./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1bad5b7f91b61cdf9d4f1ace01330b8d7c80f8ede0ca40c43d18f706f54101eb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:03:51,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:03:51,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:03:51,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:03:51,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:03:51,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:03:51,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:03:51,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:03:51,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:03:51,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:03:51,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:03:51,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:03:51,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:03:51,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:03:51,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:03:51,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:03:51,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:03:51,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:03:51,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:03:51,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:03:51,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:03:51,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:03:51,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:03:51,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:03:51,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:03:51,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:03:51,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:03:51,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:03:51,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:03:51,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:03:51,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:03:51,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:03:51,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:03:51,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:03:51,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:03:51,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:03:51,595 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:03:51,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:03:51,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:03:51,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:03:51,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:03:51,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 02:03:51,639 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:03:51,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:03:51,641 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:03:51,641 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:03:51,641 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:03:51,642 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:03:51,642 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:03:51,642 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:03:51,643 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:03:51,643 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:03:51,643 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:03:51,644 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:03:51,644 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:03:51,645 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:03:51,645 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:03:51,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:03:51,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:03:51,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:03:51,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:03:51,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:03:51,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:03:51,648 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:03:51,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:03:51,649 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:03:51,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:03:51,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:03:51,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:03:51,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:03:51,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:03:51,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:03:51,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:03:51,652 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:03:51,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:03:51,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:03:51,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:03:51,653 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:03:51,653 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_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bad5b7f91b61cdf9d4f1ace01330b8d7c80f8ede0ca40c43d18f706f54101eb [2021-11-07 02:03:51,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:03:52,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:03:52,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:03:52,033 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:03:52,034 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:03:52,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 02:03:52,137 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/data/e57333514/a2b272fa5be845c8aa6ba6d99955d8d2/FLAGd53755cc8 [2021-11-07 02:03:53,132 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:03:53,132 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 02:03:53,182 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/data/e57333514/a2b272fa5be845c8aa6ba6d99955d8d2/FLAGd53755cc8 [2021-11-07 02:03:53,598 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/data/e57333514/a2b272fa5be845c8aa6ba6d99955d8d2 [2021-11-07 02:03:53,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:03:53,604 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:03:53,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:03:53,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:03:53,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:03:53,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:03:53" (1/1) ... [2021-11-07 02:03:53,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@110e70b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:53, skipping insertion in model container [2021-11-07 02:03:53,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:03:53" (1/1) ... [2021-11-07 02:03:53,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:03:53,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:03:55,022 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_2f609de7-3ba5-4843-a674-bce0ebb574d3/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2021-11-07 02:03:55,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:03:55,096 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:03:55,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4f9111a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:55, skipping insertion in model container [2021-11-07 02:03:55,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:03:55,097 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:03:55,102 INFO L168 Benchmark]: Toolchain (without parser) took 1494.20 ms. Allocated memory was 113.2 MB in the beginning and 151.0 MB in the end (delta: 37.7 MB). Free memory was 77.0 MB in the beginning and 87.4 MB in the end (delta: -10.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-11-07 02:03:55,103 INFO L168 Benchmark]: CDTParser took 0.79 ms. Allocated memory is still 113.2 MB. Free memory is still 66.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:03:55,104 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1488.27 ms. Allocated memory was 113.2 MB in the beginning and 151.0 MB in the end (delta: 37.7 MB). Free memory was 76.7 MB in the beginning and 87.4 MB in the end (delta: -10.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-11-07 02:03:55,106 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.79 ms. Allocated memory is still 113.2 MB. Free memory is still 66.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1488.27 ms. Allocated memory was 113.2 MB in the beginning and 151.0 MB in the end (delta: 37.7 MB). Free memory was 76.7 MB in the beginning and 87.4 MB in the end (delta: -10.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3619]: 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_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1bad5b7f91b61cdf9d4f1ace01330b8d7c80f8ede0ca40c43d18f706f54101eb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:03:57,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:03:57,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:03:57,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:03:57,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:03:57,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:03:57,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:03:57,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:03:57,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:03:57,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:03:57,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:03:57,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:03:57,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:03:57,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:03:57,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:03:57,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:03:57,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:03:57,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:03:57,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:03:57,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:03:57,898 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:03:57,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:03:57,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:03:57,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:03:57,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:03:57,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:03:57,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:03:57,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:03:57,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:03:57,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:03:57,918 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:03:57,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:03:57,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:03:57,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:03:57,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:03:57,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:03:57,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:03:57,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:03:57,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:03:57,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:03:57,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:03:57,941 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 02:03:57,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:03:57,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:03:58,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:03:58,000 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:03:58,000 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:03:58,001 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:03:58,001 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:03:58,001 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:03:58,002 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:03:58,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:03:58,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:03:58,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:03:58,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:03:58,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:03:58,006 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:03:58,007 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:03:58,007 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:03:58,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:03:58,008 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:03:58,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:03:58,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:03:58,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:03:58,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:03:58,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:03:58,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:03:58,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:03:58,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:03:58,011 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:03:58,011 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:03:58,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:03:58,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:03:58,012 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:03:58,012 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_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bad5b7f91b61cdf9d4f1ace01330b8d7c80f8ede0ca40c43d18f706f54101eb [2021-11-07 