./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.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_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/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_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/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_a9b10710-6af2-4d7e-9594-4072ec102f46/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 00358a78c5c5addd9e5a7ab9d5fbe39a67a857ec32575d905ee2c6c7ab2b30b6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:09:06,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:09:06,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:09:06,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:09:06,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:09:06,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:09:06,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:09:06,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:09:06,515 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:09:06,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:09:06,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:09:06,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:09:06,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:09:06,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:09:06,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:09:06,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:09:06,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:09:06,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:09:06,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:09:06,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:09:06,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:09:06,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:09:06,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:09:06,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:09:06,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:09:06,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:09:06,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:09:06,569 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:09:06,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:09:06,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:09:06,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:09:06,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:09:06,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:09:06,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:09:06,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:09:06,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:09:06,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:09:06,592 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:09:06,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:09:06,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:09:06,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:09:06,596 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 02:09:06,648 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:09:06,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:09:06,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:09:06,650 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:09:06,651 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:09:06,651 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:09:06,651 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:09:06,659 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:09:06,660 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:09:06,660 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:09:06,661 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:09:06,662 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:09:06,662 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:09:06,662 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:09:06,662 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:09:06,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:09:06,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:09:06,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:09:06,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:09:06,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:09:06,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:09:06,665 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:09:06,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:09:06,666 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:09:06,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:09:06,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:09:06,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:09:06,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:09:06,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:09:06,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:09:06,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:09:06,670 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:09:06,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:09:06,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:09:06,671 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:09:06,671 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:09:06,671 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_a9b10710-6af2-4d7e-9594-4072ec102f46/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00358a78c5c5addd9e5a7ab9d5fbe39a67a857ec32575d905ee2c6c7ab2b30b6 [2021-11-07 02:09:07,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:09:07,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:09:07,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:09:07,057 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:09:07,058 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:09:07,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.cil.out.i [2021-11-07 02:09:07,149 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/data/8d41608d5/51cf64b64791496fbddf908417cd449c/FLAG068591ae2 [2021-11-07 02:09:08,304 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:09:08,307 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.cil.out.i [2021-11-07 02:09:08,378 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/data/8d41608d5/51cf64b64791496fbddf908417cd449c/FLAG068591ae2 [2021-11-07 02:09:08,662 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/data/8d41608d5/51cf64b64791496fbddf908417cd449c [2021-11-07 02:09:08,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:09:08,669 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:09:08,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:09:08,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:09:08,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:09:08,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:08" (1/1) ... [2021-11-07 02:09:08,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3978c8f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:08, skipping insertion in model container [2021-11-07 02:09:08,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:08" (1/1) ... [2021-11-07 02:09:08,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:09:08,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:09:10,485 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:10,681 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:10,690 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:10,711 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:10,782 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:10,800 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:10,807 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:10,808 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:10,820 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:10,830 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:10,831 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:10,878 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:10,908 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:10,916 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:10,942 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:10,974 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:10,993 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:11,051 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:11,161 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:11,178 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:11,205 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:11,232 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:11,239 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:11,253 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:11,280 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:11,303 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:11,303 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:11,304 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:09:11,332 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_a9b10710-6af2-4d7e-9594-4072ec102f46/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.cil.out.i[218619,218632] [2021-11-07 02:09:11,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:09:11,628 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 02:09:11,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@10f56f44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:11, skipping insertion in model container [2021-11-07 02:09:11,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:09:11,630 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:09:11,633 INFO L168 Benchmark]: Toolchain (without parser) took 2961.87 ms. Allocated memory was 109.1 MB in the beginning and 146.8 MB in the end (delta: 37.7 MB). Free memory was 65.0 MB in the beginning and 93.6 MB in the end (delta: -28.6 MB). Peak memory consumption was 41.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:09:11,633 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 109.1 MB. Free memory is still 63.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:09:11,635 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2956.07 ms. Allocated memory was 109.1 MB in the beginning and 146.8 MB in the end (delta: 37.7 MB). Free memory was 65.0 MB in the beginning and 93.6 MB in the end (delta: -28.6 MB). Peak memory consumption was 41.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:09:11,637 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 109.1 MB. Free memory is still 63.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2956.07 ms. Allocated memory was 109.1 MB in the beginning and 146.8 MB in the end (delta: 37.7 MB). Free memory was 65.0 MB in the beginning and 93.6 MB in the end (delta: -28.6 MB). Peak memory consumption was 41.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5067]: 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_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/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_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/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_a9b10710-6af2-4d7e-9594-4072ec102f46/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 00358a78c5c5addd9e5a7ab9d5fbe39a67a857ec32575d905ee2c6c7ab2b30b6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:09:14,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:09:14,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:09:14,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:09:14,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:09:14,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:09:14,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:09:14,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:09:14,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:09:14,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:09:14,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:09:14,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:09:14,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:09:14,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:09:14,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:09:14,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:09:14,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:09:14,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:09:14,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:09:14,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:09:14,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:09:14,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:09:14,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:09:14,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:09:14,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:09:14,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:09:14,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:09:14,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:09:14,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:09:14,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:09:14,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:09:14,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:09:14,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:09:14,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:09:14,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:09:14,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:09:14,857 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:09:14,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:09:14,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:09:14,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:09:14,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:09:14,863 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 02:09:14,921 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:09:14,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:09:14,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:09:14,924 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:09:14,924 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:09:14,925 