./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH --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 f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:32:15,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:32:15,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:32:15,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:32:15,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:32:15,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:32:15,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:32:15,305 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:32:15,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:32:15,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:32:15,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:32:15,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:32:15,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:32:15,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:32:15,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:32:15,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:32:15,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:32:15,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:32:15,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:32:15,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:32:15,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:32:15,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:32:15,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:32:15,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:32:15,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:32:15,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:32:15,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:32:15,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:32:15,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:32:15,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:32:15,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:32:15,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:32:15,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:32:15,359 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:32:15,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:32:15,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:32:15,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:32:15,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:32:15,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:32:15,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:32:15,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:32:15,364 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-03 04:32:15,406 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:32:15,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:32:15,408 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:32:15,408 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:32:15,408 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:32:15,408 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:32:15,408 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:32:15,409 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:32:15,409 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:32:15,409 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:32:15,416 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:32:15,416 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:32:15,416 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:32:15,416 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:32:15,417 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:32:15,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:32:15,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:32:15,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:32:15,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:32:15,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:32:15,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:32:15,418 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:32:15,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:32:15,419 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:32:15,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:32:15,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:32:15,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:32:15,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:32:15,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:32:15,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:32:15,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:32:15,422 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:32:15,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:32:15,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:32:15,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:32:15,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:32:15,422 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_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 [2021-11-03 04:32:15,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:32:15,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:32:15,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:32:15,724 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:32:15,733 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:32:15,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-03 04:32:15,820 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/data/f9aac6d78/669cc3ac9736404ba68ac3f4d71710a8/FLAG2eba1a2fa [2021-11-03 04:32:16,646 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:32:16,646 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-03 04:32:16,694 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/data/f9aac6d78/669cc3ac9736404ba68ac3f4d71710a8/FLAG2eba1a2fa [2021-11-03 04:32:17,161 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/data/f9aac6d78/669cc3ac9736404ba68ac3f4d71710a8 [2021-11-03 04:32:17,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:32:17,165 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:32:17,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:32:17,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:32:17,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:32:17,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:32:17" (1/1) ... [2021-11-03 04:32:17,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75cb55c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:17, skipping insertion in model container [2021-11-03 04:32:17,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:32:17" (1/1) ... [2021-11-03 04:32:17,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:32:17,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:32:18,602 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_3428ae0d-99d3-409a-b5d5-3a987d42e596/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-03 04:32:18,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:32:18,727 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) [2021-11-03 04:32:18,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@56b2c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:18, skipping insertion in model container [2021-11-03 04:32:18,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:32:18,728 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:32:18,731 INFO L168 Benchmark]: Toolchain (without parser) took 1563.92 ms. Allocated memory is still 144.7 MB. Free memory was 98.1 MB in the beginning and 105.0 MB in the end (delta: -6.9 MB). Peak memory consumption was 51.3 MB. Max. memory is 16.1 GB. [2021-11-03 04:32:18,731 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 144.7 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:32:18,733 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1561.29 ms. Allocated memory is still 144.7 MB. Free memory was 97.8 MB in the beginning and 105.0 MB in the end (delta: -7.2 MB). Peak memory consumption was 51.3 MB. Max. memory is 16.1 GB. [2021-11-03 04:32:18,735 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 144.7 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1561.29 ms. Allocated memory is still 144.7 MB. Free memory was 97.8 MB in the beginning and 105.0 MB in the end (delta: -7.2 MB). Peak memory consumption was 51.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5209]: 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_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH --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 f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:32:20,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:32:20,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:32:20,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:32:20,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:32:21,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:32:21,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:32:21,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:32:21,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:32:21,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:32:21,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:32:21,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:32:21,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:32:21,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:32:21,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:32:21,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:32:21,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:32:21,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:32:21,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:32:21,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:32:21,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:32:21,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:32:21,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:32:21,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:32:21,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:32:21,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:32:21,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:32:21,068 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:32:21,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:32:21,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:32:21,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:32:21,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:32:21,073 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:32:21,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:32:21,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:32:21,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:32:21,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:32:21,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:32:21,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:32:21,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:32:21,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:32:21,080 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-03 04:32:21,136 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:32:21,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:32:21,138 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:32:21,138 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:32:21,138 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:32:21,138 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:32:21,139 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:32:21,139 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:32:21,139 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:32:21,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:32:21,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:32:21,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:32:21,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:32:21,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:32:21,141 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:32:21,141 