02:03:58,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:03:58,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:03:58,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:03:58,563 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:03:58,564 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:03:58,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 02:03:58,648 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/data/c746da9df/f056d60a96ff47c697911fd7f6b46b0e/FLAGee0615b9b [2021-11-07 02:03:59,605 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:03:59,605 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 02:03:59,648 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/data/c746da9df/f056d60a96ff47c697911fd7f6b46b0e/FLAGee0615b9b [2021-11-07 02:04:00,047 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/data/c746da9df/f056d60a96ff47c697911fd7f6b46b0e [2021-11-07 02:04:00,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:04:00,052 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:04:00,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:04:00,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:04:00,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:04:00,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:00" (1/1) ... [2021-11-07 02:04:00,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d1d0ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:00, skipping insertion in model container [2021-11-07 02:04:00,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:00" (1/1) ... [2021-11-07 02:04:00,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:04:00,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:04:01,333 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_2f609de7-3ba5-4843-a674-bce0ebb574d3/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2021-11-07 02:04:01,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:04:01,406 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:04:01,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:04:01,745 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_2f609de7-3ba5-4843-a674-bce0ebb574d3/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2021-11-07 02:04:01,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:04:01,786 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:04:02,217 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_2f609de7-3ba5-4843-a674-bce0ebb574d3/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2021-11-07 02:04:02,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:04:02,312 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:04:02,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:02 WrapperNode [2021-11-07 02:04:02,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:04:02,316 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:04:02,316 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:04:02,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:04:02,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:02" (1/1) ... [2021-11-07 02:04:02,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:02" (1/1) ... [2021-11-07 02:04:02,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:04:02,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:04:02,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:04:02,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:04:02,695 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:02" (1/1) ... [2021-11-07 02:04:02,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:02" (1/1) ... [2021-11-07 02:04:02,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:02" (1/1) ... [2021-11-07 02:04:02,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:02" (1/1) ... [2021-11-07 02:04:02,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:02" (1/1) ... [2021-11-07 02:04:02,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:02" (1/1) ... [2021-11-07 02:04:02,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:02" (1/1) ... [2021-11-07 02:04:03,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:04:03,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:04:03,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:04:03,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:04:03,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:02" (1/1) ... [2021-11-07 02:04:03,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:04:03,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:04:03,079 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:04:03,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:04:03,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:04:03,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 02:04:03,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:04:03,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 02:04:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 02:04:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 02:04:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 02:04:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 02:04:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 02:04:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 02:04:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:04:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:04:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:04:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 02:04:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 02:04:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 02:04:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:04:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 02:04:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 02:04:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:04:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:04:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:04:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 02:04:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:04:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 02:04:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 02:04:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 02:04:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:04:03,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:04:46,620 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:04:46,621 INFO L299 CfgBuilder]: Removed 759 assume(true) statements. [2021-11-07 02:04:46,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:04:46 BoogieIcfgContainer [2021-11-07 02:04:46,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:04:46,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:04:46,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:04:46,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:04:46,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:04:00" (1/3) ... [2021-11-07 02:04:46,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651bf3cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:04:46, skipping insertion in model container [2021-11-07 02:04:46,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:02" (2/3) ... [2021-11-07 02:04:46,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651bf3cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:04:46, skipping insertion in model container [2021-11-07 02:04:46,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:04:46" (3/3) ... [2021-11-07 02:04:46,636 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 02:04:46,643 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:04:46,643 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-07 02:04:46,721 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:04:46,728 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:04:46,728 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-07 02:04:46,772 INFO L276 IsEmpty]: Start isEmpty. Operand has 880 states, 868 states have (on average 1.4688940092165899) internal successors, (1275), 879 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:46,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:04:46,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:46,787 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:46,788 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:04:46,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:46,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1003833369, now seen corresponding path program 1 times [2021-11-07 02:04:46,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:46,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503932590] [2021-11-07 02:04:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:46,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:46,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:46,821 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:46,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:04:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:48,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:04:48,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:49,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:49,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:49,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503932590] [2021-11-07 02:04:49,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503932590] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:49,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:49,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:04:49,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514418508] [2021-11-07 02:04:49,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:04:49,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:49,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:04:49,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:04:49,928 INFO L87 Difference]: Start difference. First operand has 880 states, 868 states have (on average 1.4688940092165899) internal successors, (1275), 879 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:50,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:50,042 INFO L93 Difference]: Finished difference Result 1756 states and 2545 transitions. [2021-11-07 02:04:50,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:04:50,044 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-11-07 02:04:50,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:50,069 INFO L225 Difference]: With dead ends: 1756 [2021-11-07 02:04:50,069 INFO L226 Difference]: Without dead ends: 868 [2021-11-07 02:04:50,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:04:50,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-11-07 02:04:50,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 868. [2021-11-07 02:04:50,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 857 states have (on average 1.3990665110851808) internal successors, (1199), 867 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1199 transitions. [2021-11-07 02:04:50,187 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1199 transitions. Word has length 54 [2021-11-07 02:04:50,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:50,187 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1199 transitions. [2021-11-07 02:04:50,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:50,188 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1199 transitions. [2021-11-07 02:04:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:04:50,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:50,193 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:50,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:50,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:50,407 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:04:50,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:50,407 INFO L85 PathProgramCache]: Analyzing trace with hash 527454111, now seen corresponding path program 1 times [2021-11-07 02:04:50,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:50,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341221415] [2021-11-07 02:04:50,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:50,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:50,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:50,412 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:50,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:04:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:52,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:04:52,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:53,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:54,089 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:54,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341221415] [2021-11-07 02:04:54,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341221415] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:54,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:54,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:04:54,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758201450] [2021-11-07 02:04:54,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:04:54,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:54,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:04:54,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:04:54,094 INFO L87 Difference]: Start difference. First operand 868 states and 1199 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:58,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:58,483 INFO L93 Difference]: Finished difference Result 2461 states and 3414 transitions. [2021-11-07 