./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/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_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/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 64bit --witnessprinter.graph.data.programhash b83c28af83745ba79af1b1ebec4b495db7aa2efb3702685bbdc4b86421ef4c0a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:04:51,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:04:51,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:04:51,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:04:51,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:04:51,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:04:51,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:04:51,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:04:51,250 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:04:51,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:04:51,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:04:51,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:04:51,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:04:51,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:04:51,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:04:51,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:04:51,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:04:51,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:04:51,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:04:51,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:04:51,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:04:51,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:04:51,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:04:51,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:04:51,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:04:51,304 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:04:51,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:04:51,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:04:51,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:04:51,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:04:51,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:04:51,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:04:51,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:04:51,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:04:51,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:04:51,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:04:51,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:04:51,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:04:51,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:04:51,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:04:51,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:04:51,320 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 02:04:51,363 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:04:51,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:04:51,365 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:04:51,365 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:04:51,365 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:04:51,366 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:04:51,366 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:04:51,366 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:04:51,366 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:04:51,366 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:04:51,374 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:04:51,374 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:04:51,374 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:04:51,374 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:04:51,375 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:04:51,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:04:51,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:04:51,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:04:51,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:04:51,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:04:51,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:04:51,377 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:04:51,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:04:51,377 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:04:51,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:04:51,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:04:51,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:04:51,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:04:51,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:04:51,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:04:51,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:04:51,381 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:04:51,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:04:51,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:04:51,381 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:04:51,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:04:51,382 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_29075afd-9ad8-41ce-98e4-f1d6af186c23/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b83c28af83745ba79af1b1ebec4b495db7aa2efb3702685bbdc4b86421ef4c0a [2021-11-07 02:04:51,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:04:51,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:04:51,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:04:51,652 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:04:51,653 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:04:51,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 02:04:51,744 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/data/634ee57d0/bfe659d2c9a24adf87c2b20cbfba838c/FLAGee2dd5596 [2021-11-07 02:04:52,612 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:04:52,612 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 02:04:52,652 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/data/634ee57d0/bfe659d2c9a24adf87c2b20cbfba838c/FLAGee2dd5596 [2021-11-07 02:04:53,066 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/data/634ee57d0/bfe659d2c9a24adf87c2b20cbfba838c [2021-11-07 02:04:53,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:04:53,070 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:04:53,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:04:53,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:04:53,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:04:53,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:53" (1/1) ... [2021-11-07 02:04:53,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ed7b736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:53, skipping insertion in model container [2021-11-07 02:04:53,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:53" (1/1) ... [2021-11-07 02:04:53,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:04:53,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:04:54,678 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_29075afd-9ad8-41ce-98e4-f1d6af186c23/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i[216887,216900] [2021-11-07 02:04:54,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:04:54,728 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 02:04:54,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1c9e6db5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:54, skipping insertion in model container [2021-11-07 02:04:54,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:04:54,731 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:04:54,733 INFO L168 Benchmark]: Toolchain (without parser) took 1661.94 ms. Allocated memory was 98.6 MB in the beginning and 136.3 MB in the end (delta: 37.7 MB). Free memory was 55.0 MB in the beginning and 91.9 MB in the end (delta: -36.9 MB). Peak memory consumption was 34.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:04:54,734 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 98.6 MB. Free memory is still 53.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:04:54,735 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1657.10 ms. Allocated memory was 98.6 MB in the beginning and 136.3 MB in the end (delta: 37.7 MB). Free memory was 54.8 MB in the beginning and 91.9 MB in the end (delta: -37.1 MB). Peak memory consumption was 34.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:04:54,737 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 98.6 MB. Free memory is still 53.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1657.10 ms. Allocated memory was 98.6 MB in the beginning and 136.3 MB in the end (delta: 37.7 MB). Free memory was 54.8 MB in the beginning and 91.9 MB in the end (delta: -37.1 MB). Peak memory consumption was 34.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5741]: 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_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/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_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/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 64bit --witnessprinter.graph.data.programhash b83c28af83745ba79af1b1ebec4b495db7aa2efb3702685bbdc4b86421ef4c0a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:04:57,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:04:57,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:04:57,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:04:57,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:04:57,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:04:57,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:04:57,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:04:57,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:04:57,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:04:57,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:04:57,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:04:57,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:04:57,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:04:57,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:04:57,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:04:57,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:04:57,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:04:57,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:04:57,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:04:57,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:04:57,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:04:57,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:04:57,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:04:57,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:04:57,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:04:57,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:04:57,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:04:57,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:04:57,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:04:57,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:04:57,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:04:57,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:04:57,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:04:57,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:04:57,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:04:57,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:04:57,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:04:57,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:04:57,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:04:57,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:04:57,196 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 02:04:57,246 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:04:57,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:04:57,247 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:04:57,248 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:04:57,248 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:04:57,248 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:04:57,248 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:04:57,249 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:04:57,249 