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:32:21,142 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:32:21,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:32:21,142 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:32:21,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:32:21,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:32:21,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:32:21,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:32:21,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:32:21,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:32:21,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:32:21,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:32:21,144 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:32:21,145 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:32:21,145 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:32:21,145 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:32:21,145 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:32:21,146 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_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 [2021-11-03 04:32:21,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:32:21,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:32:21,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:32:21,527 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:32:21,527 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:32:21,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-03 04:32:21,599 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/data/a187ab5b1/e3516e529f9147e8a766e9cdc6b31eeb/FLAG6a0268248 [2021-11-03 04:32:22,507 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:32:22,509 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-03 04:32:22,562 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/data/a187ab5b1/e3516e529f9147e8a766e9cdc6b31eeb/FLAG6a0268248 [2021-11-03 04:32:22,997 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/data/a187ab5b1/e3516e529f9147e8a766e9cdc6b31eeb [2021-11-03 04:32:23,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:32:23,001 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:32:23,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:32:23,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:32:23,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:32:23,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:32:22" (1/1) ... [2021-11-03 04:32:23,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bbc6a32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:23, skipping insertion in model container [2021-11-03 04:32:23,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:32:22" (1/1) ... [2021-11-03 04:32:23,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:32:23,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:32:24,686 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_3428ae0d-99d3-409a-b5d5-3a987d42e596/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-03 04:32:24,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:32:24,793 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:32:24,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:32:25,235 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_3428ae0d-99d3-409a-b5d5-3a987d42e596/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-03 04:32:25,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:32:25,297 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:32:25,622 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_3428ae0d-99d3-409a-b5d5-3a987d42e596/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-03 04:32:25,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:32:25,906 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:32:25,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:25 WrapperNode [2021-11-03 04:32:25,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:32:25,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:32:25,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:32:25,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:32:25,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:25" (1/1) ... [2021-11-03 04:32:26,010 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:25" (1/1) ... [2021-11-03 04:32:26,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:32:26,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:32:26,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:32:26,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:32:26,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:25" (1/1) ... [2021-11-03 04:32:26,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:25" (1/1) ... [2021-11-03 04:32:26,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:25" (1/1) ... [2021-11-03 04:32:26,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:25" (1/1) ... [2021-11-03 04:32:26,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:25" (1/1) ... [2021-11-03 04:32:26,470 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:25" (1/1) ... [2021-11-03 04:32:26,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:25" (1/1) ... [2021-11-03 04:32:26,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:32:26,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:32:26,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:32:26,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:32:26,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:25" (1/1) ... [2021-11-03 04:32:26,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:32:26,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:32:26,540 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:32:26,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:32:26,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 04:32:26,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-03 04:32:26,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:32:26,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-03 04:32:26,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-03 04:32:26,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-03 04:32:26,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:32:26,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:32:26,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-03 04:32:26,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-03 04:32:26,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-03 04:32:26,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:32:26,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:32:26,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 04:32:26,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:32:26,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-03 04:32:26,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-03 04:32:26,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-03 04:32:26,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-03 04:32:26,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-03 04:32:26,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-03 04:32:26,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:32:26,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:32:26,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-03 04:32:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-03 04:32:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-03 04:32:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-03 04:32:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:32:26,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:32:27,266 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 04:32:27,310 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 04:32:27,334 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 04:32:27,335 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 04:32:27,338 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 04:32:27,339 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 04:32:27,369 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 04:33:07,564 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##644: assume !false; [2021-11-03 04:33:07,565 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##643: assume false; [2021-11-03 04:33:07,565 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##320: assume false; [2021-11-03 04:33:07,566 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##321: assume !false; [2021-11-03 04:33:07,566 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##375: assume !false; [2021-11-03 04:33:07,566 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##374: assume false; [2021-11-03 04:33:07,566 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##381: assume !false; [2021-11-03 04:33:07,567 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##380: assume false; [2021-11-03 04:33:07,567 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##335: assume !false; [2021-11-03 04:33:07,567 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##334: assume false; [2021-11-03 04:33:07,567 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2021-11-03 04:33:07,568 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2021-11-03 04:33:07,568 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##164: assume !false;call ULTIMATE.dealloc(fst_ioctl_~#wrthdr~0.base, fst_ioctl_~#wrthdr~0.offset);havoc fst_ioctl_~#wrthdr~0.base, fst_ioctl_~#wrthdr~0.offset;call ULTIMATE.dealloc(fst_ioctl_~#info~0.base, fst_ioctl_~#info~0.offset);havoc fst_ioctl_~#info~0.base, fst_ioctl_~#info~0.offset; [2021-11-03 04:33:07,568 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume false; [2021-11-03 04:33:07,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:33:07,590 INFO L299 CfgBuilder]: Removed 929 assume(true) statements. [2021-11-03 04:33:07,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:33:07 BoogieIcfgContainer [2021-11-03 04:33:07,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:33:07,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:33:07,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:33:07,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:33:07,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:32:22" (1/3) ... [2021-11-03 04:33:07,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33789ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:33:07, skipping insertion in model container [2021-11-03 04:33:07,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:25" (2/3) ... [2021-11-03 04:33:07,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33789ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:33:07, skipping insertion in model container [2021-11-03 04:33:07,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:33:07" (3/3) ... [2021-11-03 04:33:07,601 INFO L111 eAbstractionObserver]: Analyzing ICFG module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-03 04:33:07,606 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:33:07,606 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-03 04:33:07,657 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:33:07,663 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 [2021-11-03 04:33:07,663 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-03 04:33:07,699 INFO L276 IsEmpty]: Start isEmpty. Operand has 828 states, 824 states have (on average 1.3361650485436893) internal successors, (1101), 827 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:07,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 04:33:07,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:07,705 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:33:07,706 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:07,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:07,711 INFO L85 PathProgramCache]: Analyzing trace with hash -113753420, now seen corresponding path program 1 times [2021-11-03 