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:09:14,925 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:09:14,925 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:09:14,926 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:09:14,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:09:14,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:09:14,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:09:14,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:09:14,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:09:14,931 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:09:14,931 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:09:14,931 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:09:14,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:09:14,932 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:09:14,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:09:14,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:09:14,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:09:14,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:09:14,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:09:14,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:09:14,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:09:14,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:09:14,935 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:09:14,935 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:14,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:09:14,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:09:14,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:09:14,936 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_a9b10710-6af2-4d7e-9594-4072ec102f46/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00358a78c5c5addd9e5a7ab9d5fbe39a67a857ec32575d905ee2c6c7ab2b30b6 [2021-11-07 02:09:15,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:09:15,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:09:15,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:09:15,553 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:09:15,554 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:09:15,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.cil.out.i [2021-11-07 02:09:15,656 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/data/507247bd4/8dcdafc40df4407ab003944d72806e12/FLAGc240897ab [2021-11-07 02:09:17,015 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:09:17,018 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.cil.out.i [2021-11-07 02:09:17,092 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/data/507247bd4/8dcdafc40df4407ab003944d72806e12/FLAGc240897ab [2021-11-07 02:09:17,282 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/data/507247bd4/8dcdafc40df4407ab003944d72806e12 [2021-11-07 02:09:17,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:09:17,289 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:09:17,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:09:17,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:09:17,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:09:17,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:17" (1/1) ... [2021-11-07 02:09:17,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a00ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:17, skipping insertion in model container [2021-11-07 02:09:17,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:17" (1/1) ... [2021-11-07 02:09:17,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:09:17,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:09:19,856 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_a9b10710-6af2-4d7e-9594-4072ec102f46/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.cil.out.i[218619,218632] [2021-11-07 02:09:20,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:09:20,162 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:09:20,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:09:20,640 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_a9b10710-6af2-4d7e-9594-4072ec102f46/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.cil.out.i[218619,218632] [2021-11-07 02:09:20,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:09:20,680 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:09:21,222 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_a9b10710-6af2-4d7e-9594-4072ec102f46/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.cil.out.i[218619,218632] [2021-11-07 02:09:21,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:09:21,426 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:09:21,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21 WrapperNode [2021-11-07 02:09:21,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:09:21,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:09:21,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:09:21,429 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:09:21,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:21,537 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:22,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:09:22,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:09:22,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:09:22,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:09:22,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:22,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:22,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:22,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:23,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:23,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:23,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:23,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:09:23,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:09:23,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:09:23,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:09:23,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (1/1) ... [2021-11-07 02:09:23,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:09:23,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:23,561 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:09:23,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:09:23,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:09:23,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 02:09:23,631 INFO L130 BoogieDeclarations]: Found specification of procedure uas_zap_pending [2021-11-07 02:09:23,632 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_zap_pending [2021-11-07 02:09:23,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:09:23,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 02:09:23,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 02:09:23,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 02:09:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:09:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:09:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 02:09:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 02:09:23,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 02:09:23,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:09:23,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:09:23,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:09:23,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 02:09:23,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:09:23,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 02:09:23,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 02:09:23,635 INFO L130 BoogieDeclarations]: Found specification of procedure uas_try_complete [2021-11-07 02:09:23,635 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_try_complete [2021-11-07 02:09:23,636 INFO L130 BoogieDeclarations]: Found specification of procedure uas_data_cmplt [2021-11-07 02:09:23,636 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_data_cmplt [2021-11-07 02:09:23,636 INFO L130 BoogieDeclarations]: Found specification of procedure uas_disconnect [2021-11-07 02:09:23,636 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_disconnect [2021-11-07 02:09:23,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 02:09:23,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 02:09:23,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 02:09:23,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 02:09:23,637 INFO L130 BoogieDeclarations]: Found specification of procedure uas_stat_cmplt [2021-11-07 02:09:23,638 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_stat_cmplt [2021-11-07 02:09:23,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:09:23,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:09:23,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 02:09:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 02:09:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 02:09:23,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 02:09:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 02:09:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 02:09:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:09:23,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:12:24,304 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:12:24,305 INFO L299 CfgBuilder]: Removed 2604 assume(true) statements. [2021-11-07 02:12:24,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:12:24 BoogieIcfgContainer [2021-11-07 02:12:24,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:12:24,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:12:24,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:12:24,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:12:24,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:09:17" (1/3) ... [2021-11-07 02:12:24,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3366ccf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:12:24, skipping insertion in model container [2021-11-07 02:12:24,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:21" (2/3) ... [2021-11-07 02:12:24,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3366ccf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:12:24, skipping insertion in model container [2021-11-07 02:12:24,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:12:24" (3/3) ... [2021-11-07 02:12:24,324 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.cil.out.i [2021-11-07 02:12:24,331 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:12:24,332 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 02:12:24,417 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:12:24,425 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 02:12:24,426 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 02:12:24,527 INFO L276 IsEmpty]: Start isEmpty. Operand has 4099 states, 4072 states have (on average 1.4211689587426326) internal successors, (5787), 4081 states have internal predecessors, (5787), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 02:12:24,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 02:12:24,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:24,536 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] [2021-11-07 02:12:24,537 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:12:24,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:24,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1748794963, now seen corresponding path program 1 times [2021-11-07 02:12:24,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:24,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342856846] [2021-11-07 02:12:24,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:24,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:24,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:24,572 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:24,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:12:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:27,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:12:27,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:27,685 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 02:12:27,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:27,872 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 02:12:27,873 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:27,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342856846] [2021-11-07 02:12:27,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342856846] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:27,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:27,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:12:27,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076505014] [2021-11-07 02:12:27,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:12:27,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:27,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:12:27,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:12:27,918 INFO L87 Difference]: Start difference. First operand has 4099 states, 4072 states have (on average 1.4211689587426326) internal successors, (5787), 4081 states have internal predecessors, (5787), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:28,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:28,200 INFO L93 Difference]: Finished difference Result 8194 states and 11639 transitions. [2021-11-07 02:12:28,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:12:28,202 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 02:12:28,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:28,250 INFO L225 Difference]: With dead ends: 8194 [2021-11-07 02:12:28,250 INFO L226 Difference]: Without dead ends: 4089 [2021-11-07 02:12:28,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 56 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 02:12:28,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-11-07 02:12:28,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 4089. [2021-11-07 02:12:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4089 states, 4063 states have (on average 1.3972434161949299) internal