02:04:58,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:04:58,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 02:04:58,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:58,497 INFO L225 Difference]: With dead ends: 2461 [2021-11-07 02:04:58,497 INFO L226 Difference]: Without dead ends: 1602 [2021-11-07 02:04:58,501 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:04:58,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2021-11-07 02:04:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 868. [2021-11-07 02:04:58,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 857 states have (on average 1.397899649941657) internal successors, (1198), 867 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:58,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1198 transitions. [2021-11-07 02:04:58,539 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1198 transitions. Word has length 54 [2021-11-07 02:04:58,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:58,540 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1198 transitions. [2021-11-07 02:04:58,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:58,541 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1198 transitions. [2021-11-07 02:04:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:04:58,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:58,545 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:58,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:58,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:58,768 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:04:58,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:58,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1583517125, now seen corresponding path program 1 times [2021-11-07 02:04:58,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:58,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243886808] [2021-11-07 02:04:58,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:58,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:58,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:58,774 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:58,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:05:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:00,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1142 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:05:00,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:01,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:01,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:01,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243886808] [2021-11-07 02:05:01,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243886808] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:01,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:01,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:05:01,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769125384] [2021-11-07 02:05:01,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:05:01,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:01,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:05:01,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:05:01,950 INFO L87 Difference]: Start difference. First operand 868 states and 1198 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:30,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:30,927 INFO L93 Difference]: Finished difference Result 2429 states and 3375 transitions. [2021-11-07 02:05:30,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:05:30,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 02:05:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:30,943 INFO L225 Difference]: With dead ends: 2429 [2021-11-07 02:05:30,943 INFO L226 Difference]: Without dead ends: 1584 [2021-11-07 02:05:30,946 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:05:30,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-11-07 02:05:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 868. [2021-11-07 02:05:30,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 857 states have (on average 1.3967327887981331) internal successors, (1197), 867 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:30,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1197 transitions. [2021-11-07 02:05:30,985 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1197 transitions. Word has length 56 [2021-11-07 02:05:30,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:30,985 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1197 transitions. [2021-11-07 02:05:30,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:30,986 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1197 transitions. [2021-11-07 02:05:30,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:05:30,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:30,991 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:31,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:31,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:31,220 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:05:31,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:31,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1012273783, now seen corresponding path program 1 times [2021-11-07 02:05:31,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:31,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200158437] [2021-11-07 02:05:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:31,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:31,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:31,229 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:31,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:05:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:32,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:05:32,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:33,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:34,080 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:34,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200158437] [2021-11-07 02:05:34,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200158437] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:34,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:34,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:05:34,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151461096] [2021-11-07 02:05:34,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:05:34,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:34,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:05:34,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:34,083 INFO L87 Difference]: Start difference. First operand 868 states and 1197 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:34,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:34,526 INFO L93 Difference]: Finished difference Result 1718 states and 2384 transitions. [2021-11-07 02:05:34,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:05:34,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 02:05:34,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:34,534 INFO L225 Difference]: With dead ends: 1718 [2021-11-07 02:05:34,534 INFO L226 Difference]: Without dead ends: 877 [2021-11-07 02:05:34,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:34,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-11-07 02:05:34,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 877. [2021-11-07 02:05:34,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 866 states have (on average 1.3926096997690531) internal successors, (1206), 876 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:34,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1206 transitions. [2021-11-07 02:05:34,567 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1206 transitions. Word has length 58 [2021-11-07 02:05:34,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:34,568 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 1206 transitions. [2021-11-07 02:05:34,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:34,569 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1206 transitions. [2021-11-07 02:05:34,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:05:34,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:34,571 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:34,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:34,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:34,784 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:05:34,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:34,785 INFO L85 PathProgramCache]: Analyzing trace with hash -599011052, now seen corresponding path program 1 times [2021-11-07 02:05:34,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:34,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410568554] [2021-11-07 02:05:34,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:34,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:34,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:34,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:34,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:05:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:36,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:05:36,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:05:37,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:05:38,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:38,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410568554] [2021-11-07 02:05:38,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410568554] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:38,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1220384439] [2021-11-07 02:05:38,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:38,511 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:38,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:05:38,520 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:05:38,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-07 02:05:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:39,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:39,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:05:39,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:05:40,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1220384439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:40,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:05:40,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:05:40,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800335863] [2021-11-07 02:05:40,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:40,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:40,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:40,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:05:40,349 INFO L87 Difference]: Start difference. First operand 877 states and 1206 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:49,852 INFO L93 Difference]: Finished difference Result 1744 states and 2414 transitions. [2021-11-07 02:05:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:49,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:05:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:49,859 INFO L225 Difference]: With dead ends: 1744 [2021-11-07 02:05:49,859 INFO L226 Difference]: Without dead ends: 917 [2021-11-07 02:05:49,861 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:05:49,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-11-07 02:05:49,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 917. [2021-11-07 02:05:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 906 states have (on average 1.3929359823399559) internal successors, (1262), 916 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:49,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1262 transitions. [2021-11-07 02:05:49,890 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1262 transitions. Word has length 67 [2021-11-07 02:05:49,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:49,891 INFO L470 AbstractCegarLoop]: Abstraction has 917 states and 1262 transitions. [2021-11-07 02:05:49,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:49,891 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1262 transitions. [2021-11-07 02:05:49,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 02:05:49,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:49,893 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:49,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:50,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:50,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:50,301 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:05:50,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:50,302 INFO L85 PathProgramCache]: Analyzing trace with hash -954749224, now seen corresponding path program 1 times [2021-11-07 02:05:50,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:50,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794371506] [2021-11-07 02:05:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:50,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:50,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:50,304 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:50,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:05:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:51,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:05:51,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:05:53,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:05:54,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:54,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794371506] [2021-11-07 