04:33:07,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:07,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115581248] [2021-11-03 04:33:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:07,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:07,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:07,733 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:07,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:33:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:08,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:33:08,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:08,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:09,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:09,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115581248] [2021-11-03 04:33:09,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115581248] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:09,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:33:09,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:33:09,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930120202] [2021-11-03 04:33:09,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:33:09,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:09,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:33:09,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:33:09,070 INFO L87 Difference]: Start difference. First operand has 828 states, 824 states have (on average 1.3361650485436893) internal successors, (1101), 827 states have internal predecessors, (1101), 0 states have call successors, (0), 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 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:09,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:09,302 INFO L93 Difference]: Finished difference Result 1654 states and 2201 transitions. [2021-11-03 04:33:09,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:33:09,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 12 [2021-11-03 04:33:09,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:09,344 INFO L225 Difference]: With dead ends: 1654 [2021-11-03 04:33:09,349 INFO L226 Difference]: Without dead ends: 827 [2021-11-03 04:33:09,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:33:09,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-11-03 04:33:09,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2021-11-03 04:33:09,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 824 states have (on average 1.3240291262135921) internal successors, (1091), 826 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:09,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1091 transitions. [2021-11-03 04:33:09,491 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1091 transitions. Word has length 12 [2021-11-03 04:33:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:09,493 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1091 transitions. [2021-11-03 04:33:09,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:09,497 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1091 transitions. [2021-11-03 04:33:09,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-03 04:33:09,498 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:09,498 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:33:09,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:09,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:33:09,720 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:09,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:09,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1517441348, now seen corresponding path program 1 times [2021-11-03 04:33:09,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:09,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480898208] [2021-11-03 04:33:09,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:09,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:09,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:09,724 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:09,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:33:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:10,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:33:10,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:11,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:11,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:11,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480898208] [2021-11-03 04:33:11,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480898208] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:33:11,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1485208763] [2021-11-03 04:33:11,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:11,290 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:33:11,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:33:11,296 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:33:11,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-03 04:33:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:12,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:33:12,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:33:12,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:33:12,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1485208763] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:12,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:33:12,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-03 04:33:12,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577565912] [2021-11-03 04:33:12,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:33:12,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:12,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:33:12,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:33:12,423 INFO L87 Difference]: Start difference. First operand 827 states and 1091 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:12,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:12,547 INFO L93 Difference]: Finished difference Result 2449 states and 3238 transitions. [2021-11-03 04:33:12,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:33:12,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 16 [2021-11-03 04:33:12,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:12,558 INFO L225 Difference]: With dead ends: 2449 [2021-11-03 04:33:12,559 INFO L226 Difference]: Without dead ends: 1634 [2021-11-03 04:33:12,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:33:12,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2021-11-03 04:33:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1630. [2021-11-03 04:33:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1627 states have (on average 1.322679778733866) internal successors, (2152), 1629 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:12,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 2152 transitions. [2021-11-03 04:33:12,634 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 2152 transitions. Word has length 16 [2021-11-03 04:33:12,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:12,635 INFO L470 AbstractCegarLoop]: Abstraction has 1630 states and 2152 transitions. [2021-11-03 04:33:12,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:12,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 2152 transitions. [2021-11-03 04:33:12,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-03 04:33:12,637 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:12,638 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:33:12,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:12,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:13,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:33:13,044 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:13,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:13,044 INFO L85 PathProgramCache]: Analyzing trace with hash 639471502, now seen corresponding path program 1 times [2021-11-03 04:33:13,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:13,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283716732] [2021-11-03 04:33:13,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:13,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:13,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:13,048 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:13,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:33:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:14,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:33:14,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:14,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:14,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:14,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283716732] [2021-11-03 04:33:14,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283716732] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:33:14,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [609484799] [2021-11-03 04:33:14,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:14,515 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:33:14,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:33:14,516 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:33:14,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-03 04:33:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:15,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:33:15,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:33:15,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:33:15,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [609484799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:15,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:33:15,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-03 04:33:15,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669758470] [2021-11-03 04:33:15,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:33:15,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:15,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:33:15,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-03 04:33:15,664 INFO L87 Difference]: Start difference. First operand 1630 states and 2152 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:16,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:16,079 INFO L93 Difference]: Finished difference Result 5250 states and 6968 transitions. [2021-11-03 04:33:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:33:16,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 31 [2021-11-03 04:33:16,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:16,102 INFO L225 Difference]: With dead ends: 5250 [2021-11-03 04:33:16,102 INFO L226 Difference]: Without dead ends: 3634 [2021-11-03 04:33:16,106 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:33:16,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2021-11-03 04:33:16,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 1533. [2021-11-03 04:33:16,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1530 states have (on average 1.3261437908496732) internal successors, (2029), 1532 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 2029 transitions. [2021-11-03 04:33:16,203 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 2029 transitions. Word has length 31 [2021-11-03 04:33:16,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:16,204 INFO L470 AbstractCegarLoop]: Abstraction has 1533 states and 2029 transitions. [2021-11-03 04:33:16,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 2029 transitions. [2021-11-03 04:33:16,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-03 04:33:16,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:16,217 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:33:16,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:16,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:16,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:33:16,631 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:16,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:16,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1341178206, now