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:04:57,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:04:57,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:04:57,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:04:57,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:04:57,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:04:57,252 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:04:57,252 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:04:57,253 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:04:57,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:04:57,253 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:04:57,253 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:04:57,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:04:57,254 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:04:57,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:04:57,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:04:57,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:04:57,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:04:57,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:04:57,255 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:04:57,255 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:04:57,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:04:57,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:04:57,256 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:04:57,256 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_29075afd-9ad8-41ce-98e4-f1d6af186c23/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b83c28af83745ba79af1b1ebec4b495db7aa2efb3702685bbdc4b86421ef4c0a [2021-11-07 02:04:57,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:04:57,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:04:57,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:04:57,694 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:04:57,694 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:04:57,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 02:04:57,770 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/data/c383a583b/799c707569c2422caff6213e3bf06495/FLAG09424630c [2021-11-07 02:04:58,691 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:04:58,692 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 02:04:58,744 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/data/c383a583b/799c707569c2422caff6213e3bf06495/FLAG09424630c [2021-11-07 02:04:59,148 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/data/c383a583b/799c707569c2422caff6213e3bf06495 [2021-11-07 02:04:59,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:04:59,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:04:59,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:04:59,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:04:59,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:04:59,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:59" (1/1) ... [2021-11-07 02:04:59,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@611db56d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:59, skipping insertion in model container [2021-11-07 02:04:59,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:59" (1/1) ... [2021-11-07 02:04:59,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:04:59,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:05:01,100 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_29075afd-9ad8-41ce-98e4-f1d6af186c23/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i[216887,216900] [2021-11-07 02:05:01,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:05:01,172 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:05:01,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:05:01,586 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_29075afd-9ad8-41ce-98e4-f1d6af186c23/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i[216887,216900] [2021-11-07 02:05:01,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:05:01,622 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:05:01,919 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_29075afd-9ad8-41ce-98e4-f1d6af186c23/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i[216887,216900] [2021-11-07 02:05:01,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:05:02,064 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:05:02,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:02 WrapperNode [2021-11-07 02:05:02,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:05:02,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:05:02,067 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:05:02,067 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:05:02,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:02" (1/1) ... [2021-11-07 02:05:02,151 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:02" (1/1) ... [2021-11-07 02:05:02,458 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:05:02,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:05:02,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:05:02,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:05:02,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:02" (1/1) ... [2021-11-07 02:05:02,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:02" (1/1) ... [2021-11-07 02:05:02,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:02" (1/1) ... [2021-11-07 02:05:02,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:02" (1/1) ... [2021-11-07 02:05:02,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:02" (1/1) ... [2021-11-07 02:05:03,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:02" (1/1) ... [2021-11-07 02:05:03,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:02" (1/1) ... [2021-11-07 02:05:03,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:05:03,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:05:03,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:05:03,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:05:03,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:02" (1/1) ... [2021-11-07 02:05:03,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:05:03,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:05:03,173 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:05:03,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:05:03,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:05:03,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 02:05:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-07 02:05:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:05:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 02:05:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 02:05:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:05:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:05:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 02:05:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 02:05:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 02:05:03,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:05:03,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:05:03,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:05:03,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:05:03,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 02:05:03,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 02:05:03,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 02:05:03,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 02:05:03,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 02:05:03,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:05:03,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:05:03,233 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-07 02:05:03,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 02:05:03,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 02:05:03,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 02:05:03,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 02:05:03,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:05:03,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:05:51,878 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:05:51,878 INFO L299 CfgBuilder]: Removed 1734 assume(true) statements. [2021-11-07 02:05:51,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:05:51 BoogieIcfgContainer [2021-11-07 02:05:51,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:05:51,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:05:51,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:05:51,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:05:51,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:04:59" (1/3) ... [2021-11-07 02:05:51,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c5e545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:05:51, skipping insertion in model container [2021-11-07 02:05:51,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:02" (2/3) ... [2021-11-07 02:05:51,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c5e545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:05:51, skipping insertion in model container [2021-11-07 02:05:51,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:05:51" (3/3) ... [2021-11-07 02:05:51,892 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 02:05:51,898 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:05:51,898 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:05:51,975 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:05:51,986 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 02:05:51,986 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:05:52,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 1834 states, 1832 states have (on average 1.4939956331877728) internal successors, (2737), 1833 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:52,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:05:52,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:52,073 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:52,074 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:52,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:52,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1253874950, now seen corresponding path program 1 times [2021-11-07 02:05:52,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:52,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646899776] [2021-11-07 02:05:52,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:52,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:52,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:52,103 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:52,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:05:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:52,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:05:53,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:53,374 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 02:05:53,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:53,644 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:53,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646899776] [2021-11-07 02:05:53,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646899776] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:53,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:53,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:05:53,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352507580] [2021-11-07 02:05:53,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:05:53,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:53,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:05:53,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:05:53,673 INFO L87 Difference]: Start difference. First operand has 1834 states, 1832 states have (on average 1.4939956331877728) internal successors, (2737), 1833 states have internal predecessors, (2737), 0 states have call successors, (0), 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 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:53,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:53,784 INFO L93 Difference]: Finished difference Result 3664 states and 5469 transitions. [2021-11-07 02:05:53,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:05:53,786 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 