02:05:54,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794371506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:54,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1153627961] [2021-11-07 02:05:54,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:54,619 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:54,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:05:54,622 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:05:54,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 02:05:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:55,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:05:55,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:05:56,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:05:57,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1153627961] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:57,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:05:57,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 02:05:57,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815452651] [2021-11-07 02:05:57,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:05:57,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:57,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:05:57,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:05:57,362 INFO L87 Difference]: Start difference. First operand 917 states and 1262 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:00,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:00,343 INFO L93 Difference]: Finished difference Result 2637 states and 3659 transitions. [2021-11-07 02:06:00,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:06:00,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 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 94 [2021-11-07 02:06:00,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:00,359 INFO L225 Difference]: With dead ends: 2637 [2021-11-07 02:06:00,359 INFO L226 Difference]: Without dead ends: 1756 [2021-11-07 02:06:00,361 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:06:00,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-11-07 02:06:00,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 913. [2021-11-07 02:06:00,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 902 states have (on average 1.3902439024390243) internal successors, (1254), 912 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:00,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1254 transitions. [2021-11-07 02:06:00,395 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1254 transitions. Word has length 94 [2021-11-07 02:06:00,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:00,396 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1254 transitions. [2021-11-07 02:06:00,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:00,396 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1254 transitions. [2021-11-07 02:06:00,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 02:06:00,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:00,405 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:00,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:00,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:00,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:00,819 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:06:00,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:00,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1710354903, now seen corresponding path program 1 times [2021-11-07 02:06:00,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:00,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286162916] [2021-11-07 02:06:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:00,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:00,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:00,823 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:00,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:06:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:02,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:06:02,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:06:03,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:05,485 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:06:05,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:05,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286162916] [2021-11-07 02:06:05,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286162916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:05,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1195166409] [2021-11-07 02:06:05,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:05,486 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:05,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:06:05,487 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:06:05,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 02:06:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:06,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:06:06,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:06:07,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:06:08,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1195166409] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:08,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:06:08,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 02:06:08,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607428104] [2021-11-07 02:06:08,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:08,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:08,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:08,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:06:08,313 INFO L87 Difference]: Start difference. First operand 913 states and 1254 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:23,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:23,090 INFO L93 Difference]: Finished difference Result 1949 states and 2749 transitions. [2021-11-07 02:06:23,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:23,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 102 [2021-11-07 02:06:23,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:23,100 INFO L225 Difference]: With dead ends: 1949 [2021-11-07 02:06:23,101 INFO L226 Difference]: Without dead ends: 1086 [2021-11-07 02:06:23,103 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:06:23,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-11-07 02:06:23,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1086. [2021-11-07 02:06:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1075 states have (on average 1.4009302325581396) internal successors, (1506), 1085 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:23,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1506 transitions. [2021-11-07 02:06:23,139 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1506 transitions. Word has length 102 [2021-11-07 02:06:23,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:23,140 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 1506 transitions. [2021-11-07 02:06:23,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:23,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1506 transitions. [2021-11-07 02:06:23,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 02:06:23,142 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:23,142 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:23,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:23,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2021-11-07 02:06:23,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:23,559 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:06:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:23,560 INFO L85 PathProgramCache]: Analyzing trace with hash -578713513, now seen corresponding path program 1 times [2021-11-07 02:06:23,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:23,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107634302] [2021-11-07 02:06:23,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:23,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:23,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:23,566 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:23,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:06:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:25,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 1377 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:06:25,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:06:26,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:06:28,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:28,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107634302] [2021-11-07 02:06:28,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107634302] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:28,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [583656123] [2021-11-07 02:06:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:28,219 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:28,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:06:28,220 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:06:28,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 02:06:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:29,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 1377 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:06:29,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 02:06:29,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 02:06:30,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [583656123] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:30,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:06:30,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:06:30,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630816287] [2021-11-07 02:06:30,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:06:30,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:30,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:06:30,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:06:30,125 INFO L87 Difference]: Start difference. First operand 1086 states and 1506 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:38,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:38,935 INFO L93 Difference]: Finished difference Result 2126 states and 2965 transitions. [2021-11-07 02:06:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:06:38,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 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 106 [2021-11-07 02:06:38,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:38,947 INFO L225 Difference]: With dead ends: 2126 [2021-11-07 02:06:38,947 INFO L226 Difference]: Without dead ends: 1090 [2021-11-07 02:06:38,949 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:06:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-11-07 02:06:38,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 1090. [2021-11-07 02:06:38,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1079 states have (on average 1.3994439295644114) internal successors, (1510), 1089 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:38,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1510 transitions. [2021-11-07 02:06:38,986 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1510 transitions. Word has length 106 [2021-11-07 02:06:38,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:38,987 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1510 transitions. [2021-11-07 02:06:38,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:38,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1510 transitions. [2021-11-07 02:06:38,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 02:06:38,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:38,989 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:39,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:39,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-07 02:06:39,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:39,396 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:06:39,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:39,397 INFO L85 PathProgramCache]: Analyzing trace with hash -578653931, now seen corresponding path program 1 times [2021-11-07 02:06:39,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:39,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133032022] [2021-11-07 02:06:39,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:39,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:39,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:39,399 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:39,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:06:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:41,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:06:41,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:06:42,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:06:44,173 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:44,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133032022] [2021-11-07 02:06:44,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133032022] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:44,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1941778137] [2021-11-07 