seen corresponding path program 1 times [2021-11-03 04:33:16,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:16,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576025312] [2021-11-03 04:33:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:16,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:16,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:16,635 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:16,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:33:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:17,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:33:17,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:17,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:18,139 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:18,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576025312] [2021-11-03 04:33:18,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576025312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:33:18,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1366987502] [2021-11-03 04:33:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:18,140 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:33:18,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:33:18,155 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:33:18,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-03 04:33:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:18,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:33:18,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:33:19,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:33:19,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1366987502] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:19,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:33:19,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-03 04:33:19,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553504052] [2021-11-03 04:33:19,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:33:19,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:19,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:33:19,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-03 04:33:19,378 INFO L87 Difference]: Start difference. First operand 1533 states and 2029 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:19,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:19,697 INFO L93 Difference]: Finished difference Result 3053 states and 4045 transitions. [2021-11-03 04:33:19,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:33:19,699 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 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 32 [2021-11-03 04:33:19,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:19,712 INFO L225 Difference]: With dead ends: 3053 [2021-11-03 04:33:19,713 INFO L226 Difference]: Without dead ends: 2237 [2021-11-03 04:33:19,715 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:33:19,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-11-03 04:33:19,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 1533. [2021-11-03 04:33:19,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1530 states have (on average 1.3254901960784313) internal successors, (2028), 1532 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:19,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 2028 transitions. [2021-11-03 04:33:19,833 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 2028 transitions. Word has length 32 [2021-11-03 04:33:19,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:19,833 INFO L470 AbstractCegarLoop]: Abstraction has 1533 states and 2028 transitions. [2021-11-03 04:33:19,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:19,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 2028 transitions. [2021-11-03 04:33:19,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-03 04:33:19,835 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:19,836 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:33:19,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:20,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-03 04:33:20,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:33:20,243 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:20,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:20,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1826872972, now seen corresponding path program 1 times [2021-11-03 04:33:20,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:20,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533985673] [2021-11-03 04:33:20,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:20,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:20,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:20,246 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:20,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:33:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:21,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:33:21,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:21,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:21,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:21,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533985673] [2021-11-03 04:33:21,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533985673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:33:21,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1284232163] [2021-11-03 04:33:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:21,696 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:33:21,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:33:21,697 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:33:21,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-03 04:33:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:23,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:33:23,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:23,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:23,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1284232163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:33:23,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268051159] [2021-11-03 04:33:23,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:23,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:33:23,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:33:23,543 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:33:23,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-03 04:33:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:24,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:33:24,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:33:24,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:33:25,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268051159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:25,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-03 04:33:25,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-03 04:33:25,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845386667] [2021-11-03 04:33:25,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:33:25,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:25,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:33:25,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:33:25,197 INFO L87 Difference]: Start difference. First operand 1533 states and 2028 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:27,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:27,845 INFO L93 Difference]: Finished difference Result 6197 states and 8217 transitions. [2021-11-03 04:33:27,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:33:27,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-03 04:33:27,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:27,877 INFO L225 Difference]: With dead ends: 6197 [2021-11-03 04:33:27,877 INFO L226 Difference]: Without dead ends: 5379 [2021-11-03 04:33:27,881 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:33:27,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5379 states. [2021-11-03 04:33:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5379 to 4655. [2021-11-03 04:33:28,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4652 states have (on average 1.3269561478933791) internal successors, (6173), 4654 states have internal predecessors, (6173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 6173 transitions. [2021-11-03 04:33:28,104 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 6173 transitions. Word has length 33 [2021-11-03 04:33:28,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:28,106 INFO L470 AbstractCegarLoop]: Abstraction has 4655 states and 6173 transitions. [2021-11-03 04:33:28,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:28,106 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 6173 transitions. [2021-11-03 04:33:28,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-03 04:33:28,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:28,112 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:33:28,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:28,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:28,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:28,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:33:28,730 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:28,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:28,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1432552119, now seen corresponding path program 1 times [2021-11-03 04:33:28,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:28,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767328943] [2021-11-03 04:33:28,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:28,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:28,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:28,733 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:28,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:33:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:29,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:33:29,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:29,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:30,180 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:30,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767328943] [2021-11-03 04:33:30,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767328943] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:33:30,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1416864916] [2021-11-03 04:33:30,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:30,181 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:33:30,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:33:30,195 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:33:30,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-03 04:33:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:31,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:33:31,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:31,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:32,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1416864916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:33:32,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209706647] [2021-11-03 04:33:32,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:32,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:33:32,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:33:32,079 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:33:32,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-03 04:33:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:33,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:33:33,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:33,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:33,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209706647] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:33:33,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:33:33,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-03 