02:05:53,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:53,818 INFO L225 Difference]: With dead ends: 3664 [2021-11-07 02:05:53,819 INFO L226 Difference]: Without dead ends: 1799 [2021-11-07 02:05:53,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 128 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 02:05:53,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-11-07 02:05:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1799. [2021-11-07 02:05:53,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1798 states have (on average 1.4799777530589544) internal successors, (2661), 1798 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:53,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 2661 transitions. [2021-11-07 02:05:53,975 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 2661 transitions. Word has length 65 [2021-11-07 02:05:53,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:53,976 INFO L470 AbstractCegarLoop]: Abstraction has 1799 states and 2661 transitions. [2021-11-07 02:05:53,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:53,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 2661 transitions. [2021-11-07 02:05:53,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:05:53,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:53,989 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:54,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:54,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:54,208 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:54,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:54,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1631549198, now seen corresponding path program 1 times [2021-11-07 02:05:54,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:54,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058181014] [2021-11-07 02:05:54,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:54,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:54,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:54,214 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:54,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:05:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:55,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:05:55,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:55,302 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 02:05:55,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:55,563 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 02:05:55,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:55,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058181014] [2021-11-07 02:05:55,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058181014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:55,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:55,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:05:55,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050658681] [2021-11-07 02:05:55,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:05:55,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:55,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:05:55,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:55,568 INFO L87 Difference]: Start difference. First operand 1799 states and 2661 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 02:05:56,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:56,006 INFO L93 Difference]: Finished difference Result 3578 states and 5311 transitions. [2021-11-07 02:05:56,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:05:56,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 65 [2021-11-07 02:05:56,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:56,019 INFO L225 Difference]: With dead ends: 3578 [2021-11-07 02:05:56,019 INFO L226 Difference]: Without dead ends: 1811 [2021-11-07 02:05:56,022 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 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 02:05:56,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2021-11-07 02:05:56,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1811. [2021-11-07 02:05:56,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 1.4767955801104973) internal successors, (2673), 1810 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2673 transitions. [2021-11-07 02:05:56,078 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2673 transitions. Word has length 65 [2021-11-07 02:05:56,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:56,079 INFO L470 AbstractCegarLoop]: Abstraction has 1811 states and 2673 transitions. [2021-11-07 02:05:56,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 02:05:56,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2673 transitions. [2021-11-07 02:05:56,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:05:56,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:56,082 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:56,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 02:05:56,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:56,302 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:56,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:56,303 INFO L85 PathProgramCache]: Analyzing trace with hash 227788082, now seen corresponding path program 1 times [2021-11-07 02:05:56,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:56,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988316930] [2021-11-07 02:05:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:56,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:56,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:56,306 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:56,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:05:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:57,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:05:57,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 02:05:57,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 02:05:58,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:58,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988316930] [2021-11-07 02:05:58,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988316930] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:58,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1499914686] [2021-11-07 02:05:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:58,119 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:58,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:05:58,124 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:05:58,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 02:05:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:59,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:59,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:05:59,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:05:59,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1499914686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:59,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:05:59,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:05:59,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167911413] [2021-11-07 02:05:59,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:59,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:59,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:59,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:05:59,537 INFO L87 Difference]: Start difference. First operand 1811 states and 2673 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 02:05:59,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:59,920 INFO L93 Difference]: Finished difference Result 4414 states and 6518 transitions. [2021-11-07 02:05:59,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:59,921 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 77 [2021-11-07 02:05:59,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:59,939 INFO L225 Difference]: With dead ends: 4414 [2021-11-07 02:05:59,940 INFO L226 Difference]: Without dead ends: 2667 [2021-11-07 02:05:59,944 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:05:59,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2021-11-07 02:06:00,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2667. [2021-11-07 02:06:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2667 states, 2666 states have (on average 1.4692423105776444) internal successors, (3917), 2666 states have internal predecessors, (3917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2667 states to 2667 states and 3917 transitions. [2021-11-07 02:06:00,047 INFO L78 Accepts]: Start accepts. Automaton has 2667 states and 3917 transitions. Word has length 77 [2021-11-07 02:06:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:00,052 INFO L470 AbstractCegarLoop]: Abstraction has 2667 states and 3917 transitions. [2021-11-07 02:06:00,055 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 02:06:00,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2667 states and 3917 transitions. [2021-11-07 02:06:00,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 02:06:00,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:00,061 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:00,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-07 02:06:00,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 02:06:00,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:00,475 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:00,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:00,476 INFO L85 PathProgramCache]: Analyzing trace with hash -865743698, now seen corresponding path program 1 times [2021-11-07 02:06:00,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:00,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113373844] [2021-11-07 02:06:00,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:00,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:00,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:00,480 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:00,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:06:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:01,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:06:01,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:06:01,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:06:02,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:02,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113373844] [2021-11-07 02:06:02,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113373844] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:02,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [315990879] [2021-11-07 02:06:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:02,353 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:02,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:06:02,360 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:06:02,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-07 02:06:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:03,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:06:03,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:06:03,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:06:03,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [315990879] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:03,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:06:03,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 02:06:03,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443106058] [2021-11-07 02:06:03,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:06:03,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:03,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:06:03,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:06:03,901 INFO L87 Difference]: Start difference. First operand 2667 states and 3917 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:08,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:08,355 INFO L93 Difference]: Finished difference Result 7866 states and 11596 transitions. [2021-11-07 02:06:08,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:06:08,356 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 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 