02:06:44,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:44,174 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:44,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:06:44,175 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:06:44,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 02:06:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:46,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:06:46,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:06:48,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:06:49,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1941778137] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:49,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310840292] [2021-11-07 02:06:49,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:49,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:06:49,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:06:49,026 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:06:49,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 02:06:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:50,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 02:06:50,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:06:53,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:06:55,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310840292] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:55,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:06:55,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5, 5, 5] total 20 [2021-11-07 02:06:55,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589215283] [2021-11-07 02:06:55,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:06:55,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:55,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:06:55,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-07 02:06:55,840 INFO L87 Difference]: Start difference. First operand 1090 states and 1510 transitions. Second operand has 14 states, 14 states have (on average 9.071428571428571) internal successors, (127), 14 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:26,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:26,605 INFO L93 Difference]: Finished difference Result 4900 states and 6897 transitions. [2021-11-07 02:07:26,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 02:07:26,606 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.071428571428571) internal successors, (127), 14 states have internal predecessors, (127), 0 states have call successors, (0), 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 106 [2021-11-07 02:07:26,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:26,635 INFO L225 Difference]: With dead ends: 4900 [2021-11-07 02:07:26,636 INFO L226 Difference]: Without dead ends: 4884 [2021-11-07 02:07:26,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 623 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-11-07 02:07:26,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4884 states. [2021-11-07 02:07:26,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4884 to 2039. [2021-11-07 02:07:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2028 states have (on average 1.4097633136094674) internal successors, (2859), 2038 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:26,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 2859 transitions. [2021-11-07 02:07:26,776 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 2859 transitions. Word has length 106 [2021-11-07 02:07:26,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:26,777 INFO L470 AbstractCegarLoop]: Abstraction has 2039 states and 2859 transitions. [2021-11-07 02:07:26,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.071428571428571) internal successors, (127), 14 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:26,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 2859 transitions. [2021-11-07 02:07:26,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 02:07:26,779 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:26,779 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:26,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:27,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:27,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:27,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:07:27,393 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:07:27,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:27,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1105728711, now seen corresponding path program 1 times [2021-11-07 02:07:27,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:27,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024499340] [2021-11-07 02:07:27,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:27,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:27,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:27,396 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:27,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:07:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:29,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:07:29,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:07:30,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:07:32,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:32,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024499340] [2021-11-07 02:07:32,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024499340] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:07:32,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1938402961] [2021-11-07 02:07:32,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:32,719 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:32,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:07:32,720 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:07:32,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 02:07:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:35,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:07:35,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:07:36,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:07:38,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1938402961] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:07:38,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472895522] [2021-11-07 02:07:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:38,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:07:38,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:07:38,107 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:07:38,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 02:07:39,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:39,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 02:07:39,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 02:07:43,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 02:07:46,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472895522] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:46,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:07:46,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5, 5, 5] total 20 [2021-11-07 02:07:46,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265775143] [2021-11-07 02:07:46,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:07:46,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:46,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:07:46,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-07 02:07:46,091 INFO L87 Difference]: Start difference. First operand 2039 states and 2859 transitions. Second operand has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:22,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:22,184 INFO L93 Difference]: Finished difference Result 10181 states and 14472 transitions. [2021-11-07 02:08:22,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 02:08:22,185 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 0 states have call successors, (0), 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 121 [2021-11-07 02:08:22,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:22,225 INFO L225 Difference]: With dead ends: 10181 [2021-11-07 02:08:22,226 INFO L226 Difference]: Without dead ends: 10165 [2021-11-07 02:08:22,228 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 02:08:22,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10165 states. [2021-11-07 02:08:22,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10165 to 2044. [2021-11-07 02:08:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 2033 states have (on average 1.4087555336940483) internal successors, (2864), 2043 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 2864 transitions. [2021-11-07 02:08:22,415 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 2864 transitions. Word has length 121 [2021-11-07 02:08:22,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:22,416 INFO L470 AbstractCegarLoop]: Abstraction has 2044 states and 2864 transitions. [2021-11-07 02:08:22,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:22,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 2864 transitions. [2021-11-07 02:08:22,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-07 02:08:22,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:22,419 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:22,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:22,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-07 02:08:22,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-07 02:08:23,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:23,041 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:08:23,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:23,041 INFO L85 PathProgramCache]: Analyzing trace with hash -329152188, now seen corresponding path program 1 times [2021-11-07 02:08:23,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:23,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969827477] [2021-11-07 02:08:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:23,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:23,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:23,045 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:23,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:08:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:25,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:08:25,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 02:08:26,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 02:08:28,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:28,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969827477] [2021-11-07 02:08:28,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969827477] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:28,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [60870771] [2021-11-07 02:08:28,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:28,748 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:28,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:28,749 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:28,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:08:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:32,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:08:32,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 02:08:33,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 02:08:34,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [60870771] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:34,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636016656] [2021-11-07 02:08:34,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:34,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:34,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:34,714 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:34,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 02:08:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:36,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 02:08:36,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 02:08:40,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 02:08:43,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636016656] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:43,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:08:43,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 8, 8] total 20 [2021-11-07 02:08:43,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223544178] [2021-11-07 02:08:43,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 02:08:43,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:43,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 02:08:43,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-07 02:08:43,912 INFO L87 Difference]: Start difference. First operand 2044 states and 2864 transitions. Second operand has 20 states, 20 states have (on average 11.6) internal successors, (232), 20 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:31,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:31,831 INFO L93 Difference]: Finished difference Result 14074 states and 19999 transitions. [2021-11-07 02:10:31,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 02:10:31,833 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 11.6) internal successors, (232), 20 states have internal predecessors, (232), 0 states have call successors, (0), 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 