successors, (5677), 4071 states have internal predecessors, (5677), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 02:12:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4089 states to 4089 states and 5705 transitions. [2021-11-07 02:12:28,577 INFO L78 Accepts]: Start accepts. Automaton has 4089 states and 5705 transitions. Word has length 29 [2021-11-07 02:12:28,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:28,578 INFO L470 AbstractCegarLoop]: Abstraction has 4089 states and 5705 transitions. [2021-11-07 02:12:28,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:28,578 INFO L276 IsEmpty]: Start isEmpty. Operand 4089 states and 5705 transitions. [2021-11-07 02:12:28,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 02:12:28,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:28,582 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] [2021-11-07 02:12:28,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:28,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:28,810 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:12:28,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:28,811 INFO L85 PathProgramCache]: Analyzing trace with hash 614067241, now seen corresponding path program 1 times [2021-11-07 02:12:28,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:28,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881201693] [2021-11-07 02:12:28,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:28,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:28,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:28,817 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:28,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:12:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:31,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:12:31,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:31,642 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 02:12:31,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:31,770 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 02:12:31,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:31,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881201693] [2021-11-07 02:12:31,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881201693] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:31,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:31,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:12:31,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210789378] [2021-11-07 02:12:31,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:12:31,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:31,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:12:31,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:12:31,773 INFO L87 Difference]: Start difference. First operand 4089 states and 5705 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 02:12:34,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:34,264 INFO L93 Difference]: Finished difference Result 8168 states and 11405 transitions. [2021-11-07 02:12:34,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:12:34,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 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 29 [2021-11-07 02:12:34,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:34,297 INFO L225 Difference]: With dead ends: 8168 [2021-11-07 02:12:34,297 INFO L226 Difference]: Without dead ends: 4095 [2021-11-07 02:12:34,310 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 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 02:12:34,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4095 states. [2021-11-07 02:12:34,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4095 to 4095. [2021-11-07 02:12:34,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4095 states, 4069 states have (on average 1.3966576554435979) internal successors, (5683), 4077 states have internal predecessors, (5683), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 02:12:34,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4095 states to 4095 states and 5711 transitions. [2021-11-07 02:12:34,477 INFO L78 Accepts]: Start accepts. Automaton has 4095 states and 5711 transitions. Word has length 29 [2021-11-07 02:12:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:34,478 INFO L470 AbstractCegarLoop]: Abstraction has 4095 states and 5711 transitions. [2021-11-07 02:12:34,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 02:12:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4095 states and 5711 transitions. [2021-11-07 02:12:34,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 02:12:34,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:34,487 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:12:34,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 02:12:34,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:34,704 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:12:34,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:34,704 INFO L85 PathProgramCache]: Analyzing trace with hash -693705591, now seen corresponding path program 1 times [2021-11-07 02:12:34,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:34,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507923314] [2021-11-07 02:12:34,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:34,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:34,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:34,712 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:34,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:12:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:37,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 1423 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:12:37,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:37,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:37,827 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:37,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507923314] [2021-11-07 02:12:37,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507923314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:37,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1957635486] [2021-11-07 02:12:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:37,829 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:12:37,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:12:37,831 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:12:37,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 02:12:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:39,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 1423 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:12:39,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:12:39,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:12:39,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1957635486] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:39,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:12:39,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 02:12:39,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945391478] [2021-11-07 02:12:39,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:12:39,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:39,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:12:39,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:12:39,963 INFO L87 Difference]: Start difference. First operand 4095 states and 5711 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 02:12:40,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:40,097 INFO L93 Difference]: Finished difference Result 4095 states and 5711 transitions. [2021-11-07 02:12:40,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:12:40,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-07 02:12:40,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:40,123 INFO L225 Difference]: With dead ends: 4095 [2021-11-07 02:12:40,123 INFO L226 Difference]: Without dead ends: 4093 [2021-11-07 02:12:40,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:12:40,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4093 states. [2021-11-07 02:12:40,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4093 to 4093. [2021-11-07 02:12:40,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4068 states have (on average 1.3965093411996068) internal successors, (5681), 4075 states have internal predecessors, (5681), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 02:12:40,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 5709 transitions. [2021-11-07 02:12:40,282 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 5709 transitions. Word has length 31 [2021-11-07 02:12:40,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:40,283 INFO L470 AbstractCegarLoop]: Abstraction has 4093 states and 5709 transitions. [2021-11-07 02:12:40,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 02:12:40,283 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 5709 transitions. [2021-11-07 02:12:40,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 02:12:40,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:40,286 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:12:40,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:40,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:40,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:12:40,710 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:12:40,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:40,711 INFO L85 PathProgramCache]: Analyzing trace with hash -30017414, now seen corresponding path program 1 times [2021-11-07 02:12:40,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:40,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129750946] [2021-11-07 02:12:40,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:40,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:40,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:40,718 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:40,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:12:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:43,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 1424 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:12:43,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:43,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:43,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:43,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129750946] [2021-11-07 02:12:43,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129750946] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:43,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1389642677] [2021-11-07 02:12:43,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:43,724 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:12:43,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:12:43,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:12:43,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-07 02:12:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:45,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 1424 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:12:45,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:12:45,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:12:45,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1389642677] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:45,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:12:45,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 02:12:45,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404153048] [2021-11-07 02:12:45,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:12:45,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:45,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:12:45,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:12:45,942 INFO L87 Difference]: Start difference. First operand 4093 states and 5709 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 02:12:46,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:46,210 INFO L93 Difference]: Finished difference Result 4093 states and 5709 transitions. [2021-11-07 02:12:46,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:12:46,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 02:12:46,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:46,241 INFO L225 Difference]: With dead ends: 4093 [2021-11-07 02:12:46,242 INFO L226 Difference]: Without dead ends: 4091 [2021-11-07 02:12:46,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:12:46,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4091 states. [2021-11-07 02:12:46,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4091 to 4091. [2021-11-07 02:12:46,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4091 states, 4067 states have (on average 1.3963609540201622) internal successors, (5679), 4073 states have internal predecessors, (5679), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 02:12:46,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4091 states to 4091 states and 5707 transitions. [2021-11-07 02:12:46,438 INFO L78 Accepts]: Start accepts. Automaton has 4091 states and 5707 transitions. Word has length 32 [2021-11-07 02:12:46,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:46,439 INFO L470 AbstractCegarLoop]: Abstraction has 4091 states and 5707 transitions. [2021-11-07 02:12:46,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 02:12:46,439 INFO L276 IsEmpty]: Start isEmpty. Operand 4091 states and 5707 transitions. [2021-11-07 02:12:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 02:12:46,445 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:46,446 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:12:46,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:46,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 02:12:46,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:46,859 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:12:46,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:46,859 INFO L85 