105 [2021-11-07 02:06:08,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:08,388 INFO L225 Difference]: With dead ends: 7866 [2021-11-07 02:06:08,389 INFO L226 Difference]: Without dead ends: 5257 [2021-11-07 02:06:08,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:06:08,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5257 states. [2021-11-07 02:06:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5257 to 2667. [2021-11-07 02:06:08,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2667 states, 2666 states have (on average 1.4684921230307577) internal successors, (3915), 2666 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2667 states to 2667 states and 3915 transitions. [2021-11-07 02:06:08,522 INFO L78 Accepts]: Start accepts. Automaton has 2667 states and 3915 transitions. Word has length 105 [2021-11-07 02:06:08,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:08,524 INFO L470 AbstractCegarLoop]: Abstraction has 2667 states and 3915 transitions. [2021-11-07 02:06:08,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:08,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2667 states and 3915 transitions. [2021-11-07 02:06:08,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 02:06:08,534 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:08,534 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:08,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:08,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:08,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:08,944 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:08,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1187987989, now seen corresponding path program 1 times [2021-11-07 02:06:08,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:08,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237740605] [2021-11-07 02:06:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:08,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:08,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:08,947 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:08,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:06:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:09,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:06:09,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:06:10,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:06:10,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:10,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237740605] [2021-11-07 02:06:10,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237740605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:10,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2064129236] [2021-11-07 02:06:10,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:10,759 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:10,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:06:10,759 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:06:10,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 02:06:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:11,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:06:11,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:06:12,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:06:12,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2064129236] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:12,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:06:12,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 02:06:12,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851506986] [2021-11-07 02:06:12,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:06:12,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:12,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:06:12,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:06:12,433 INFO L87 Difference]: Start difference. First operand 2667 states and 3915 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:14,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:14,888 INFO L93 Difference]: Finished difference Result 7870 states and 11594 transitions. [2021-11-07 02:06:14,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:06:14,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 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 108 [2021-11-07 02:06:14,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:14,921 INFO L225 Difference]: With dead ends: 7870 [2021-11-07 02:06:14,921 INFO L226 Difference]: Without dead ends: 5257 [2021-11-07 02:06:14,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:06:14,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5257 states. [2021-11-07 02:06:15,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5257 to 2667. [2021-11-07 02:06:15,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2667 states, 2666 states have (on average 1.467741935483871) internal successors, (3913), 2666 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2667 states to 2667 states and 3913 transitions. [2021-11-07 02:06:15,055 INFO L78 Accepts]: Start accepts. Automaton has 2667 states and 3913 transitions. Word has length 108 [2021-11-07 02:06:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:15,055 INFO L470 AbstractCegarLoop]: Abstraction has 2667 states and 3913 transitions. [2021-11-07 02:06:15,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:15,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2667 states and 3913 transitions. [2021-11-07 02:06:15,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 02:06:15,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:15,060 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:15,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:15,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:15,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:15,469 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:15,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:15,469 INFO L85 PathProgramCache]: Analyzing trace with hash -135588178, now seen corresponding path program 1 times [2021-11-07 02:06:15,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:15,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056013220] [2021-11-07 02:06:15,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:15,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:15,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:15,471 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:15,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:06:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:16,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:06:16,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:06:16,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:06:17,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:17,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056013220] [2021-11-07 02:06:17,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056013220] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:17,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1277962419] [2021-11-07 02:06:17,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:17,439 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:17,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:06:17,440 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:06:17,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 02:06:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:18,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 02:06:18,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:06:19,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:06:19,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1277962419] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:19,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:06:19,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [5, 5] total 19 [2021-11-07 02:06:19,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959546416] [2021-11-07 02:06:19,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 02:06:19,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:19,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 02:06:19,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-11-07 02:06:19,958 INFO L87 Difference]: Start difference. First operand 2667 states and 3913 transitions. Second operand has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:29,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:29,142 INFO L93 Difference]: Finished difference Result 24425 states and 36073 transitions. [2021-11-07 02:06:29,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 02:06:29,143 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 0 states have call successors, (0), 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 108 [2021-11-07 02:06:29,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:29,229 INFO L225 Difference]: With dead ends: 24425 [2021-11-07 02:06:29,230 INFO L226 Difference]: Without dead ends: 21800 [2021-11-07 02:06:29,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 02:06:29,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21800 states. [2021-11-07 02:06:29,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21800 to 4365. [2021-11-07 02:06:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4365 states, 4364 states have (on average 1.4777726856095326) internal successors, (6449), 4364 states have internal predecessors, (6449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4365 states to 4365 states and 6449 transitions. [2021-11-07 02:06:29,780 INFO L78 Accepts]: Start accepts. Automaton has 4365 states and 6449 transitions. Word has length 108 [2021-11-07 02:06:29,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:29,782 INFO L470 AbstractCegarLoop]: Abstraction has 4365 states and 6449 transitions. [2021-11-07 02:06:29,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 4365 states and 6449 transitions. [2021-11-07 02:06:29,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 02:06:29,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:29,787 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:29,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:30,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:30,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:30,200 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:30,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:30,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1046937034, now seen corresponding path program 1 times [2021-11-07 02:06:30,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:30,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826575651] [2021-11-07 02:06:30,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:30,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:30,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:30,203 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:30,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:06:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:31,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:06:31,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:06:31,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:06:32,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:32,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826575651] [2021-11-07 02:06:32,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826575651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:32,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2096928934] [2021-11-07 02:06:32,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:32,125 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:32,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:06:32,129 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:06:32,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 02:06:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:34,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:06:34,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:06:34,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:06:34,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2096928934] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:34,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079740450] [2021-11-07 