./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--media--usb--ttusb-budget--dvb-ttusb-budget.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_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/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_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--ttusb-budget--dvb-ttusb-budget.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/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_5ef595a2-101d-4f3c-9c78-5e7c81056512/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 fa270183f30c4108ea2b2e80e3a005f959ee3ae47a4a31957eaa79c7226d5c4e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:34:21,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:34:21,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:34:21,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:34:21,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:34:21,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:34:21,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:34:21,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:34:21,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:34:21,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:34:21,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:34:21,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:34:21,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:34:21,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:34:21,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:34:21,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:34:21,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:34:21,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:34:21,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:34:21,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:34:21,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:34:21,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:34:21,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:34:21,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:34:21,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:34:21,561 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:34:21,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:34:21,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:34:21,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:34:21,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:34:21,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:34:21,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:34:21,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:34:21,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:34:21,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:34:21,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:34:21,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:34:21,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:34:21,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:34:21,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:34:21,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:34:21,576 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:34:21,619 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:34:21,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:34:21,621 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:34:21,621 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:34:21,622 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:34:21,622 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:34:21,622 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:34:21,622 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:34:21,628 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:34:21,629 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:34:21,630 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:34:21,630 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:34:21,630 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:34:21,630 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:34:21,631 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:34:21,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:34:21,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:34:21,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:34:21,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:34:21,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:34:21,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:34:21,633 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:34:21,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:34:21,633 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:34:21,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:34:21,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:34:21,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:34:21,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:34:21,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:34:21,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:34:21,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:34:21,636 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:34:21,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:34:21,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:34:21,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:34:21,637 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:34:21,637 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_5ef595a2-101d-4f3c-9c78-5e7c81056512/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa270183f30c4108ea2b2e80e3a005f959ee3ae47a4a31957eaa79c7226d5c4e [2021-11-07 01:34:21,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:34:21,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:34:21,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:34:21,942 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:34:21,943 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:34:21,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--ttusb-budget--dvb-ttusb-budget.ko-entry_point.cil.out.i [2021-11-07 01:34:22,038 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/data/7c62afb7d/3a737ab9df494b95969d1c1994fcd6b5/FLAG80441efda [2021-11-07 01:34:22,952 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:34:22,952 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--ttusb-budget--dvb-ttusb-budget.ko-entry_point.cil.out.i [2021-11-07 01:34:23,001 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/data/7c62afb7d/3a737ab9df494b95969d1c1994fcd6b5/FLAG80441efda [2021-11-07 01:34:23,440 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/data/7c62afb7d/3a737ab9df494b95969d1c1994fcd6b5 [2021-11-07 01:34:23,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:34:23,444 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:34:23,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:23,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:34:23,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:34:23,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:23" (1/1) ... [2021-11-07 01:34:23,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d083eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:23, skipping insertion in model container [2021-11-07 01:34:23,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:23" (1/1) ... [2021-11-07 01:34:23,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:34:23,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:34:25,100 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 01:34:25,177 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 01:34:25,184 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 01:34:25,210 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 01:34:25,286 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 01:34:25,298 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 01:34:25,323 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 01:34:25,348 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 01:34:25,368 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 01:34:25,388 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 01:34:25,398 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 01:34:25,423 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 01:34:25,452 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 01:34:25,462 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 01:34:25,470 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 01:34:25,473 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 01:34:25,477 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 01:34:25,481 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 01:34:25,493 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 01:34:25,508 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 01:34:25,531 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 01:34:25,532 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 01:34:25,538 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 01:34:25,539 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 01:34:25,540 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 01:34:25,542 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 01:34:25,542 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 01:34:25,567 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_5ef595a2-101d-4f3c-9c78-5e7c81056512/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--ttusb-budget--dvb-ttusb-budget.ko-entry_point.cil.out.i[277190,277203] [2021-11-07 01:34:25,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:34:25,952 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:34:25,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@624fdf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:25, skipping insertion in model container [2021-11-07 01:34:25,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:25,954 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:34:25,956 INFO L168 Benchmark]: Toolchain (without parser) took 2510.58 ms. Allocated memory was 98.6 MB in the beginning and 136.3 MB in the end (delta: 37.7 MB). Free memory was 66.5 MB in the beginning and 84.9 MB in the end (delta: -18.4 MB). Peak memory consumption was 47.