PathProgramCache]: Analyzing trace with hash -930520397, now seen corresponding path program 1 times [2021-11-07 02:12:46,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:46,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85623669] [2021-11-07 02:12:46,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:46,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:46,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:46,863 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:46,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:12:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:49,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 1425 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:12:49,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:49,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:50,168 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:50,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85623669] [2021-11-07 02:12:50,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85623669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:50,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1415982645] [2021-11-07 02:12:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:50,169 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:12:50,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:12:50,195 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:12:50,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 02:12:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:51,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 1425 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:12:51,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:12:52,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:12:52,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1415982645] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:52,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:12:52,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 02:12:52,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510294024] [2021-11-07 02:12:52,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:12:52,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:52,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:12:52,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:12:52,426 INFO L87 Difference]: Start difference. First operand 4091 states and 5707 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 02:12:52,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:52,584 INFO L93 Difference]: Finished difference Result 4091 states and 5707 transitions. [2021-11-07 02:12:52,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:12:52,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 02:12:52,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:52,615 INFO L225 Difference]: With dead ends: 4091 [2021-11-07 02:12:52,615 INFO L226 Difference]: Without dead ends: 4089 [2021-11-07 02:12:52,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:12:52,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-11-07 02:12:52,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 4089. [2021-11-07 02:12:52,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4089 states, 4066 states have (on average 1.396212493851451) internal successors, (5677), 4071 states have internal predecessors, (5677), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 02:12:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4089 states to 4089 states and 5705 transitions. [2021-11-07 02:12:52,798 INFO L78 Accepts]: Start accepts. Automaton has 4089 states and 5705 transitions. Word has length 33 [2021-11-07 02:12:52,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:52,799 INFO L470 AbstractCegarLoop]: Abstraction has 4089 states and 5705 transitions. [2021-11-07 02:12:52,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 02:12:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand 4089 states and 5705 transitions. [2021-11-07 02:12:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 02:12:52,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:52,800 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:12:52,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:53,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:53,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:53,219 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:12:53,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:53,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1218658212, now seen corresponding path program 1 times [2021-11-07 02:12:53,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:53,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087033135] [2021-11-07 02:12:53,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:53,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:53,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:53,224 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:53,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:12:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:55,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:12:55,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:55,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:56,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:56,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087033135] [2021-11-07 02:12:56,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087033135] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:56,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1313654266] [2021-11-07 02:12:56,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:56,343 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:12:56,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:12:56,344 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:12:56,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 02:12:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:58,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:12:58,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:12:58,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:12:58,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1313654266] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:58,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:12:58,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 02:12:58,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586152338] [2021-11-07 02:12:58,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:12:58,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:58,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:12:58,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:12:58,659 INFO L87 Difference]: Start difference. First operand 4089 states and 5705 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 02:12:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:59,028 INFO L93 Difference]: Finished difference Result 12217 states and 17064 transitions. [2021-11-07 02:12:59,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:12:59,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 34 [2021-11-07 02:12:59,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:59,101 INFO L225 Difference]: With dead ends: 12217 [2021-11-07 02:12:59,101 INFO L226 Difference]: Without dead ends: 8143 [2021-11-07 02:12:59,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:12:59,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8143 states. [2021-11-07 02:12:59,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8143 to 8141. [2021-11-07 02:12:59,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8141 states, 8098 states have (on average 1.3971350950852062) internal successors, (11314), 8106 states have internal predecessors, (11314), 28 states have call successors, (28), 12 states have call predecessors, (28), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-07 02:12:59,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8141 states to 8141 states and 11370 transitions. [2021-11-07 02:12:59,457 INFO L78 Accepts]: Start accepts. Automaton has 8141 states and 11370 transitions. Word has length 34 [2021-11-07 02:12:59,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:59,458 INFO L470 AbstractCegarLoop]: Abstraction has 8141 states and 11370 transitions. [2021-11-07 02:12:59,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 02:12:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 8141 states and 11370 transitions. [2021-11-07 02:12:59,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:12:59,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:59,464 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:12:59,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:59,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:59,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:12:59,886 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:12:59,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:59,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1446473065, now seen corresponding path program 1 times [2021-11-07 02:12:59,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:59,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872991298] [2021-11-07 02:12:59,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:59,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:59,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:59,889 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:59,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:13:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:02,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:13:02,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:13:02,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:03,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:13:03,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:03,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872991298] [2021-11-07 02:13:03,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872991298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:03,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [810131523] [2021-11-07 02:13:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:03,045 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:03,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:03,048 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:03,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 02:13:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:04,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:13:04,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:13:04,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:13:05,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [810131523] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:05,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:13:05,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:13:05,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154476900] [2021-11-07 02:13:05,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:13:05,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:05,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:13:05,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:13:05,108 INFO L87 Difference]: Start difference. First operand 8141 states and 11370 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:06,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:06,093 INFO L93 Difference]: Finished difference Result 23522 states and 32897 transitions. [2021-11-07 02:13:06,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:13:06,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 02:13:06,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:06,179 INFO L225 Difference]: With dead ends: 23522 [2021-11-07 02:13:06,179 INFO L226 Difference]: Without dead ends: 15402 [2021-11-07 02:13:06,201 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:13:06,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15402 states. [2021-11-07 02:13:06,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15402 to 13021. [2021-11-07 02:13:06,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13021 states, 12978 states have (on average 1.3969795037756203) internal successors, (18130), 12986 states have internal predecessors, (18130), 28 states have call successors, (28), 12 states have call predecessors, (28), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-07 02:13:06,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13021 states to 13021 states and 18186 transitions. [2021-11-07 02:13:06,844 INFO L78 Accepts]: Start accepts. Automaton has 13021 states and 18186 transitions. Word has length 54 [2021-11-07 02:13:06,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:06,845 INFO L470 AbstractCegarLoop]: Abstraction has 13021 states and 18186 transitions. [2021-11-07 02:13:06,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:06,845 INFO L276 IsEmpty]: Start isEmpty. Operand 13021 states and 18186 transitions. [2021-11-07 02:13:06,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 02:13:06,862 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:06,862 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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 02:13:06,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:07,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:07,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:07,278 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:13:07,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:07,278 INFO L85 PathProgramCache]: Analyzing trace with hash -937096246, now seen corresponding path program 1 times [2021-11-07 02:13:07,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:07,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916209334] [2021-11-07 02:13:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:07,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:07,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:07,283 