02:06:34,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:34,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:06:34,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:06:34,729 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:06:34,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 02:06:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:35,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:06:35,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:06:36,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:06:36,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079740450] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:36,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:06:36,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-07 02:06:36,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056244276] [2021-11-07 02:06:36,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:06:36,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:36,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:06:36,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:06:36,344 INFO L87 Difference]: Start difference. First operand 4365 states and 6449 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:37,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:37,660 INFO L93 Difference]: Finished difference Result 15380 states and 22760 transitions. [2021-11-07 02:06:37,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:06:37,664 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 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 110 [2021-11-07 02:06:37,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:37,702 INFO L225 Difference]: With dead ends: 15380 [2021-11-07 02:06:37,702 INFO L226 Difference]: Without dead ends: 15378 [2021-11-07 02:06:37,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 646 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:06:37,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15378 states. [2021-11-07 02:06:38,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15378 to 4369. [2021-11-07 02:06:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4369 states, 4368 states have (on average 1.477335164835165) internal successors, (6453), 4368 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 6453 transitions. [2021-11-07 02:06:38,244 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 6453 transitions. Word has length 110 [2021-11-07 02:06:38,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:38,245 INFO L470 AbstractCegarLoop]: Abstraction has 4369 states and 6453 transitions. [2021-11-07 02:06:38,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:38,245 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 6453 transitions. [2021-11-07 02:06:38,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 02:06:38,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:38,250 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:38,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:38,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-07 02:06:38,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:38,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:38,865 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:38,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:38,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1253666161, now seen corresponding path program 1 times [2021-11-07 02:06:38,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:38,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173301405] [2021-11-07 02:06:38,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:38,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:38,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:38,867 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:38,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:06:39,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:40,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:06:40,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:06:40,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:06:41,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:41,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173301405] [2021-11-07 02:06:41,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173301405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:41,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [140174315] [2021-11-07 02:06:41,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:41,053 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:41,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:06:41,054 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:06:41,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-07 02:06:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:43,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:06:43,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:06:43,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:06:43,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [140174315] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:43,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930124602] [2021-11-07 02:06:43,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:43,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:06:43,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:06:43,846 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:06:43,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 02:06:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:45,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:06:45,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:06:45,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:06:45,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930124602] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:45,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:06:45,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 14 [2021-11-07 02:06:45,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979066804] [2021-11-07 02:06:45,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:06:45,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:45,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:06:45,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:06:45,698 INFO L87 Difference]: Start difference. First operand 4369 states and 6453 transitions. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:47,971 INFO L93 Difference]: Finished difference Result 23351 states and 34578 transitions. [2021-11-07 02:06:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 02:06:47,972 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 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 117 [2021-11-07 02:06:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:48,038 INFO L225 Difference]: With dead ends: 23351 [2021-11-07 02:06:48,038 INFO L226 Difference]: Without dead ends: 23349 [2021-11-07 02:06:48,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 688 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-11-07 02:06:48,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23349 states. [2021-11-07 02:06:48,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23349 to 4371. [2021-11-07 02:06:48,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 4370 states have (on average 1.477116704805492) internal successors, (6455), 4370 states have internal predecessors, (6455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:48,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 6455 transitions. [2021-11-07 02:06:48,844 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 6455 transitions. Word has length 117 [2021-11-07 02:06:48,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:48,844 INFO L470 AbstractCegarLoop]: Abstraction has 4371 states and 6455 transitions. [2021-11-07 02:06:48,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:48,845 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 6455 transitions. [2021-11-07 02:06:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 02:06:48,852 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:48,852 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:48,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:49,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-07 02:06:49,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:49,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:49,481 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:49,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:49,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1631396725, now seen corresponding path program 1 times [2021-11-07 02:06:49,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:49,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759004413] [2021-11-07 02:06:49,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:49,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:49,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:49,483 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:49,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:06:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:50,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:06:50,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:06:51,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:06:51,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:51,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759004413] [2021-11-07 02:06:51,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759004413] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:51,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [633849346] [2021-11-07 02:06:51,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:51,941 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:51,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:06:51,957 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:06:51,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 02:06:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:53,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:06:53,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:06:53,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:06:54,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [633849346] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:54,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:06:54,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:06:54,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737191478] [2021-11-07 02:06:54,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:06:54,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:54,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:06:54,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:06:54,104 INFO L87 Difference]: Start difference. First operand 4371 states and 6455 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:54,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:54,737 INFO L93 Difference]: Finished difference Result 8720 states and 12879 transitions. [2021-11-07 02:06:54,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:06:54,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 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 131 [2021-11-07 02:06:54,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:54,747 INFO L225 Difference]: With dead ends: 8720 [2021-11-07 02:06:54,747 INFO L226 Difference]: Without dead ends: 4413 [2021-11-07 02:06:54,754 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:06:54,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4413 states. [2021-11-07 02:06:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4413 to 4371. [2021-11-07 02:06:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 4370 states have (on average 1.448283752860412) internal successors, (6329), 4370 states have internal predecessors, (6329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 6329 transitions. [2021-11-07 02:06:55,292 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 6329 transitions. Word has length 131 [2021-11-07 02:06:55,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:55,292 INFO L470 AbstractCegarLoop]: Abstraction has 4371 