04:33:33,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753395236] [2021-11-03 04:33:33,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:33:33,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:33,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:33:33,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:33:33,465 INFO L87 Difference]: Start difference. First operand 4655 states and 6173 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:33,909 INFO L93 Difference]: Finished difference Result 9310 states and 12349 transitions. [2021-11-03 04:33:33,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:33:33,909 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 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 37 [2021-11-03 04:33:33,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:33,938 INFO L225 Difference]: With dead ends: 9310 [2021-11-03 04:33:33,938 INFO L226 Difference]: Without dead ends: 4663 [2021-11-03 04:33:33,946 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:33:33,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4663 states. [2021-11-03 04:33:34,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4663 to 4663. [2021-11-03 04:33:34,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4660 states have (on average 1.3263948497854077) internal successors, (6181), 4662 states have internal predecessors, (6181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:34,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 6181 transitions. [2021-11-03 04:33:34,217 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 6181 transitions. Word has length 37 [2021-11-03 04:33:34,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:34,217 INFO L470 AbstractCegarLoop]: Abstraction has 4663 states and 6181 transitions. [2021-11-03 04:33:34,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:34,218 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 6181 transitions. [2021-11-03 04:33:34,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 04:33:34,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:34,219 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:33:34,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:34,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:34,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:34,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:33:34,820 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:34,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:34,820 INFO L85 PathProgramCache]: Analyzing trace with hash 773922983, now seen corresponding path program 2 times [2021-11-03 04:33:34,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:34,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864372825] [2021-11-03 04:33:34,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:33:34,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:34,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:34,822 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:34,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:33:35,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-03 04:33:35,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:33:35,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-03 04:33:35,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:33:36,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:33:36,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:36,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864372825] [2021-11-03 04:33:36,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864372825] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:36,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:33:36,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-03 04:33:36,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003281438] [2021-11-03 04:33:36,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:33:36,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:36,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:33:36,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:33:36,585 INFO L87 Difference]: Start difference. First operand 4663 states and 6181 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:37,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:37,931 INFO L93 Difference]: Finished difference Result 14582 states and 19341 transitions. [2021-11-03 04:33:37,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:33:37,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-03 04:33:37,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:38,004 INFO L225 Difference]: With dead ends: 14582 [2021-11-03 04:33:38,011 INFO L226 Difference]: Without dead ends: 9941 [2021-11-03 04:33:38,022 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:33:38,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9941 states. [2021-11-03 04:33:38,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9941 to 5240. [2021-11-03 04:33:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5240 states, 5237 states have (on average 1.3255680733244224) internal successors, (6942), 5239 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:38,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5240 states to 5240 states and 6942 transitions. [2021-11-03 04:33:38,577 INFO L78 Accepts]: Start accepts. Automaton has 5240 states and 6942 transitions. Word has length 45 [2021-11-03 04:33:38,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:38,578 INFO L470 AbstractCegarLoop]: Abstraction has 5240 states and 6942 transitions. [2021-11-03 04:33:38,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:38,579 INFO L276 IsEmpty]: Start isEmpty. Operand 5240 states and 6942 transitions. [2021-11-03 04:33:38,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-03 04:33:38,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:38,581 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:33:38,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:38,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:33:38,795 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:38,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:38,796 INFO L85 PathProgramCache]: Analyzing trace with hash 114711330, now seen corresponding path program 1 times [2021-11-03 04:33:38,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:38,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121078417] [2021-11-03 04:33:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:38,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:38,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:38,799 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:38,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:33:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:40,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:33:40,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:40,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:41,199 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:41,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121078417] [2021-11-03 04:33:41,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121078417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:33:41,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [349623620] [2021-11-03 04:33:41,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:41,200 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:33:41,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:33:41,201 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:33:41,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 04:33:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:42,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:33:42,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:33:42,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:33:43,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [349623620] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:43,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:33:43,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9, 9] total 18 [2021-11-03 04:33:43,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160917825] [2021-11-03 04:33:43,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:33:43,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:43,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:33:43,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-03 04:33:43,058 INFO L87 Difference]: Start difference. First operand 5240 states and 6942 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:43,933 INFO L93 Difference]: Finished difference Result 19356 states and 25791 transitions. [2021-11-03 04:33:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:33:43,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-03 04:33:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:43,966 INFO L225 Difference]: With dead ends: 19356 [2021-11-03 04:33:43,967 INFO L226 Difference]: Without dead ends: 14138 [2021-11-03 04:33:43,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-03 04:33:44,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14138 states. [2021-11-03 04:33:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14138 to 14130. [2021-11-03 04:33:45,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14130 states, 14127 states have (on average 1.3334749062079705) internal successors, (18838), 14129 states have internal predecessors, (18838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:45,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14130 states to 14130 states and 18838 transitions. [2021-11-03 04:33:45,195 INFO L78 Accepts]: Start accepts. Automaton has 14130 states and 18838 transitions. Word has length 46 [2021-11-03 04:33:45,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:45,197 INFO L470 AbstractCegarLoop]: Abstraction has 14130 states and 18838 transitions. [2021-11-03 04:33:45,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:45,198 INFO L276 IsEmpty]: Start isEmpty. Operand 14130 states and 18838 transitions. [2021-11-03 04:33:45,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-03 04:33:45,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:45,200 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:33:45,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:45,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:45,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:33:45,619 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:45,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:45,620 INFO L85 PathProgramCache]: Analyzing trace with hash -361562600, now seen corresponding path program 1 times [2021-11-03 04:33:45,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:45,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825082368] [2021-11-03 04:33:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:45,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:45,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:45,622 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:45,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:33:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:46,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:33:46,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:47,170 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:47,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:47,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:47,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825082368] [2021-11-03 04:33:47,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825082368] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:33:47,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1999109860] [2021-11-03 