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:07,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:13:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:10,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1696 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:13:10,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:10,797 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 02:13:10,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:11,456 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 02:13:11,456 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:11,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916209334] [2021-11-07 02:13:11,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916209334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:11,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [373957238] [2021-11-07 02:13:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:11,457 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:11,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:11,458 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:11,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 02:13:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:13,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 1696 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:13:13,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:13:13,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:13:13,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [373957238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:13,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:13:13,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:13:13,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749974059] [2021-11-07 02:13:13,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:13:13,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:13,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:13:13,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:13:13,872 INFO L87 Difference]: Start difference. First operand 13021 states and 18186 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 02:13:14,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:14,852 INFO L93 Difference]: Finished difference Result 33524 states and 46871 transitions. [2021-11-07 02:13:14,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:13:14,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 02:13:14,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:15,101 INFO L225 Difference]: With dead ends: 33524 [2021-11-07 02:13:15,101 INFO L226 Difference]: Without dead ends: 20524 [2021-11-07 02:13:15,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:13:15,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20524 states. [2021-11-07 02:13:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20524 to 20502. [2021-11-07 02:13:15,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20502 states, 20423 states have (on average 1.3994026342848749) internal successors, (28580), 20438 states have internal predecessors, (28580), 52 states have call successors, (52), 24 states have call predecessors, (52), 24 states have return successors, (52), 43 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-07 02:13:15,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20502 states to 20502 states and 28684 transitions. [2021-11-07 02:13:15,769 INFO L78 Accepts]: Start accepts. Automaton has 20502 states and 28684 transitions. Word has length 94 [2021-11-07 02:13:15,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:15,770 INFO L470 AbstractCegarLoop]: Abstraction has 20502 states and 28684 transitions. [2021-11-07 02:13:15,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 02:13:15,770 INFO L276 IsEmpty]: Start isEmpty. Operand 20502 states and 28684 transitions. [2021-11-07 02:13:15,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 02:13:15,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:15,786 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:13:15,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:16,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:16,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:16,204 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:13:16,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:16,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1061338272, now seen corresponding path program 1 times [2021-11-07 02:13:16,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:16,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943397076] [2021-11-07 02:13:16,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:16,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:16,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:16,210 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:16,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:13:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:18,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 1770 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:13:18,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:13:19,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:13:20,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:20,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943397076] [2021-11-07 02:13:20,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943397076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:20,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [593918319] [2021-11-07 02:13:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:20,069 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:20,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:20,070 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:20,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 02:13:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:21,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 1770 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:13:21,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:13:22,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:13:22,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [593918319] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:22,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:13:22,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:13:22,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185644875] [2021-11-07 02:13:22,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:13:22,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:22,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:13:22,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:13:22,694 INFO L87 Difference]: Start difference. First operand 20502 states and 28684 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 02:13:25,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:25,842 INFO L93 Difference]: Finished difference Result 56048 states and 78420 transitions. [2021-11-07 02:13:25,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:13:25,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 111 [2021-11-07 02:13:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:25,974 INFO L225 Difference]: With dead ends: 56048 [2021-11-07 02:13:25,974 INFO L226 Difference]: Without dead ends: 35567 [2021-11-07 02:13:26,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:13:26,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35567 states. [2021-11-07 02:13:27,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35567 to 20514. [2021-11-07 02:13:27,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20514 states, 20435 states have (on average 1.3991680939564473) internal successors, (28592), 20450 states have internal predecessors, (28592), 52 states have call successors, (52), 24 states have call predecessors, (52), 24 states have return successors, (52), 43 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-07 02:13:27,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20514 states to 20514 states and 28696 transitions. [2021-11-07 02:13:27,098 INFO L78 Accepts]: Start accepts. Automaton has 20514 states and 28696 transitions. Word has length 111 [2021-11-07 02:13:27,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:27,098 INFO L470 AbstractCegarLoop]: Abstraction has 20514 states and 28696 transitions. [2021-11-07 02:13:27,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 02:13:27,099 INFO L276 IsEmpty]: Start isEmpty. Operand 20514 states and 28696 transitions. [2021-11-07 02:13:27,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 02:13:27,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:27,119 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:13:27,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:27,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:27,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:27,534 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:13:27,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:27,535 INFO L85 PathProgramCache]: Analyzing trace with hash 2050635555, now seen corresponding path program 1 times [2021-11-07 02:13:27,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:27,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439434335] [2021-11-07 02:13:27,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:27,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:27,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:27,541 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:27,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:13:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:30,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 1766 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:13:30,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:13:30,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:13:31,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:31,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439434335] [2021-11-07 02:13:31,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439434335] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:31,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1295478731] [2021-11-07 02:13:31,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:31,683 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:31,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:31,684 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:31,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 02:13:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:33,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 1766 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:13:33,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:13:34,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:13:34,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1295478731] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:34,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:13:34,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:13:34,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567039896] [2021-11-07 02:13:34,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:13:34,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:34,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:13:34,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:13:34,397 INFO L87 Difference]: Start difference. First operand 20514 states and 28696 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 02:13:36,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:36,202 INFO L93 Difference]: Finished difference Result 71117 states and 99494 transitions. [2021-11-07 02:13:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:13:36,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 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 111 [2021-11-07 02:13:36,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:36,345 INFO L225 Difference]: With dead ends: 71117 [2021-11-07 02:13:36,346 INFO L226 Difference]: Without dead ends: 50624 [2021-11-07 02:13:36,386 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:13:36,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50624 states. [2021-11-07 02:13:37,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50624 to 20522. [2021-11-07 02:13:37,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20522 states, 20443 states have (on average 1.399011886709387) internal successors, (28600), 20458 states have internal predecessors, (28600), 52 states have call successors, (52), 24 states have call predecessors, (52), 24 states have return successors, (52), 43 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-07 02:13:37,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20522 states to 20522 states and 28704 transitions. [2021-11-07 02:13:37,755 INFO L78 Accepts]: Start accepts. Automaton has 20522 states and 28704 transitions. Word has length 111 [2021-11-07 02:13:37,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:37,755 INFO L470 AbstractCegarLoop]: Abstraction has 20522 states and 28704 transitions. [2021-11-07 02:13:37,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 02:13:37,756 INFO L276 IsEmpty]: Start isEmpty. Operand 20522 states and 28704 transitions. [2021-11-07 02:13:37,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-07 02:13:37,771 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:37,771 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:37,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:38,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 02:13:38,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:38,187 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:13:38,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:38,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1611879561, now seen corresponding path program 1 times [2021-11-07 02:13:38,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:38,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280337064] [2021-11-07 