states and 6329 transitions. [2021-11-07 02:06:55,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:55,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 6329 transitions. [2021-11-07 02:06:55,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 02:06:55,298 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:55,298 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:55,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:55,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 02:06:55,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:55,699 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:55,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:55,699 INFO L85 PathProgramCache]: Analyzing trace with hash 782121231, now seen corresponding path program 1 times [2021-11-07 02:06:55,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:55,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319004277] [2021-11-07 02:06:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:55,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:55,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:55,702 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:55,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:06:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:57,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:06:57,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:06:57,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:06:58,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:58,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319004277] [2021-11-07 02:06:58,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319004277] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:58,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1780015666] [2021-11-07 02:06:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:58,234 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:58,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:06:58,234 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:06:58,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:07:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:00,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:07:00,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:07:00,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:07:00,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1780015666] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:00,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:07:00,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [5, 5] total 13 [2021-11-07 02:07:00,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849123104] [2021-11-07 02:07:00,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:07:00,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:00,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:07:00,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:07:00,861 INFO L87 Difference]: Start difference. First operand 4371 states and 6329 transitions. Second operand has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:03,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:03,542 INFO L93 Difference]: Finished difference Result 17399 states and 25214 transitions. [2021-11-07 02:07:03,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:07:03,543 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 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 134 [2021-11-07 02:07:03,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:03,567 INFO L225 Difference]: With dead ends: 17399 [2021-11-07 02:07:03,567 INFO L226 Difference]: Without dead ends: 13092 [2021-11-07 02:07:03,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:07:03,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13092 states. [2021-11-07 02:07:04,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13092 to 4240. [2021-11-07 02:07:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4240 states, 4239 states have (on average 1.4479830148619957) internal successors, (6138), 4239 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:04,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4240 states to 4240 states and 6138 transitions. [2021-11-07 02:07:04,317 INFO L78 Accepts]: Start accepts. Automaton has 4240 states and 6138 transitions. Word has length 134 [2021-11-07 02:07:04,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:04,318 INFO L470 AbstractCegarLoop]: Abstraction has 4240 states and 6138 transitions. [2021-11-07 02:07:04,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:04,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4240 states and 6138 transitions. [2021-11-07 02:07:04,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-07 02:07:04,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:04,327 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:07:04,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:04,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-07 02:07:04,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:04,741 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:04,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:04,741 INFO L85 PathProgramCache]: Analyzing trace with hash -972234874, now seen corresponding path program 1 times [2021-11-07 02:07:04,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:04,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556019691] [2021-11-07 02:07:04,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:04,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:04,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:04,743 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:04,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:07:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:06,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:07:06,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:07:07,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:07:07,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:07,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556019691] [2021-11-07 02:07:07,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556019691] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:07:07,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [850638552] [2021-11-07 02:07:07,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:07,609 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:07,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:07:07,610 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:07:07,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 02:07:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:09,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:09,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:07:09,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:07:10,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [850638552] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:10,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:07:10,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:07:10,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984099318] [2021-11-07 02:07:10,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:10,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:10,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:10,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:07:10,206 INFO L87 Difference]: Start difference. First operand 4240 states and 6138 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:13,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:13,528 INFO L93 Difference]: Finished difference Result 10865 states and 15739 transitions. [2021-11-07 02:07:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:13,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 144 [2021-11-07 02:07:13,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:13,542 INFO L225 Difference]: With dead ends: 10865 [2021-11-07 02:07:13,542 INFO L226 Difference]: Without dead ends: 6689 [2021-11-07 02:07:13,549 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 564 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:07:13,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6689 states. [2021-11-07 02:07:14,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6689 to 4241. [2021-11-07 02:07:14,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4241 states, 4240 states have (on average 1.447877358490566) internal successors, (6139), 4240 states have internal predecessors, (6139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4241 states to 4241 states and 6139 transitions. [2021-11-07 02:07:14,023 INFO L78 Accepts]: Start accepts. Automaton has 4241 states and 6139 transitions. Word has length 144 [2021-11-07 02:07:14,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:14,023 INFO L470 AbstractCegarLoop]: Abstraction has 4241 states and 6139 transitions. [2021-11-07 02:07:14,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 4241 states and 6139 transitions. [2021-11-07 02:07:14,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 02:07:14,033 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:14,033 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:07:14,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:14,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:14,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:14,468 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:14,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:14,469 INFO L85 PathProgramCache]: Analyzing trace with hash 842225543, now seen corresponding path program 1 times [2021-11-07 02:07:14,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:14,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871146541] [2021-11-07 02:07:14,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:14,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:14,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:14,471 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:14,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:07:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:16,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:07:16,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:16,844 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:07:16,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:07:17,628 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:17,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871146541] [2021-11-07 02:07:17,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871146541] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:07:17,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1857598614] [2021-11-07 02:07:17,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:17,629 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:17,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:07:17,630 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:07:17,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 02:07:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:19,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:19,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:07:20,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:07:20,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1857598614] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:20,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:07:20,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:07:20,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724313489] [2021-11-07 02:07:20,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:20,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:20,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:20,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:07:20,359 INFO L87 Difference]: Start difference. First operand 4241 states and 6139 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:21,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:21,563 INFO L93 Difference]: Finished difference Result 10865 states and 15738 transitions. [2021-11-07 02:07:21,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:21,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 