128 [2021-11-07 02:10:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:31,869 INFO L225 Difference]: With dead ends: 14074 [2021-11-07 02:10:31,870 INFO L226 Difference]: Without dead ends: 12059 [2021-11-07 02:10:31,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 757 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=304, Invalid=1178, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 02:10:31,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12059 states. [2021-11-07 02:10:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12059 to 3954. [2021-11-07 02:10:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3954 states, 3943 states have (on average 1.4136444331727112) internal successors, (5574), 3953 states have internal predecessors, (5574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:32,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3954 states to 3954 states and 5574 transitions. [2021-11-07 02:10:32,280 INFO L78 Accepts]: Start accepts. Automaton has 3954 states and 5574 transitions. Word has length 128 [2021-11-07 02:10:32,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:32,281 INFO L470 AbstractCegarLoop]: Abstraction has 3954 states and 5574 transitions. [2021-11-07 02:10:32,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.6) internal successors, (232), 20 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:32,281 INFO L276 IsEmpty]: Start isEmpty. Operand 3954 states and 5574 transitions. [2021-11-07 02:10:32,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-07 02:10:32,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:32,291 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:32,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:32,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:32,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:32,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:32,905 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:10:32,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:32,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1219093779, now seen corresponding path program 1 times [2021-11-07 02:10:32,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:32,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343730419] [2021-11-07 02:10:32,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:32,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:32,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:32,908 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:32,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 02:10:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:35,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 1562 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:10:35,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-07 02:10:37,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-07 02:10:39,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:39,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343730419] [2021-11-07 02:10:39,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343730419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:39,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [675221124] [2021-11-07 02:10:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:39,775 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:39,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:39,775 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:39,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 02:10:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:42,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 1562 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:10:42,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-07 02:10:42,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-07 02:10:43,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [675221124] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:43,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:10:43,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-07 02:10:43,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025373037] [2021-11-07 02:10:43,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:10:43,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:43,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:10:43,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:10:43,655 INFO L87 Difference]: Start difference. First operand 3954 states and 5574 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:58,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:58,512 INFO L93 Difference]: Finished difference Result 8542 states and 12191 transitions. [2021-11-07 02:10:58,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:10:58,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-07 02:10:58,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:58,519 INFO L225 Difference]: With dead ends: 8542 [2021-11-07 02:10:58,520 INFO L226 Difference]: Without dead ends: 4648 [2021-11-07 02:10:58,524 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:10:58,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4648 states. [2021-11-07 02:10:58,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4648 to 4638. [2021-11-07 02:10:58,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 4627 states have (on average 1.40933650313378) internal successors, (6521), 4637 states have internal predecessors, (6521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 6521 transitions. [2021-11-07 02:10:58,822 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 6521 transitions. Word has length 144 [2021-11-07 02:10:58,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:58,822 INFO L470 AbstractCegarLoop]: Abstraction has 4638 states and 6521 transitions. [2021-11-07 02:10:58,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:58,822 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 6521 transitions. [2021-11-07 02:10:58,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-07 02:10:58,827 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:58,827 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:58,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:59,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:59,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:59,239 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:10:59,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:59,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1549953492, now seen corresponding path program 1 times [2021-11-07 02:10:59,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:59,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607002506] [2021-11-07 02:10:59,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:59,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:59,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:59,242 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:59,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 02:11:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:02,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:11:02,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-07 02:11:04,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-07 02:11:06,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:06,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607002506] [2021-11-07 02:11:06,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607002506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:06,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [762747253] [2021-11-07 02:11:06,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:06,661 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:11:06,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:11:06,668 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:11:06,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 02:11:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:10,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:11:10,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-07 02:11:11,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-07 02:11:13,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [762747253] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:13,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767593130] [2021-11-07 02:11:13,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:13,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:11:13,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:11:13,045 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:11:13,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 02:11:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:15,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 02:11:15,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-07 02:11:19,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-07 02:11:23,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767593130] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:23,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:11:23,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [6, 6, 6, 6] total 22 [2021-11-07 02:11:23,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535681181] [2021-11-07 02:11:23,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:11:23,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:23,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:11:23,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:11:23,994 INFO L87 Difference]: Start difference. First operand 4638 states and 6521 transitions. Second operand has 14 states, 14 states have (on average 11.5) internal successors, (161), 14 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:02,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:02,142 INFO L93 Difference]: Finished difference Result 16378 states and 23240 transitions. [2021-11-07 02:12:02,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 02:12:02,143 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.5) internal successors, (161), 14 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-07 02:12:02,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:02,186 INFO L225 Difference]: With dead ends: 16378 [2021-11-07 02:12:02,186 INFO L226 Difference]: Without dead ends: 16362 [2021-11-07 02:12:02,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 899 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 02:12:02,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16362 states. [2021-11-07 02:12:02,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16362 to 5763. [2021-11-07 02:12:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5763 states, 5752 states have (on average 1.4104659248956886) internal successors, (8113), 5762 states have internal predecessors, (8113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5763 states to 5763 states and 8113 transitions. [2021-11-07 02:12:02,666 INFO L78 Accepts]: Start accepts. Automaton has 5763 states and 8113 transitions. Word has length 152 [2021-11-07 02:12:02,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:02,667 INFO L470 AbstractCegarLoop]: Abstraction has 5763 states and 8113 transitions. [2021-11-07 02:12:02,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.5) internal successors, (161), 14 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:02,667 INFO L276 IsEmpty]: Start isEmpty. Operand 5763 states and 8113 transitions. [2021-11-07 02:12:02,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-07 02:12:02,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:02,673 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:12:02,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:02,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:03,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-07 02:12:03,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:03,291 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:12:03,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:03,292 INFO L85 PathProgramCache]: Analyzing trace with hash -850177336, now seen corresponding path program 1 times [2021-11-07 02:12:03,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:03,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815927330] [2021-11-07 02:12:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:03,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:03,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:03,295 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:03,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 02:12:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:07,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:12:07,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-07 02:12:08,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-07 02:12:11,451 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:11,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815927330] [2021-11-07 02:12:11,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815927330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:11,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1253605993] [2021-11-07 02:12:11,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:11,452 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:12:11,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:12:11,453 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:12:11,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 