04:33:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:47,741 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:33:47,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:33:47,752 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:33:47,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-03 04:33:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:49,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:33:49,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:49,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:50,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1999109860] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:33:50,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036937007] [2021-11-03 04:33:50,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:50,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:33:50,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:33:50,077 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:33:50,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-03 04:33:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:51,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:33:51,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:33:51,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:33:51,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036937007] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:51,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-03 04:33:51,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 9, 9, 9] total 20 [2021-11-03 04:33:51,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951622771] [2021-11-03 04:33:51,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:33:51,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:51,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:33:51,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-03 04:33:51,628 INFO L87 Difference]: Start difference. First operand 14130 states and 18838 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:52,998 INFO L93 Difference]: Finished difference Result 24442 states and 32555 transitions. [2021-11-03 04:33:52,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:33:52,999 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-03 04:33:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:53,056 INFO L225 Difference]: With dead ends: 24442 [2021-11-03 04:33:53,056 INFO L226 Difference]: Without dead ends: 24438 [2021-11-03 04:33:53,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-11-03 04:33:53,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24438 states. [2021-11-03 04:33:54,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24438 to 14138. [2021-11-03 04:33:54,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14138 states, 14135 states have (on average 1.3332861690838345) internal successors, (18846), 14137 states have internal predecessors, (18846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14138 states to 14138 states and 18846 transitions. [2021-11-03 04:33:54,266 INFO L78 Accepts]: Start accepts. Automaton has 14138 states and 18846 transitions. Word has length 48 [2021-11-03 04:33:54,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:54,266 INFO L470 AbstractCegarLoop]: Abstraction has 14138 states and 18846 transitions. [2021-11-03 04:33:54,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:54,267 INFO L276 IsEmpty]: Start isEmpty. Operand 14138 states and 18846 transitions. [2021-11-03 04:33:54,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 04:33:54,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:54,269 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-03 04:33:54,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-03 04:33:54,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-03 04:33:54,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-03 04:33:54,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:33:54,884 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:54,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:54,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1882477428, now seen corresponding path program 1 times [2021-11-03 04:33:54,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:54,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876230534] [2021-11-03 04:33:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:54,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:54,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:54,886 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:54,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:33:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:56,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:33:56,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:33:56,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:33:57,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:57,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876230534] [2021-11-03 04:33:57,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876230534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:33:57,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1380558618] [2021-11-03 04:33:57,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:57,101 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:33:57,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:33:57,101 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:33:57,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-03 04:33:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:58,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:33:58,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:33:58,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:33:58,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1380558618] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:58,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:33:58,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 9] total 20 [2021-11-03 04:33:58,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154172746] [2021-11-03 04:33:58,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:33:58,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:58,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:33:58,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-11-03 04:33:58,842 INFO L87 Difference]: Start difference. First operand 14138 states and 18846 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:59,253 INFO L93 Difference]: Finished difference Result 17613 states and 23463 transitions. [2021-11-03 04:33:59,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:33:59,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 04:33:59,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:59,262 INFO L225 Difference]: With dead ends: 17613 [2021-11-03 04:33:59,262 INFO L226 Difference]: Without dead ends: 3497 [2021-11-03 04:33:59,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-11-03 04:33:59,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3497 states. [2021-11-03 04:33:59,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3497 to 3497. [2021-11-03 04:33:59,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3497 states, 3495 states have (on average 1.325035765379113) internal successors, (4631), 3496 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:59,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3497 states to 3497 states and 4631 transitions. [2021-11-03 04:33:59,636 INFO L78 Accepts]: Start accepts. Automaton has 3497 states and 4631 transitions. Word has length 52 [2021-11-03 04:33:59,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:59,637 INFO L470 AbstractCegarLoop]: Abstraction has 3497 states and 4631 transitions. [2021-11-03 04:33:59,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:59,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3497 states and 4631 transitions. [2021-11-03 04:33:59,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:33:59,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:59,640 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-03 04:33:59,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:59,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:00,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:34:00,063 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:00,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:00,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1031418001, now seen corresponding path program 1 times [2021-11-03 04:34:00,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:00,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219391953] [2021-11-03 04:34:00,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:00,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:00,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:00,067 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:00,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:34:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:01,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:34:01,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:34:01,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:34:02,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:02,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219391953] [2021-11-03 04:34:02,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219391953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:34:02,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [311871568] [2021-11-03 04:34:02,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:02,364 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:34:02,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:34:02,365 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:34:02,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-03 04:34:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:03,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:34:03,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-03 04:34:04,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-03 04:34:04,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [311871568] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:04,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:34:04,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [9, 9] total 20 [2021-11-03 04:34:04,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568938929] [2021-11-03 04:34:04,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:34:04,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:04,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:34:04,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-03 04:34:04,368 INFO L87 Difference]: Start difference. First operand 3497 states and 4631 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:05,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:05,668 INFO L93 Difference]: Finished difference Result 16591 states and 21993 transitions. [2021-11-03 04:34:05,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:34:05,669 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:34:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:05,693 INFO L225 Difference]: With dead ends: 16591 [2021-11-03 04:34:05,693 INFO L226 Difference]: Without dead ends: 13116 [2021-11-03 04:34:05,705 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-11-03 04:34:05,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13116 states. [2021-11-03 04:34:06,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13116 to 3503. [2021-11-03 04:34:06,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3501 states have (on average 1.3244787203656099) internal successors, (4637), 3502 states have internal predecessors, (4637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:06,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 4637 transitions. [2021-11-03 04:34:06,220 