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 146 [2021-11-07 02:07:21,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:21,587 INFO L225 Difference]: With dead ends: 10865 [2021-11-07 02:07:21,587 INFO L226 Difference]: Without dead ends: 6688 [2021-11-07 02:07:21,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:07:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6688 states. [2021-11-07 02:07:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6688 to 4237. [2021-11-07 02:07:22,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4237 states, 4236 states have (on average 1.4475920679886685) internal successors, (6132), 4236 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:22,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4237 states to 4237 states and 6132 transitions. [2021-11-07 02:07:22,364 INFO L78 Accepts]: Start accepts. Automaton has 4237 states and 6132 transitions. Word has length 146 [2021-11-07 02:07:22,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:22,364 INFO L470 AbstractCegarLoop]: Abstraction has 4237 states and 6132 transitions. [2021-11-07 02:07:22,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 4237 states and 6132 transitions. [2021-11-07 02:07:22,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-07 02:07:22,374 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:22,375 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:07:22,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:22,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:22,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:22,787 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:22,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:22,787 INFO L85 PathProgramCache]: Analyzing trace with hash 975460430, now seen corresponding path program 1 times [2021-11-07 02:07:22,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:22,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469467048] [2021-11-07 02:07:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:22,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:22,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:22,789 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:22,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 02:07:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:24,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:07:24,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:07:25,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:07:25,806 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:25,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469467048] [2021-11-07 02:07:25,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469467048] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:07:25,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1007084920] [2021-11-07 02:07:25,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:25,806 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:25,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:07:25,807 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:07:25,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 02:07:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:28,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 02:07:28,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:28,790 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:07:28,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:07:29,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1007084920] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:29,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:07:29,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [5, 5] total 15 [2021-11-07 02:07:29,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092702637] [2021-11-07 02:07:29,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 02:07:29,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:29,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 02:07:29,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:07:29,239 INFO L87 Difference]: Start difference. First operand 4237 states and 6132 transitions. Second operand has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:37,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:37,963 INFO L93 Difference]: Finished difference Result 39713 states and 57607 transitions. [2021-11-07 02:07:37,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 02:07:37,964 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 0 states have call successors, (0), 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 150 [2021-11-07 02:07:37,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:38,007 INFO L225 Difference]: With dead ends: 39713 [2021-11-07 02:07:38,007 INFO L226 Difference]: Without dead ends: 35540 [2021-11-07 02:07:38,015 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 594 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-11-07 02:07:38,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35540 states. [2021-11-07 02:07:39,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35540 to 4240. [2021-11-07 02:07:39,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4240 states, 4239 states have (on average 1.4472753007784855) internal successors, (6135), 4239 states have internal predecessors, (6135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:39,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4240 states to 4240 states and 6135 transitions. [2021-11-07 02:07:39,049 INFO L78 Accepts]: Start accepts. Automaton has 4240 states and 6135 transitions. Word has length 150 [2021-11-07 02:07:39,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:39,049 INFO L470 AbstractCegarLoop]: Abstraction has 4240 states and 6135 transitions. [2021-11-07 02:07:39,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:39,050 INFO L276 IsEmpty]: Start isEmpty. Operand 4240 states and 6135 transitions. [2021-11-07 02:07:39,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-07 02:07:39,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:39,060 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:07:39,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-07 02:07:39,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:39,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:39,477 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:39,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:39,477 INFO L85 PathProgramCache]: Analyzing trace with hash 354309490, now seen corresponding path program 1 times [2021-11-07 02:07:39,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:39,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588014640] [2021-11-07 02:07:39,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:39,479 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:39,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:39,479 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:39,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 02:07:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:41,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:07:41,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:07:42,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:07:42,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:42,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588014640] [2021-11-07 02:07:42,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588014640] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:07:42,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [609268345] [2021-11-07 02:07:42,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:42,680 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:42,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:07:42,680 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:07:42,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 02:07:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:45,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:07:45,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:07:46,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:07:46,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [609268345] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:07:46,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254073664] [2021-11-07 02:07:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:46,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:07:46,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:07:46,781 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:07:46,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 02:07:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:49,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:49,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:07:49,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:07:50,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254073664] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:50,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:07:50,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-07 02:07:50,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834922001] [2021-11-07 02:07:50,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:50,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:50,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:50,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:07:50,370 INFO L87 Difference]: Start difference. First operand 4240 states and 6135 transitions. Second operand has 4 states, 4 states have (on average 52.75) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:51,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:51,033 INFO L93 Difference]: Finished difference Result 8416 states and 12197 transitions. [2021-11-07 02:07:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:51,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 152 [2021-11-07 02:07:51,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:51,038 INFO L225 Difference]: With dead ends: 8416 [2021-11-07 02:07:51,038 INFO L226 Difference]: Without dead ends: 4240 [2021-11-07 02:07:51,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 898 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:07:51,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2021-11-07 02:07:51,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 4240. [2021-11-07 02:07:51,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4240 states, 4239 states have (on average 1.4468034913894787) internal successors, (6133), 4239 states have internal predecessors, (6133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4240 states to 4240 states and 6133 transitions. [2021-11-07 02:07:51,712 INFO L78 Accepts]: Start accepts. Automaton has 4240 states and 6133 transitions. Word has length 152 [2021-11-07 02:07:51,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:51,712 INFO L470 AbstractCegarLoop]: Abstraction has 4240 states and 6133 transitions. [2021-11-07 02:07:51,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:51,712 INFO L276 IsEmpty]: Start isEmpty. Operand 4240 states and 6133 transitions. [2021-11-07 02:07:51,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-07 02:07:51,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:51,725 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:07:51,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:51,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:52,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:52,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:07:52,341 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:52,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:52,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1524821456, now seen corresponding path program 1 times [2021-11-07 02:07:52,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:52,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482813614] [2021-11-07 02:07:52,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:52,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:52,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:52,343 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:52,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 