02:13:38,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:38,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:38,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:38,190 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:38,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:13:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:41,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:13:41,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:13:42,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:13:42,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:42,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280337064] [2021-11-07 02:13:42,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280337064] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:42,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [86709853] [2021-11-07 02:13:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:42,971 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:42,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:42,971 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:42,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:13:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:45,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:13:45,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:13:46,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:13:47,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [86709853] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:47,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:13:47,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 02:13:47,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374921048] [2021-11-07 02:13:47,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:13:47,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:47,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:13:47,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:13:47,167 INFO L87 Difference]: Start difference. First operand 20522 states and 28704 transitions. Second operand has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 02:13:56,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:56,250 INFO L93 Difference]: Finished difference Result 162371 states and 227298 transitions. [2021-11-07 02:13:56,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:13:56,252 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-11-07 02:13:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:56,601 INFO L225 Difference]: With dead ends: 162371 [2021-11-07 02:13:56,601 INFO L226 Difference]: Without dead ends: 141870 [2021-11-07 02:13:56,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-11-07 02:13:56,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141870 states. [2021-11-07 02:13:59,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141870 to 20538. [2021-11-07 02:13:59,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20538 states, 20459 states have (on average 1.398699838701794) internal successors, (28616), 20474 states have internal predecessors, (28616), 52 states have call successors, (52), 24 states have call predecessors, (52), 24 states have return successors, (52), 43 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-07 02:13:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20538 states to 20538 states and 28720 transitions. [2021-11-07 02:13:59,993 INFO L78 Accepts]: Start accepts. Automaton has 20538 states and 28720 transitions. Word has length 130 [2021-11-07 02:13:59,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:59,994 INFO L470 AbstractCegarLoop]: Abstraction has 20538 states and 28720 transitions. [2021-11-07 02:13:59,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 02:13:59,994 INFO L276 IsEmpty]: Start isEmpty. Operand 20538 states and 28720 transitions. [2021-11-07 02:14:00,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-07 02:14:00,013 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:00,014 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:00,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:00,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:00,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:00,430 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:14:00,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:00,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1803974213, now seen corresponding path program 1 times [2021-11-07 02:14:00,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:00,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949705848] [2021-11-07 02:14:00,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:00,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:00,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:00,436 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:00,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:14:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:04,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:14:04,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:14:04,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:14:05,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:05,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949705848] [2021-11-07 02:14:05,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949705848] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:05,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [400538144] [2021-11-07 02:14:05,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:05,601 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:05,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:14:05,605 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:14:05,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 02:14:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:08,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:14:08,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:14:08,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:14:09,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [400538144] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:09,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:14:09,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 02:14:09,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34909807] [2021-11-07 02:14:09,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:14:09,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:09,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:14:09,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:14:09,019 INFO L87 Difference]: Start difference. First operand 20538 states and 28720 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 02:14:14,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:14,975 INFO L93 Difference]: Finished difference Result 86918 states and 121632 transitions. [2021-11-07 02:14:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:14:14,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 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 138 [2021-11-07 02:14:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:15,107 INFO L225 Difference]: With dead ends: 86918 [2021-11-07 02:14:15,107 INFO L226 Difference]: Without dead ends: 66401 [2021-11-07 02:14:15,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:14:15,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66401 states. [2021-11-07 02:14:17,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66401 to 20562. [2021-11-07 02:14:17,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20562 states, 20483 states have (on average 1.3982326807596543) internal successors, (28640), 20498 states have internal predecessors, (28640), 52 states have call successors, (52), 24 states have call predecessors, (52), 24 states have return successors, (52), 43 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-07 02:14:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20562 states to 20562 states and 28744 transitions. [2021-11-07 02:14:17,406 INFO L78 Accepts]: Start accepts. Automaton has 20562 states and 28744 transitions. Word has length 138 [2021-11-07 02:14:17,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:17,406 INFO L470 AbstractCegarLoop]: Abstraction has 20562 states and 28744 transitions. [2021-11-07 02:14:17,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 02:14:17,406 INFO L276 IsEmpty]: Start isEmpty. Operand 20562 states and 28744 transitions. [2021-11-07 02:14:17,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-07 02:14:17,418 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:17,418 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:17,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:17,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:17,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:17,819 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:14:17,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:17,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1930293305, now seen corresponding path program 1 times [2021-11-07 02:14:17,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:17,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943883024] [2021-11-07 02:14:17,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:17,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:17,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:17,823 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:17,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:14:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:21,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1854 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:14:21,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:14:21,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:14:22,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:22,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943883024] [2021-11-07 02:14:22,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943883024] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:22,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [29949348] [2021-11-07 02:14:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:22,676 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:22,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:14:22,677 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:14:22,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 02:14:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:25,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1854 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:14:25,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:14:25,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:14:26,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [29949348] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:26,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:14:26,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 02:14:26,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837812377] [2021-11-07 02:14:26,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:14:26,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:26,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:14:26,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:14:26,771 INFO L87 Difference]: Start difference. First operand 20562 states and 28744 transitions. Second operand has 8 states, 8 states have (on average 24.125) internal successors, (193), 8 states have internal predecessors, (193), 0 states have call successors, (0), 0 states 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 02:14:36,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:36,942 INFO L93 Difference]: Finished difference Result 112319 states and 157050 transitions. [2021-11-07 02:14:36,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 02:14:36,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.125) internal successors, (193), 8 states have internal predecessors, (193), 0 states have call successors, (0), 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 138 [2021-11-07 02:14:36,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:37,110 INFO L225 Difference]: With dead ends: 112319 [2021-11-07 02:14:37,110 INFO L226 Difference]: Without dead ends: 91778 [2021-11-07 02:14:37,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-11-07 02:14:37,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91778 states. [2021-11-07 02:14:39,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91778 to 20570. [2021-11-07 02:14:39,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20570 states, 20491 states have (on average 1.3980772046264214) internal successors, (28648), 20506 states have internal predecessors, (28648), 52 states have call successors, (52), 24 states have call predecessors, (52), 24 states have return successors, (52), 43 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-07 02:14:39,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20570 states to 20570 states and 28752 transitions. [2021-11-07 02:14:39,449 INFO L78 Accepts]: Start accepts. Automaton has 20570 states and 28752 transitions. Word has length 138 [2021-11-07 02:14:39,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:39,450 INFO L470 AbstractCegarLoop]: Abstraction has 20570 states and 28752 transitions. [2021-11-07 02:14:39,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.125) internal successors, (193), 8 states have internal predecessors, (193), 0 states have call successors, (0), 0 states 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 02:14:39,450 INFO L276 IsEmpty]: Start isEmpty. Operand 20570 states and 28752 transitions. [2021-11-07 02:14:39,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-07 02:14:39,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:39,462 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:39,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:39,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:39,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:39,863 