegarLoop]: Abstraction has 66731 states and 118465 transitions. [2021-11-07 01:20:50,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:50,543 INFO L276 IsEmpty]: Start isEmpty. Operand 66731 states and 118465 transitions. [2021-11-07 01:20:50,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:20:50,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:50,551 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:50,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:50,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:50,752 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:50,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:50,752 INFO L85 PathProgramCache]: Analyzing trace with hash 195570043, now seen corresponding path program 1 times [2021-11-07 01:20:50,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:50,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441831404] [2021-11-07 01:20:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:50,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:50,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:50,753 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:50,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:20:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:51,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:20:51,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:51,696 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 01:20:51,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:52,129 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 01:20:52,129 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:52,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441831404] [2021-11-07 01:20:52,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441831404] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:20:52,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [518134391] [2021-11-07 01:20:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:52,130 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:20:52,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:20:52,131 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:20:52,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5520bf-79fb-481a-bfe3-1ad6b370fe3d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:20:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:53,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:20:53,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:53,392 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 01:20:53,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:53,662 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 01:20:53,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [518134391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:53,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:20:53,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:20:53,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134819194] [2021-11-07 01:20:53,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:20:53,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:53,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:20:53,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:20:53,665 INFO L87 Difference]: Start difference. First operand 66731 states and 118465 transitions. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)