02:07:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:54,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:07:54,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:07:55,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:07:55,760 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:55,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482813614] [2021-11-07 02:07:55,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482813614] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:07:55,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [928407029] [2021-11-07 02:07:55,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:55,761 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:55,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:07:55,776 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:07:55,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 02:07:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:59,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:07:59,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:07:59,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:08:00,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [928407029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:00,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93052571] [2021-11-07 02:08:00,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:00,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:00,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:00,100 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:00,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 02:08:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:02,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:08:02,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:08:03,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:08:03,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93052571] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:03,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:08:03,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-07 02:08:03,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259336709] [2021-11-07 02:08:03,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:08:03,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:03,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:08:03,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:08:03,808 INFO L87 Difference]: Start difference. First operand 4240 states and 6133 transitions. Second operand has 6 states, 6 states have (on average 41.5) internal successors, (249), 6 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:08,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:08,100 INFO L93 Difference]: Finished difference Result 16752 states and 24289 transitions. [2021-11-07 02:08:08,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:08:08,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 41.5) internal successors, (249), 6 states have internal predecessors, (249), 0 states have call successors, (0), 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 152 [2021-11-07 02:08:08,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:08,118 INFO L225 Difference]: With dead ends: 16752 [2021-11-07 02:08:08,118 INFO L226 Difference]: Without dead ends: 12576 [2021-11-07 02:08:08,125 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 897 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:08:08,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12576 states. [2021-11-07 02:08:08,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12576 to 4260. [2021-11-07 02:08:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4260 states, 4259 states have (on average 1.4465837050950927) internal successors, (6161), 4259 states have internal predecessors, (6161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4260 states to 4260 states and 6161 transitions. [2021-11-07 02:08:08,747 INFO L78 Accepts]: Start accepts. Automaton has 4260 states and 6161 transitions. Word has length 152 [2021-11-07 02:08:08,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:08,747 INFO L470 AbstractCegarLoop]: Abstraction has 4260 states and 6161 transitions. [2021-11-07 02:08:08,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.5) internal successors, (249), 6 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:08,747 INFO L276 IsEmpty]: Start isEmpty. Operand 4260 states and 6161 transitions. [2021-11-07 02:08:08,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-07 02:08:08,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:08,754 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:08:08,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:09,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-07 02:08:09,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-07 02:08:09,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:09,381 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:09,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:09,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1815951985, now seen corresponding path program 1 times [2021-11-07 02:08:09,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:09,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239239221] [2021-11-07 02:08:09,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:09,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:09,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:09,383 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:09,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 02:08:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:11,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:08:11,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:08:12,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:08:13,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:13,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239239221] [2021-11-07 02:08:13,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239239221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:13,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2128820104] [2021-11-07 02:08:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:13,153 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:13,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:13,154 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:13,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-07 02:08:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:16,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:08:16,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:08:17,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 02:08:17,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2128820104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:17,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841140311] [2021-11-07 02:08:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:17,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:17,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:17,827 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:17,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 02:08:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:20,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:08:20,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 02:08:21,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 02:08:21,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841140311] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:21,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:08:21,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 10 [2021-11-07 02:08:21,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041605311] [2021-11-07 02:08:21,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:08:21,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:21,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:08:21,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:08:21,465 INFO L87 Difference]: Start difference. First operand 4260 states and 6161 transitions. Second operand has 10 states, 10 states have (on average 16.5) internal successors, (165), 10 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:23,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:23,142 INFO L93 Difference]: Finished difference Result 8504 states and 12321 transitions. [2021-11-07 02:08:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:08:23,143 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.5) internal successors, (165), 10 states have internal predecessors, (165), 0 states have call successors, (0), 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 154 [2021-11-07 02:08:23,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:23,148 INFO L225 Difference]: With dead ends: 8504 [2021-11-07 02:08:23,148 INFO L226 Difference]: Without dead ends: 4278 [2021-11-07 02:08:23,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 920 GetRequests, 910 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:08:23,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-11-07 02:08:23,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 4278. [2021-11-07 02:08:23,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4278 states, 4277 states have (on average 1.4447042319382746) internal successors, (6179), 4277 states have internal predecessors, (6179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:23,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4278 states to 4278 states and 6179 transitions. [2021-11-07 02:08:23,822 INFO L78 Accepts]: Start accepts. Automaton has 4278 states and 6179 transitions. Word has length 154 [2021-11-07 02:08:23,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:23,823 INFO L470 AbstractCegarLoop]: Abstraction has 4278 states and 6179 transitions. [2021-11-07 02:08:23,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.5) internal successors, (165), 10 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:23,823 INFO L276 IsEmpty]: Start isEmpty. Operand 4278 states and 6179 transitions. [2021-11-07 02:08:23,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-07 02:08:23,829 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:23,829 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:08:23,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:24,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-07 02:08:24,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2021-11-07 02:08:24,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:24,443 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:24,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:24,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1427169553, now seen corresponding path program 2 times [2021-11-07 02:08:24,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:24,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889807633] [2021-11-07 02:08:24,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:08:24,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:24,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:24,446 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:24,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 02:09:00,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:09:00,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:09:00,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:09:00,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-07 02:09:01,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-07 02:09:02,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:02,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889807633] [2021-11-07 02:09:02,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889807633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:02,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1635287464] [2021-11-07 02:09:02,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:09:02,654 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:02,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:02,660 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:02,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29075afd-9ad8-41ce-98e4-f1d6af186c23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process