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:14:39,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:39,863 INFO L85 PathProgramCache]: Analyzing trace with hash -313689993, now seen corresponding path program 1 times [2021-11-07 02:14:39,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:39,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378324825] [2021-11-07 02:14:39,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:39,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:39,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:39,866 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:39,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 02:14:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:43,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:14:43,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:14:43,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:14:44,664 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:44,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378324825] [2021-11-07 02:14:44,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378324825] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:44,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [889427873] [2021-11-07 02:14:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:44,664 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:44,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:14:44,665 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:14:44,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 02:14:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:47,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:14:47,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:14:47,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:14:48,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [889427873] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:48,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:14:48,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 02:14:48,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760496052] [2021-11-07 02:14:48,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:14:48,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:48,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:14:48,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:14:48,122 INFO L87 Difference]: Start difference. First operand 20570 states and 28752 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 02:14:50,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:50,673 INFO L93 Difference]: Finished difference Result 48953 states and 68429 transitions. [2021-11-07 02:14:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:14:50,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 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 138 [2021-11-07 02:14:50,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:50,712 INFO L225 Difference]: With dead ends: 48953 [2021-11-07 02:14:50,712 INFO L226 Difference]: Without dead ends: 28404 [2021-11-07 02:14:50,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 541 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:14:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28404 states. [2021-11-07 02:14:51,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28404 to 12690. [2021-11-07 02:14:51,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12690 states, 12619 states have (on average 1.3985260321737063) internal successors, (17648), 12632 states have internal predecessors, (17648), 46 states have call successors, (46), 24 states have call predecessors, (46), 24 states have return successors, (46), 37 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-07 02:14:51,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12690 states to 12690 states and 17740 transitions. [2021-11-07 02:14:51,829 INFO L78 Accepts]: Start accepts. Automaton has 12690 states and 17740 transitions. Word has length 138 [2021-11-07 02:14:51,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:51,829 INFO L470 AbstractCegarLoop]: Abstraction has 12690 states and 17740 transitions. [2021-11-07 02:14:51,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 02:14:51,830 INFO L276 IsEmpty]: Start isEmpty. Operand 12690 states and 17740 transitions. [2021-11-07 02:14:51,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-07 02:14:51,842 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:51,842 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:51,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:52,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:52,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:52,243 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:14:52,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:52,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1410247723, now seen corresponding path program 1 times [2021-11-07 02:14:52,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:52,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797423472] [2021-11-07 02:14:52,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:52,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:52,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:52,246 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:52,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 02:14:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:56,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 1983 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:14:56,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:56,839 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 02:14:56,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:57,733 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 02:14:57,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:57,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797423472] [2021-11-07 02:14:57,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797423472] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:57,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [765763206] [2021-11-07 02:14:57,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:57,735 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:57,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:14:57,757 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:14:57,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 02:15:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:00,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 1983 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:15:00,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:01,163 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 02:15:01,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:01,484 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 02:15:01,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [765763206] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:01,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:15:01,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:15:01,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326831126] [2021-11-07 02:15:01,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:15:01,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:01,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:15:01,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:15:01,487 INFO L87 Difference]: Start difference. First operand 12690 states and 17740 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 02:15:04,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:04,816 INFO L93 Difference]: Finished difference Result 12692 states and 17741 transitions. [2021-11-07 02:15:04,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:15:04,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 145 [2021-11-07 02:15:04,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:04,838 INFO L225 Difference]: With dead ends: 12692 [2021-11-07 02:15:04,838 INFO L226 Difference]: Without dead ends: 12690 [2021-11-07 02:15:04,842 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:15:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12690 states. [2021-11-07 02:15:05,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12690 to 12690. [2021-11-07 02:15:05,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12690 states, 12619 states have (on average 1.3983675410095888) internal successors, (17646), 12632 states have internal predecessors, (17646), 46 states have call successors, (46), 24 states have call predecessors, (46), 24 states have return successors, (46), 37 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-07 02:15:05,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12690 states to 12690 states and 17738 transitions. [2021-11-07 02:15:05,865 INFO L78 Accepts]: Start accepts. Automaton has 12690 states and 17738 transitions. Word has length 145 [2021-11-07 02:15:05,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:05,866 INFO L470 AbstractCegarLoop]: Abstraction has 12690 states and 17738 transitions. [2021-11-07 02:15:05,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 02:15:05,866 INFO L276 IsEmpty]: Start isEmpty. Operand 12690 states and 17738 transitions. [2021-11-07 02:15:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 02:15:05,881 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:05,882 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:05,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:06,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:06,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:06,291 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:15:06,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:06,291 INFO L85 PathProgramCache]: Analyzing trace with hash 807312314, now seen corresponding path program 1 times [2021-11-07 02:15:06,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:06,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896499473] [2021-11-07 02:15:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:06,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:06,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:06,295 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:06,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 02:15:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:10,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 1983 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:15:10,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:10,850 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 02:15:10,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:11,813 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 02:15:11,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:11,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896499473] [2021-11-07 02:15:11,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896499473] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:15:11,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1640489146] [2021-11-07 02:15:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:11,814 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:15:11,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:15:11,816 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:15:11,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 02:15:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:14,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1983 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:15:14,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:15:15,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:15:16,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1640489146] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:16,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:15:16,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [5, 5] total 15 [2021-11-07 02:15:16,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199425355] [2021-11-07 02:15:16,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 02:15:16,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:16,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 02:15:16,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:15:16,239 INFO L87 Difference]: Start difference. First operand 12690 states and 17738 transitions. Second operand has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 02:15:30,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:30,196 INFO L93 Difference]: Finished difference Result 63007 states and 88110 transitions. [2021-11-07 02:15:30,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:15:30,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 146 [2021-11-07 02:15:30,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:30,278 INFO L225 Difference]: With dead ends: 63007 [2021-11-07 02:15:30,279 INFO L226 Difference]: Without dead ends: 50338 [2021-11-07 02:15:30,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-07 02:15:30,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50338 states. [2021-11-07 02:15:32,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50338 to 12696. [2021-11-07 02:15:32,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12696 states, 12625 states have (on average 1.398178217821782) internal successors, (17652), 12638 states have internal predecessors, (17652), 46 states have call successors, (46), 24 states have call predecessors, (46), 24 states have return successors, (46), 37 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-07 02:15:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12696 states to 12696 states and 17744 transitions. [2021-11-07 02:15:32,151 INFO L78 Accepts]: Start accepts. Automaton has 12696 states and 17744 transitions. Word has length 146 [2021-11-07 02:15:32,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:32,151 INFO L470 AbstractCegarLoop]: Abstraction has 12696 states and 17744 transitions. [2021-11-07 