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:34:25,957 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 98.6 MB. Free memory was 75.7 MB in the beginning and 75.7 MB in the end (delta: 50.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:34:25,958 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2508.14 ms. Allocated memory was 98.6 MB in the beginning and 136.3 MB in the end (delta: 37.7 MB). Free memory was 66.2 MB in the beginning and 84.9 MB in the end (delta: -18.7 MB). Peak memory consumption was 47.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:34:25,960 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 98.6 MB. Free memory was 75.7 MB in the beginning and 75.7 MB in the end (delta: 50.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2508.14 ms. Allocated memory was 98.6 MB in the beginning and 136.3 MB in the end (delta: 37.7 MB). Free memory was 66.2 MB in the beginning and 84.9 MB in the end (delta: -18.7 MB). Peak memory consumption was 47.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7054]: 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_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/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_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--ttusb-budget--dvb-ttusb-budget.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/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_5ef595a2-101d-4f3c-9c78-5e7c81056512/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 fa270183f30c4108ea2b2e80e3a005f959ee3ae47a4a31957eaa79c7226d5c4e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:34:28,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:34:28,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:34:28,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:34:28,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:34:28,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:34:28,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:34:28,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:34:28,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:34:28,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:34:28,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:34:28,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:34:28,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:34:28,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:34:28,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:34:28,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:34:28,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:34:28,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:34:28,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:34:28,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:34:28,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:34:28,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:34:28,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:34:28,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:34:28,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:34:28,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:34:28,407 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:34:28,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:34:28,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:34:28,411 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:34:28,411 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:34:28,412 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:34:28,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:34:28,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:34:28,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:34:28,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:34:28,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:34:28,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:34:28,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:34:28,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:34:28,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:34:28,435 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:34:28,479 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:34:28,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:34:28,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:34:28,481 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:34:28,481 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:34:28,482 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:34:28,482 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:34:28,482 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:34:28,482 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:34:28,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:34:28,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:34:28,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:34:28,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:34:28,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:34:28,486 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:34:28,486 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:34:28,486 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:34:28,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:34:28,487 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:34:28,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:34:28,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:34:28,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:34:28,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:34:28,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:34:28,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:34:28,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:34:28,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:34:28,489 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:34:28,489 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:28,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:34:28,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:34:28,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:34:28,490 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_5ef595a2-101d-4f3c-9c78-5e7c81056512/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa270183f30c4108ea2b2e80e3a005f959ee3ae47a4a31957eaa79c7226d5c4e [2021-11-07 01:34:28,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:34:28,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:34:28,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:34:28,910 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:34:28,911 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:34:28,912 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--ttusb-budget--dvb-ttusb-budget.ko-entry_point.cil.out.i [2021-11-07 01:34:28,983 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/data/fd9498996/8163c0767bfd49ef8fd3fda611a09cdf/FLAG0432997c9 [2021-11-07 01:34:30,019 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:34:30,020 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--ttusb-budget--dvb-ttusb-budget.ko-entry_point.cil.out.i [2021-11-07 01:34:30,067 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/data/fd9498996/8163c0767bfd49ef8fd3fda611a09cdf/FLAG0432997c9 [2021-11-07 01:34:30,437 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/data/fd9498996/8163c0767bfd49ef8fd3fda611a09cdf [2021-11-07 01:34:30,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:34:30,441 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:34:30,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:30,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:34:30,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:34:30,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:30" (1/1) ... [2021-11-07 01:34:30,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@260de3de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:30, skipping insertion in model container [2021-11-07 01:34:30,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:30" (1/1) ... [2021-11-07 01:34:30,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:34:30,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:34:32,397 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_5ef595a2-101d-4f3c-9c78-5e7c81056512/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--ttusb-budget--dvb-ttusb-budget.ko-entry_point.cil.out.i[277190,277203] [2021-11-07 