02:12:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:15,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:12:15,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-07 02:12:16,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-07 02:12:18,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1253605993] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:18,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662173417] [2021-11-07 02:12:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:18,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:18,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:18,220 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:12:18,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 02:12:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:20,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 02:12:20,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-07 02:12:25,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-07 02:12:29,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662173417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:29,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:12:29,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 8, 8] total 22 [2021-11-07 02:12:29,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126059723] [2021-11-07 02:12:29,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 02:12:29,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:29,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 02:12:29,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:12:29,339 INFO L87 Difference]: Start difference. First operand 5763 states and 8113 transitions. Second operand has 22 states, 22 states have (on average 10.727272727272727) internal successors, (236), 22 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:23,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:23,854 INFO L93 Difference]: Finished difference Result 34337 states and 48837 transitions. [2021-11-07 02:13:23,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 02:13:23,855 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 10.727272727272727) internal successors, (236), 22 states have internal predecessors, (236), 0 states have call successors, (0), 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 153 [2021-11-07 02:13:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:23,914 INFO L225 Difference]: With dead ends: 34337 [2021-11-07 02:13:23,914 INFO L226 Difference]: Without dead ends: 28632 [2021-11-07 02:13:23,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 946 GetRequests, 905 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 02:13:23,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28632 states. [2021-11-07 02:13:24,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28632 to 6888. [2021-11-07 02:13:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6888 states, 6877 states have (on average 1.4109350007270611) internal successors, (9703), 6887 states have internal predecessors, (9703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:24,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6888 states to 6888 states and 9703 transitions. [2021-11-07 02:13:24,624 INFO L78 Accepts]: Start accepts. Automaton has 6888 states and 9703 transitions. Word has length 153 [2021-11-07 02:13:24,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:24,625 INFO L470 AbstractCegarLoop]: Abstraction has 6888 states and 9703 transitions. [2021-11-07 02:13:24,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.727272727272727) internal successors, (236), 22 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:24,625 INFO L276 IsEmpty]: Start isEmpty. Operand 6888 states and 9703 transitions. [2021-11-07 02:13:24,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-07 02:13:24,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:24,631 INFO L513 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:24,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:24,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:25,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-07 02:13:25,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:25,244 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:13:25,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:25,245 INFO L85 PathProgramCache]: Analyzing trace with hash -558224030, now seen corresponding path program 1 times [2021-11-07 02:13:25,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:25,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433132247] [2021-11-07 02:13:25,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:25,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:25,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:25,249 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:25,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 02:13:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:29,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:13:29,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-07 02:13:29,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-07 02:13:30,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:30,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433132247] [2021-11-07 02:13:30,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433132247] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:30,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:30,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:13:30,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817705106] [2021-11-07 02:13:30,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:13:30,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:30,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:13:30,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:13:30,508 INFO L87 Difference]: Start difference. First operand 6888 states and 9703 transitions. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:33,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:33,730 INFO L93 Difference]: Finished difference Result 19361 states and 26970 transitions. [2021-11-07 02:13:33,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:13:33,730 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 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 162 [2021-11-07 02:13:33,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:33,741 INFO L225 Difference]: With dead ends: 19361 [2021-11-07 02:13:33,741 INFO L226 Difference]: Without dead ends: 12538 [2021-11-07 02:13:33,747 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:13:33,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12538 states. [2021-11-07 02:13:34,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12538 to 6900. [2021-11-07 02:13:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 6889 states have (on average 1.4102191900130643) internal successors, (9715), 6899 states have internal predecessors, (9715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:34,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 9715 transitions. [2021-11-07 02:13:34,440 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 9715 transitions. Word has length 162 [2021-11-07 02:13:34,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:34,441 INFO L470 AbstractCegarLoop]: Abstraction has 6900 states and 9715 transitions. [2021-11-07 02:13:34,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:34,441 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 9715 transitions. [2021-11-07 02:13:34,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-07 02:13:34,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:34,446 INFO L513 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:34,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:34,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:34,660 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:13:34,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:34,661 INFO L85 PathProgramCache]: Analyzing trace with hash -430084204, now seen corresponding path program 1 times [2021-11-07 02:13:34,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:34,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257045309] [2021-11-07 02:13:34,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:34,663 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:34,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:34,663 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:34,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 02:13:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:38,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 02:13:38,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-07 02:13:43,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-07 02:13:46,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:46,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257045309] [2021-11-07 02:13:46,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257045309] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:46,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [542087440] [2021-11-07 02:13:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:46,533 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:46,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:46,534 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:46,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 02:13:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:51,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 02:13:51,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-07 02:13:54,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-07 02:13:56,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [542087440] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:56,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784550129] [2021-11-07 02:13:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:56,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:13:56,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:13:56,881 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:13:56,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 02:13:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:59,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 02:13:59,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-07 02:14:03,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-07 02:14:05,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784550129] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:05,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:14:05,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 8, 8] total 17 [2021-11-07 02:14:05,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639289699] [2021-11-07 02:14:05,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 02:14:05,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:05,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 02:14:05,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:14:05,325 INFO L87 Difference]: Start difference. First operand 6900 states and 9715 transitions. Second operand has 17 states, 17 states have (on average 10.176470588235293) internal successors, (173), 17 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:59,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:59,625 INFO L93 Difference]: Finished difference Result 20802 states and 29516 transitions. [2021-11-07 02:14:59,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 02:14:59,627 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 10.176470588235293) internal successors, (173), 17 states have internal predecessors, (173), 0 states have call successors, (0), 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 164 [2021-11-07 02:14:59,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:59,646 INFO L225 Difference]: With dead ends: 20802 [2021-11-07 02:14:59,646 INFO L226 Difference]: Without dead ends: 20786 [2021-11-07 02:14:59,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 971 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2021-11-07 02:14:59,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20786 states. [2021-11-07 02:15:00,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20786 to 8021. [2021-11-07 02:15:00,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8021 states, 8010 states have (on average 1.4108614232209737) internal successors, (11301), 8020 states have internal predecessors, (11301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:00,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8021 states to 8021 states and 11301 transitions. [2021-11-07 02:15:00,442 INFO L78 Accepts]: Start accepts. Automaton has 8021 states and 11301 transitions. Word has length 164 [2021-11-07 02:15:00,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:00,442 INFO L470 AbstractCegarLoop]: Abstraction has 8021 states and 11301 transitions. [2021-11-07 02:15:00,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.176470588235293) internal successors, (173), 17 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:00,443 INFO L276 IsEmpty]: Start isEmpty. Operand 8021 states and 11301 transitions. [2021-11-07 02:15:00,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-07 02:15:00,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:00,450 INFO L513 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:00,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:00,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-07 02:15:00,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-11-07 02:15:01,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:15:01,073 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:15:01,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:01,073 INFO L85 PathProgramCache]: Analyzing trace with hash -696154328, now seen corresponding path program 1 times [2021-11-07 02:15:01,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:01,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889601898] [2021-11-07 02:15:01,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:01,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:01,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:01,076 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:01,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 02:15:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:05,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 02:15:05,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-07 02:15:06,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-07 02:15:08,219 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:08,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889601898] [2021-11-07 02:15:08,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889601898] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:08,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:08,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-07 02:15:08,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671510696] [2021-11-07 02:15:08,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:15:08,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:08,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:15:08,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:15:08,221 INFO L87 Difference]: Start difference. First operand 8021 states and 11301 transitions. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:24,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:24,185 INFO L93 Difference]: Finished difference Result 53272 states and 73921 transitions. [2021-11-07 02:15:24,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 02:15:24,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 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 167 [2021-11-07 02:15:24,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:24,243 INFO L225 Difference]: With dead ends: 53272 [2021-11-07 02:15:24,243 INFO L226 Difference]: Without dead ends: 45316 [2021-11-07 02:15:24,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-11-07 02:15:24,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45316 states. [2021-11-07 02:15:25,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45316 to 8049. [2021-11-07 02:15:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8049 states, 8038 states have (on average 1.4094302065190345) internal successors, (11329), 8048 states have internal predecessors, (11329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8049 states to 8049 states and 11329 transitions. [2021-11-07 02:15:25,384 INFO L78 Accepts]: Start accepts. Automaton has 8049 states and 11329 transitions. Word has length 167 [2021-11-07 02:15:25,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:25,385 INFO L470 AbstractCegarLoop]: Abstraction has 8049 states and 11329 transitions. [2021-11-07 02:15:25,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:25,385 INFO L276 IsEmpty]: Start isEmpty. Operand 8049 states and 11329 transitions. [2021-11-07 02:15:25,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-07 02:15:25,392 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:25,392 INFO L513 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:25,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:25,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:25,608 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:15:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:25,609 INFO L85 PathProgramCache]: Analyzing trace with hash 664618212, now seen corresponding path program 1 times [2021-11-07 02:15:25,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:25,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536497157] [2021-11-07 02:15:25,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:25,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:25,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:25,612 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:25,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 02:15:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:30,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 1681 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:15:30,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-07 02:15:30,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-07 02:15:31,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:31,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536497157] [2021-11-07 02:15:31,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536497157] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:31,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:31,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:15:31,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965383945] [2021-11-07 02:15:31,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:15:31,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:31,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:15:31,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:15:31,300 INFO L87 Difference]: Start difference. First operand 8049 states and 11329 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:44,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:44,926 INFO L93 Difference]: Finished difference Result 16033 states and 22588 transitions. [2021-11-07 02:15:44,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:15:44,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 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 169 [2021-11-07 02:15:44,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:44,936 INFO L225 Difference]: With dead ends: 16033 [2021-11-07 02:15:44,936 INFO L226 Difference]: Without dead ends: 8049 [2021-11-07 02:15:44,943 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:15:44,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8049 states. [2021-11-07 02:15:45,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8049 to 8038. [2021-11-07 02:15:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8038 states, 8027 states have (on average 1.376977700261617) internal successors, (11053), 8037 states have internal predecessors, (11053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:45,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8038 states to 8038 states and 11053 transitions. [2021-11-07 02:15:45,850 INFO L78 Accepts]: Start accepts. Automaton has 8038 states and 11053 transitions. Word has length 169 [2021-11-07 02:15:45,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:45,851 INFO L470 AbstractCegarLoop]: Abstraction has 8038 states and 11053 transitions. [2021-11-07 02:15:45,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:45,852 INFO L276 IsEmpty]: Start isEmpty. Operand 8038 states and 11053 transitions. [2021-11-07 02:15:45,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-07 02:15:45,857 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:45,857 INFO L513 BasicCegarLoop]: trace histogram [8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:45,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:46,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:46,068 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:15:46,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:46,069 INFO L85 PathProgramCache]: Analyzing trace with hash 32738805, now seen corresponding path program 1 times [2021-11-07 02:15:46,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:46,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538234567] [2021-11-07 02:15:46,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:46,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:46,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:46,072 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:46,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 02:15:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:50,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 1564 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:15:50,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-07 02:15:51,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-07 02:15:52,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:52,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538234567] [2021-11-07 02:15:52,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538234567] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:52,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:52,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:15:52,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436180253] [2021-11-07 02:15:52,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:15:52,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:52,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:15:52,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:15:52,160 INFO L87 Difference]: Start difference. First operand 8038 states and 11053 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:07,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:07,830 INFO L93 Difference]: Finished difference Result 16011 states and 22036 transitions. [2021-11-07 02:16:07,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:16:07,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 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 170 [2021-11-07 02:16:07,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:07,839 INFO L225 Difference]: With dead ends: 16011 [2021-11-07 02:16:07,839 INFO L226 Difference]: Without dead ends: 8038 [2021-11-07 02:16:07,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:16:07,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8038 states. [2021-11-07 02:16:08,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8038 to 7502. [2021-11-07 02:16:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7491 states have (on average 1.3665732211987718) internal successors, (10237), 7501 states have internal predecessors, (10237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:08,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 10237 transitions. [2021-11-07 02:16:08,594 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 10237 transitions. Word has length 170 [2021-11-07 02:16:08,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:08,594 INFO L470 AbstractCegarLoop]: Abstraction has 7502 states and 10237 transitions. [2021-11-07 02:16:08,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:08,595 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 10237 transitions. [2021-11-07 02:16:08,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-07 02:16:08,601 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:08,601 INFO L513 BasicCegarLoop]: trace histogram [8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:08,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:08,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:08,823 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 02:16:08,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:08,823 INFO L85 PathProgramCache]: Analyzing trace with hash -437175597, now seen corresponding path program 1 times [2021-11-07 02:16:08,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:08,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630764093] [2021-11-07 02:16:08,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:08,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:08,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:08,826 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:08,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f609de7-3ba5-4843-a674-bce0ebb574d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-07 02:16:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:13,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 02:16:13,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:18,412 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-07 02:16:18,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-07 02:16:21,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:21,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630764093] [2021-11-07 02:16:21,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630764093] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:21,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:21,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 15 [2021-11-07 02:16:21,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494381296] [2021-11-07 02:16:21,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 02:16:21,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:21,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 02:16:21,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:16:21,899 INFO L87 Difference]: Start difference. First operand 7502 states and 10237 transitions. Second operand has 15 states, 15 states have (on average 11.266666666666667) internal successors, (169), 15 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)