02:15:32,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 02:15:32,152 INFO L276 IsEmpty]: Start isEmpty. Operand 12696 states and 17744 transitions. [2021-11-07 02:15:32,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 02:15:32,168 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:32,168 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:32,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:32,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-07 02:15:32,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:32,582 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:15:32,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:32,582 INFO L85 PathProgramCache]: Analyzing trace with hash -721924394, now seen corresponding path program 1 times [2021-11-07 02:15:32,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:32,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739369190] [2021-11-07 02:15:32,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:32,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:32,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:32,587 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:32,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 02:15:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:36,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 1994 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:15:36,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:37,660 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 02:15:37,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:38,569 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 02:15:38,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:38,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739369190] [2021-11-07 02:15:38,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739369190] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:15:38,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [399258822] [2021-11-07 02:15:38,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:38,570 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:15:38,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:15:38,571 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:15:38,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 02:15:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:43,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 1994 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:15:43,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:44,531 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 02:15:44,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:45,127 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 02:15:45,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [399258822] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:15:45,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162512414] [2021-11-07 02:15:45,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:45,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:15:45,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:15:45,139 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:15:45,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 02:15:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:48,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 1994 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:15:48,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:15:49,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:15:49,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162512414] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:49,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:15:49,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-07 02:15:49,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835748266] [2021-11-07 02:15:49,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:15:49,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:49,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:15:49,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:15:49,884 INFO L87 Difference]: Start difference. First operand 12696 states and 17744 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 02:15:55,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:55,354 INFO L93 Difference]: Finished difference Result 48056 states and 67150 transitions. [2021-11-07 02:15:55,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:15:55,356 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 148 [2021-11-07 02:15:55,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:55,411 INFO L225 Difference]: With dead ends: 48056 [2021-11-07 02:15:55,411 INFO L226 Difference]: Without dead ends: 35381 [2021-11-07 02:15:55,425 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 884 GetRequests, 873 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:15:55,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35381 states. [2021-11-07 02:15:56,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35381 to 12700. [2021-11-07 02:15:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12700 states, 12629 states have (on average 1.3980521023042205) internal successors, (17656), 12642 states have internal predecessors, (17656), 46 states have call successors, (46), 24 states have call predecessors, (46), 24 states have return successors, (46), 37 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-07 02:15:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12700 states to 12700 states and 17748 transitions. [2021-11-07 02:15:57,016 INFO L78 Accepts]: Start accepts. Automaton has 12700 states and 17748 transitions. Word has length 148 [2021-11-07 02:15:57,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:57,017 INFO L470 AbstractCegarLoop]: Abstraction has 12700 states and 17748 transitions. [2021-11-07 02:15:57,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 02:15:57,017 INFO L276 IsEmpty]: Start isEmpty. Operand 12700 states and 17748 transitions. [2021-11-07 02:15:57,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-07 02:15:57,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:57,031 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:57,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-11-07 02:15:57,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-07 02:15:57,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:57,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:57,646 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:15:57,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:57,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1614078757, now seen corresponding path program 1 times [2021-11-07 02:15:57,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:57,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204151209] [2021-11-07 02:15:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:57,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:57,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:57,650 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:57,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 02:16:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:02,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 2010 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:16:02,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:02,988 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 02:16:02,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:03,953 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 02:16:03,953 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:03,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204151209] [2021-11-07 02:16:03,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204151209] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:16:03,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1089421616] [2021-11-07 02:16:03,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:03,954 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:16:03,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:16:03,955 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:16:03,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-07 02:16:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:07,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 2010 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:16:07,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:16:08,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:16:08,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1089421616] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:08,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:16:08,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:16:08,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376370456] [2021-11-07 02:16:08,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:16:08,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:08,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:16:08,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:16:08,930 INFO L87 Difference]: Start difference. First operand 12700 states and 17748 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 02:16:10,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:10,469 INFO L93 Difference]: Finished difference Result 25391 states and 35490 transitions. [2021-11-07 02:16:10,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:16:10,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 155 [2021-11-07 02:16:10,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:10,492 INFO L225 Difference]: With dead ends: 25391 [2021-11-07 02:16:10,493 INFO L226 Difference]: Without dead ends: 12712 [2021-11-07 02:16:10,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:16:10,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12712 states. [2021-11-07 02:16:11,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12712 to 12708. [2021-11-07 02:16:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12708 states, 12637 states have (on average 1.3978001107857878) internal successors, (17664), 12650 states have internal predecessors, (17664), 46 states have call successors, (46), 24 states have call predecessors, (46), 24 states have return successors, (46), 37 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-07 02:16:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12708 states to 12708 states and 17756 transitions. [2021-11-07 02:16:11,926 INFO L78 Accepts]: Start accepts. Automaton has 12708 states and 17756 transitions. Word has length 155 [2021-11-07 02:16:11,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:11,926 INFO L470 AbstractCegarLoop]: Abstraction has 12708 states and 17756 transitions. [2021-11-07 02:16:11,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 02:16:11,926 INFO L276 IsEmpty]: Start isEmpty. Operand 12708 states and 17756 transitions. [2021-11-07 02:16:11,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-07 02:16:11,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:11,938 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:11,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:12,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:12,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:12,354 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:16:12,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:12,354 INFO L85 PathProgramCache]: Analyzing trace with hash -647494493, now seen corresponding path program 1 times [2021-11-07 02:16:12,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:12,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280516360] [2021-11-07 02:16:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:12,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:12,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:12,358 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:12,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 02:16:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:16,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 2012 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:16:16,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:17,442 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 02:16:17,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:18,285 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 02:16:18,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:18,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280516360] [2021-11-07 02:16:18,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280516360] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:16:18,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1485341697] [2021-11-07 02:16:18,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:18,286 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:16:18,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:16:18,286 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:16:18,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-07 02:16:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:24,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 2012 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:16:24,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:24,701 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 02:16:24,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:25,340 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 02:16:25,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1485341697] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:16:25,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866786945] [2021-11-07 02:16:25,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:25,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:16:25,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:16:25,343 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:16:25,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9b10710-6af2-4d7e-9594-4072ec102f46/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process