01:34:32,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:34:32,722 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:34:32,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:34:33,116 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_5ef595a2-101d-4f3c-9c78-5e7c81056512/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--ttusb-budget--dvb-ttusb-budget.ko-entry_point.cil.out.i[277190,277203] [2021-11-07 01:34:33,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:34:33,202 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:34:33,653 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_5ef595a2-101d-4f3c-9c78-5e7c81056512/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--ttusb-budget--dvb-ttusb-budget.ko-entry_point.cil.out.i[277190,277203] [2021-11-07 01:34:33,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:34:33,822 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:34:33,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:33 WrapperNode [2021-11-07 01:34:33,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:33,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:34:33,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:34:33,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:34:33,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:33" (1/1) ... [2021-11-07 01:34:33,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:33" (1/1) ... [2021-11-07 01:34:34,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:34:34,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:34:34,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:34:34,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:34:34,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:33" (1/1) ... [2021-11-07 01:34:34,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:33" (1/1) ... [2021-11-07 01:34:34,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:33" (1/1) ... [2021-11-07 01:34:34,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:33" (1/1) ... [2021-11-07 01:34:34,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:33" (1/1) ... [2021-11-07 01:34:34,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:33" (1/1) ... [2021-11-07 01:34:34,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:33" (1/1) ... [2021-11-07 01:34:34,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:34:34,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:34:34,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:34:34,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:34:34,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:33" (1/1) ... [2021-11-07 01:34:34,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:34:34,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:34:34,989 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:34:35,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:34:35,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:34:35,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:34:35,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:34:35,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 01:34:35,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:34:35,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 01:34:35,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:34:35,035 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 01:34:35,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:34:35,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:34:35,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:34:35,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:34:35,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:34:35,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:34:35,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 01:34:35,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:34:35,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:34:35,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 01:34:35,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 01:34:35,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 01:34:35,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 01:34:35,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 01:34:35,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:34:35,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:34:35,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 01:34:35,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 01:34:35,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 01:34:35,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 01:34:35,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:34:35,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:36:33,704 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:36:33,704 INFO L299 CfgBuilder]: Removed 2320 assume(true) statements. [2021-11-07 01:36:33,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:36:33 BoogieIcfgContainer [2021-11-07 01:36:33,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:36:33,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:36:33,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:36:33,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:36:33,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:34:30" (1/3) ... [2021-11-07 01:36:33,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80ad855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:36:33, skipping insertion in model container [2021-11-07 01:36:33,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:33" (2/3) ... [2021-11-07 01:36:33,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80ad855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:36:33, skipping insertion in model container [2021-11-07 01:36:33,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:36:33" (3/3) ... [2021-11-07 01:36:33,719 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--ttusb-budget--dvb-ttusb-budget.ko-entry_point.cil.out.i [2021-11-07 01:36:33,725 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:36:33,726 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 183 error locations. [2021-11-07 01:36:33,794 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:36:33,799 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:36:33,800 INFO L340 AbstractCegarLoop]: Starting to check reachability of 183 error locations. [2021-11-07 01:36:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 2726 states, 2542 states have (on average 1.465381589299764) internal successors, (3725), 2725 states have internal predecessors, (3725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:33,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:36:33,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:33,876 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:33,877 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr178ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:36:33,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:33,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1382866813, now seen corresponding path program 1 times [2021-11-07 01:36:33,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:33,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153689952] [2021-11-07 01:36:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:33,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:33,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:33,915 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:33,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:36:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:36,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 1506 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:36:36,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:37,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:37,665 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:37,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153689952] [2021-11-07 01:36:37,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153689952] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:37,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:37,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:36:37,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271571480] [2021-11-07 01:36:37,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:36:37,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:37,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:36:37,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:36:37,696 INFO L87 Difference]: Start difference. First operand has 2726 states, 2542 states have (on average 1.465381589299764) internal successors, (3725), 2725 states have internal predecessors, (3725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:37,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:37,861 INFO L93 Difference]: Finished difference Result 5448 states and 7445 transitions. [2021-11-07 01:36:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:36:37,863 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-11-07 01:36:37,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:37,900 INFO L225 Difference]: With dead ends: 5448 [2021-11-07 01:36:37,901 INFO L226 Difference]: Without dead ends: 2716 [2021-11-07 