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 4637 transitions. Word has length 59 [2021-11-03 04:34:06,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:06,221 INFO L470 AbstractCegarLoop]: Abstraction has 3503 states and 4637 transitions. [2021-11-03 04:34:06,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:06,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 4637 transitions. [2021-11-03 04:34:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:34:06,224 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:06,224 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-03 04:34:06,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:06,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:06,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:34:06,633 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:06,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1732482579, now seen corresponding path program 1 times [2021-11-03 04:34:06,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:06,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369035413] [2021-11-03 04:34:06,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:06,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:06,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:06,636 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:06,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 04:34:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:08,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:34:08,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:34:08,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:34:09,023 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:09,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369035413] [2021-11-03 04:34:09,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369035413] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:34:09,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [359168190] [2021-11-03 04:34:09,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:09,023 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:34:09,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:34:09,024 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:34:09,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-03 04:34:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:11,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:34:11,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:34:11,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:34:11,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [359168190] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:34:11,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373116597] [2021-11-03 04:34:11,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:11,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:34:11,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:34:11,614 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:34:11,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-03 04:34:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:12,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:34:12,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:34:13,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:34:13,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373116597] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:13,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-03 04:34:13,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 9, 9, 9] total 20 [2021-11-03 04:34:13,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258911924] [2021-11-03 04:34:13,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:34:13,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:13,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:34:13,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-03 04:34:13,459 INFO L87 Difference]: Start difference. First operand 3503 states and 4637 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:13,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:13,900 INFO L93 Difference]: Finished difference Result 6293 states and 8332 transitions. [2021-11-03 04:34:13,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:34:13,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:34:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:13,903 INFO L225 Difference]: With dead ends: 6293 [2021-11-03 04:34:13,903 INFO L226 Difference]: Without dead ends: 2802 [2021-11-03 04:34:13,909 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-03 04:34:13,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2021-11-03 04:34:14,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 2163. [2021-11-03 04:34:14,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2161 states have (on average 1.3206848681166128) internal successors, (2854), 2162 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:14,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 2854 transitions. [2021-11-03 04:34:14,197 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 2854 transitions. Word has length 59 [2021-11-03 04:34:14,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:14,197 INFO L470 AbstractCegarLoop]: Abstraction has 2163 states and 2854 transitions. [2021-11-03 04:34:14,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:14,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 2854 transitions. [2021-11-03 04:34:14,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 04:34:14,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:14,199 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-03 04:34:14,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:14,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:14,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-03 04:34:14,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:34:14,804 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:14,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:14,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1523610449, now seen corresponding path program 1 times [2021-11-03 04:34:14,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:14,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139886811] [2021-11-03 04:34:14,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:14,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:14,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:14,807 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:14,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 04:34:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:16,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:34:16,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:34:16,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:34:17,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:17,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139886811] [2021-11-03 04:34:17,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139886811] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:34:17,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1770229085] [2021-11-03 04:34:17,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:17,285 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:34:17,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:34:17,306 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:34:17,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-03 04:34:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:18,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:34:18,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-03 04:34:19,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-03 04:34:19,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1770229085] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:19,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:34:19,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [9, 9] total 17 [2021-11-03 04:34:19,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898820562] [2021-11-03 04:34:19,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:34:19,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:19,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:34:19,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-03 04:34:19,394 INFO L87 Difference]: Start difference. First operand 2163 states and 2854 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:19,589 INFO L93 Difference]: Finished difference Result 4295 states and 5670 transitions. [2021-11-03 04:34:19,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:34:19,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-03 04:34:19,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:19,592 INFO L225 Difference]: With dead ends: 4295 [2021-11-03 04:34:19,592 INFO L226 Difference]: Without dead ends: 2154 [2021-11-03 04:34:19,595 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-03 04:34:19,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-11-03 04:34:19,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2154. [2021-11-03 04:34:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2154 states, 2152 states have (on average 1.3178438661710037) internal successors, (2836), 2153 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:19,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 2836 transitions. [2021-11-03 04:34:19,968 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 2836 transitions. Word has length 64 [2021-11-03 04:34:19,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:19,969 INFO L470 AbstractCegarLoop]: Abstraction has 2154 states and 2836 transitions. [2021-11-03 04:34:19,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:19,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 2836 transitions. [2021-11-03 04:34:19,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:34:19,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:19,972 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-03 04:34:20,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:20,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:20,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:34:20,395 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:20,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:20,396 INFO L85 PathProgramCache]: Analyzing trace with hash -785581239, now seen corresponding path program 1 times [2021-11-03 04:34:20,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:20,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273099359] [2021-11-03 04:34:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:20,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:20,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:20,398 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:20,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-03 04:34:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:21,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:34:21,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:34:22,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:34:23,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:23,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273099359] [2021-11-03 04:34:23,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273099359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:34:23,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1362406653] [2021-11-03 04:34:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:23,038 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:34:23,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:34:23,043 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:34:23,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-03 