01:36:37,913 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:36:37,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2716 states. [2021-11-07 01:36:38,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2716 to 2716. [2021-11-07 01:36:38,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2533 states have (on average 1.380971180418476) internal successors, (3498), 2715 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:38,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3498 transitions. [2021-11-07 01:36:38,073 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3498 transitions. Word has length 47 [2021-11-07 01:36:38,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:38,074 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 3498 transitions. [2021-11-07 01:36:38,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:38,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3498 transitions. [2021-11-07 01:36:38,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:36:38,080 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:38,080 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:38,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:38,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:38,296 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr178ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:36:38,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:38,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1138174919, now seen corresponding path program 1 times [2021-11-07 01:36:38,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:38,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025511689] [2021-11-07 01:36:38,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:38,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:38,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:38,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:38,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:36:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:41,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 1506 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:36:41,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:41,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:41,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:41,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025511689] [2021-11-07 01:36:41,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025511689] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:41,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:41,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:36:41,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787340931] [2021-11-07 01:36:41,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:36:41,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:41,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:36:41,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:36:41,565 INFO L87 Difference]: Start difference. First operand 2716 states and 3498 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:41,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:41,915 INFO L93 Difference]: Finished difference Result 5412 states and 6983 transitions. [2021-11-07 01:36:41,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:36:41,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 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 47 [2021-11-07 01:36:41,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:41,932 INFO L225 Difference]: With dead ends: 5412 [2021-11-07 01:36:41,933 INFO L226 Difference]: Without dead ends: 2724 [2021-11-07 01:36:41,938 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:36:41,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-11-07 01:36:41,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2724. [2021-11-07 01:36:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2541 states have (on average 1.3797717434081072) internal successors, (3506), 2723 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 3506 transitions. [2021-11-07 01:36:42,019 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 3506 transitions. Word has length 47 [2021-11-07 01:36:42,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:42,019 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 3506 transitions. [2021-11-07 01:36:42,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:42,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 3506 transitions. [2021-11-07 01:36:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:36:42,027 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:42,027 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] [2021-11-07 01:36:42,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:42,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:42,251 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr178ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:36:42,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:42,252 INFO L85 PathProgramCache]: Analyzing trace with hash 530555129, now seen corresponding path program 1 times [2021-11-07 01:36:42,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:42,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248323265] [2021-11-07 01:36:42,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:42,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:42,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:42,260 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:42,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:36:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:45,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 1536 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:36:45,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:36:45,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:36:46,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:46,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248323265] [2021-11-07 01:36:46,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248323265] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:36:46,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [552803822] [2021-11-07 01:36:46,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:46,448 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:36:46,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:36:46,466 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:36:46,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 01:36:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:47,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1536 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:36:47,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:36:48,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:36:49,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [552803822] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:49,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:36:49,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:36:49,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408490785] [2021-11-07 01:36:49,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:36:49,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:49,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:36:49,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:36:49,440 INFO L87 Difference]: Start difference. First operand 2724 states and 3506 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:49,531 INFO L93 Difference]: Finished difference Result 2724 states and 3506 transitions. [2021-11-07 01:36:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:36:49,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:36:49,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:49,547 INFO L225 Difference]: With dead ends: 2724 [2021-11-07 01:36:49,548 INFO L226 Difference]: Without dead ends: 2722 [2021-11-07 01:36:49,549 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:36:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2021-11-07 01:36:49,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 2722. [2021-11-07 01:36:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2540 states have (on average 1.3795275590551181) internal successors, (3504), 2721 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 3504 transitions. [2021-11-07 01:36:49,648 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 3504 transitions. Word has length 53 [2021-11-07 01:36:49,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:49,649 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 3504 transitions. [2021-11-07 01:36:49,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:49,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 3504 transitions. [2021-11-07 01:36:49,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:36:49,651 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:49,652 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 01:36:49,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:49,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:50,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:50,064 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr179ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:36:50,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:50,064 INFO L85 PathProgramCache]: Analyzing trace with hash -732645365, now seen corresponding path program 1 times [2021-11-07 01:36:50,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:50,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228343631] [2021-11-07 01:36:50,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:50,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:50,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:50,071 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:50,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:36:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:52,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 1537 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:36:52,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:36:53,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:36:53,946 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:53,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228343631] [2021-11-07 01:36:53,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228343631] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:36:53,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [363633567] [2021-11-07 01:36:53,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:53,947 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:36:53,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:36:53,954 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:36:53,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-07 01:36:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:55,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1537 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:36:55,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:36:56,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:36:57,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [363633567] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:57,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:36:57,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:36:57,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176424230] [2021-11-07 01:36:57,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:36:57,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:57,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:36:57,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:36:57,027 INFO L87 Difference]: Start difference. First operand 2722 states and 3504 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:57,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:57,137 INFO L93 Difference]: Finished difference Result 2722 states and 3504 transitions. [2021-11-07 01:36:57,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:36:57,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:36:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:57,156 INFO L225 Difference]: With dead ends: 2722 [2021-11-07 01:36:57,157 INFO L226 Difference]: Without dead ends: 2720 [2021-11-07 01:36:57,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:36:57,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2021-11-07 01:36:57,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 2720. [2021-11-07 01:36:57,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2720 states, 2539 states have (on average 1.379283182355258) internal successors, (3502), 2719 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2720 states to 2720 states and 3502 transitions. [2021-11-07 01:36:57,269 INFO L78 Accepts]: Start accepts. Automaton has 2720 states and 3502 transitions. Word has length 54 [2021-11-07 01:36:57,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:57,271 INFO L470 AbstractCegarLoop]: Abstraction has 2720 states and 3502 transitions. [2021-11-07 01:36:57,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:57,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2720 states and 3502 transitions. [2021-11-07 01:36:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:36:57,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:57,274 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, 1] [2021-11-07 01:36:57,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:57,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:57,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:36:57,688 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr180ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:36:57,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:57,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1237155005, now seen corresponding path program 1 times [2021-11-07 01:36:57,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:57,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697206090] [2021-11-07 01:36:57,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:57,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:57,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:57,692 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:57,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:37:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:00,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:37:00,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:37:00,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:37:01,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:01,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697206090] [2021-11-07 01:37:01,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697206090] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:37:01,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1527968556] [2021-11-07 01:37:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:01,567 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:37:01,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:37:01,583 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:37:01,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 01:37:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:03,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:03,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:37:03,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:37:04,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1527968556] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:04,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:37:04,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:37:04,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271506286] [2021-11-07 01:37:04,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:04,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:04,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:04,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:37:04,503 INFO L87 Difference]: Start difference. First operand 2720 states and 3502 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:04,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:04,694 INFO L93 Difference]: Finished difference Result 2720 states and 3502 transitions. [2021-11-07 01:37:04,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:04,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:37:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:04,711 INFO L225 Difference]: With dead ends: 2720 [2021-11-07 01:37:04,715 INFO L226 Difference]: Without dead ends: 2718 [2021-11-07 01:37:04,716 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:37:04,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2718 states. [2021-11-07 01:37:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2718 to 2718. [2021-11-07 01:37:04,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2718 states, 2538 states have (on average 1.3790386130811663) internal successors, (3500), 2717 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 3500 transitions. [2021-11-07 01:37:04,837 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 3500 transitions. Word has length 55 [2021-11-07 01:37:04,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:04,838 INFO L470 AbstractCegarLoop]: Abstraction has 2718 states and 3500 transitions. [2021-11-07 01:37:04,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 3500 transitions. [2021-11-07 01:37:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:37:04,839 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:04,840 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, 1, 1] [2021-11-07 01:37:04,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:05,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:05,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:37:05,255 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr181ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:37:05,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:05,256 INFO L85 PathProgramCache]: Analyzing trace with hash 302915349, now seen corresponding path program 1 times [2021-11-07 01:37:05,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:05,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736616899] [2021-11-07 01:37:05,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:05,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:05,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:05,259 