04:34:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:25,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:34:25,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:34:25,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:34:25,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1362406653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:34:25,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529202261] [2021-11-03 04:34:25,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:25,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:34:25,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:34:25,864 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:34:25,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-03 04:34:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:27,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:34:27,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:34:27,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:34:27,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529202261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:34:27,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:34:27,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-11-03 04:34:27,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753768745] [2021-11-03 04:34:27,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-03 04:34:27,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:27,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-03 04:34:27,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:34:27,987 INFO L87 Difference]: Start difference. First operand 2154 states and 2836 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:29,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:29,183 INFO L93 Difference]: Finished difference Result 4308 states and 5679 transitions. [2021-11-03 04:34:29,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 04:34:29,184 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-03 04:34:29,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:29,186 INFO L225 Difference]: With dead ends: 4308 [2021-11-03 04:34:29,186 INFO L226 Difference]: Without dead ends: 2170 [2021-11-03 04:34:29,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-03 04:34:29,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-11-03 04:34:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 2170. [2021-11-03 04:34:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2168 states have (on average 1.3154981549815499) internal successors, (2852), 2169 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 2852 transitions. [2021-11-03 04:34:29,444 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 2852 transitions. Word has length 68 [2021-11-03 04:34:29,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:29,444 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 2852 transitions. [2021-11-03 04:34:29,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:29,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 2852 transitions. [2021-11-03 04:34:29,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-03 04:34:29,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:29,446 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 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] [2021-11-03 04:34:29,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:29,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:29,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:30,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:34:30,060 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:30,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:30,061 INFO L85 PathProgramCache]: Analyzing trace with hash -2096876695, now seen corresponding path program 2 times [2021-11-03 04:34:30,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:30,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805303431] [2021-11-03 04:34:30,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:34:30,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:30,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:30,063 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:30,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-03 04:35:26,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:35:26,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:35:26,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 04:35:26,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:35:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:35:27,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:35:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:35:29,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:35:29,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805303431] [2021-11-03 04:35:29,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805303431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:35:29,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2049253956] [2021-11-03 04:35:29,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:35:29,723 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:35:29,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:35:29,725 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:35:29,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-03 04:36:39,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:36:39,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:36:39,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 04:36:39,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:36:39,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:36:40,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2049253956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:36:40,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758282960] [2021-11-03 04:36:40,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:36:40,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:36:40,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:36:40,174 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:36:40,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-03 04:37:10,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:37:10,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:37:10,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 04:37:10,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:37:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:37:11,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:37:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:37:11,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758282960] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:37:11,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:37:11,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 32 [2021-11-03 04:37:11,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284128132] [2021-11-03 04:37:11,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-03 04:37:11,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:37:11,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-03 04:37:11,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-11-03 04:37:11,466 INFO L87 Difference]: Start difference. First operand 2170 states and 2852 transitions. Second operand has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:16,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:37:16,021 INFO L93 Difference]: Finished difference Result 4340 states and 5719 transitions. [2021-11-03 04:37:16,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-03 04:37:16,022 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 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 84 [2021-11-03 04:37:16,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:37:16,024 INFO L225 Difference]: With dead ends: 4340 [2021-11-03 04:37:16,025 INFO L226 Difference]: Without dead ends: 2202 [2021-11-03 04:37:16,028 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-11-03 04:37:16,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-11-03 04:37:16,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2202. [2021-11-03 04:37:16,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2200 states have (on average 1.3109090909090908) internal successors, (2884), 2201 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 2884 transitions. [2021-11-03 04:37:16,418 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 2884 transitions. Word has length 84 [2021-11-03 04:37:16,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:37:16,418 INFO L470 AbstractCegarLoop]: Abstraction has 2202 states and 2884 transitions. [2021-11-03 04:37:16,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:16,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 2884 transitions. [2021-11-03 04:37:16,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-03 04:37:16,422 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:37:16,422 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 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] [2021-11-03 04:37:16,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-03 04:37:16,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-03 04:37:16,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-03 04:37:17,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:37:17,028 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:37:17,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:37:17,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1721099177, now seen corresponding path program 3 times [2021-11-03 04:37:17,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:37:17,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313410939] [2021-11-03 04:37:17,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:37:17,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:37:17,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:37:17,031 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:37:17,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-03 04:38:44,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-11-03 04:38:44,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:38:44,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-03 04:38:44,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:38:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:38:47,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:38:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:38:54,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:38:54,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313410939] [2021-11-03 04:38:54,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313410939] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:38:54,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2071045924] [2021-11-03 04:38:54,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:38:54,487 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:38:54,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:38:54,488 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:38:54,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-03 04:42:59,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-11-03 04:42:59,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:42:59,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-03 04:42:59,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:43:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:43:00,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:43:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:43:01,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2071045924] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:43:01,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627023248] [2021-11-03 04:43:01,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:43:01,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:43:01,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:43:01,967 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:43:01,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3428ae0d-99d3-409a-b5d5-3a987d42e596/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process