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:05,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:37:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:08,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:37:08,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:37:08,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:37:09,050 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:09,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736616899] [2021-11-07 01:37:09,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736616899] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:37:09,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [867203125] [2021-11-07 01:37:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:09,051 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:37:09,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:37:09,051 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:37:09,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 01:37:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:10,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:10,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:37:11,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:37:11,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [867203125] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:11,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:37:11,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:37:11,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002384900] [2021-11-07 01:37:11,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:11,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:11,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:11,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:37:11,769 INFO L87 Difference]: Start difference. First operand 2718 states and 3500 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 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 01:37:12,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:12,422 INFO L93 Difference]: Finished difference Result 7216 states and 9350 transitions. [2021-11-07 01:37:12,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:12,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 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 56 [2021-11-07 01:37:12,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:12,448 INFO L225 Difference]: With dead ends: 7216 [2021-11-07 01:37:12,449 INFO L226 Difference]: Without dead ends: 4540 [2021-11-07 01:37:12,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:37:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2021-11-07 01:37:12,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 4304. [2021-11-07 01:37:12,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 4124 states have (on average 1.3959747817652763) internal successors, (5757), 4303 states have internal predecessors, (5757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:12,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 5757 transitions. [2021-11-07 01:37:12,667 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 5757 transitions. Word has length 56 [2021-11-07 01:37:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:12,668 INFO L470 AbstractCegarLoop]: Abstraction has 4304 states and 5757 transitions. [2021-11-07 01:37:12,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 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 01:37:12,668 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 5757 transitions. [2021-11-07 01:37:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:37:12,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:12,669 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, 1, 1, 1] [2021-11-07 01:37:12,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:12,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:13,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:13,087 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr182ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:37:13,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:13,088 INFO L85 PathProgramCache]: Analyzing trace with hash 800456077, now seen corresponding path program 1 times [2021-11-07 01:37:13,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:13,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769055736] [2021-11-07 01:37:13,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:13,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:13,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:13,091 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:13,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:37:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:15,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1540 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:37:15,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:37:16,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:37:17,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:17,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769055736] [2021-11-07 01:37:17,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769055736] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:37:17,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [825617199] [2021-11-07 01:37:17,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:17,019 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:37:17,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:37:17,035 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:37:17,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 01:37:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:18,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 1540 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:18,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:37:19,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:37:19,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [825617199] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:19,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:37:19,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:37:19,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279803132] [2021-11-07 01:37:19,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:19,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:37:19,869 INFO L87 Difference]: Start difference. First operand 4304 states and 5757 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:23,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:23,153 INFO L93 Difference]: Finished difference Result 11757 states and 15936 transitions. [2021-11-07 01:37:23,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:23,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:37:23,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:23,196 INFO L225 Difference]: With dead ends: 11757 [2021-11-07 01:37:23,196 INFO L226 Difference]: Without dead ends: 7488 [2021-11-07 01:37:23,205 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:37:23,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7488 states. [2021-11-07 01:37:23,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7488 to 6965. [2021-11-07 01:37:23,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6965 states, 6787 states have (on average 1.4009135111242081) internal successors, (9508), 6964 states have internal predecessors, (9508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6965 states to 6965 states and 9508 transitions. [2021-11-07 01:37:23,561 INFO L78 Accepts]: Start accepts. Automaton has 6965 states and 9508 transitions. Word has length 57 [2021-11-07 01:37:23,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:23,563 INFO L470 AbstractCegarLoop]: Abstraction has 6965 states and 9508 transitions. [2021-11-07 01:37:23,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand 6965 states and 9508 transitions. [2021-11-07 01:37:23,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:37:23,565 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:23,566 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:23,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:23,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:23,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:37:23,979 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr177ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:37:23,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:23,980 INFO L85 PathProgramCache]: Analyzing trace with hash -815750362, now seen corresponding path program 1 times [2021-11-07 01:37:23,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:23,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44334599] [2021-11-07 01:37:23,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:23,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:23,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:23,984 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:24,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:37:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:26,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:37:26,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:37:27,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:37:28,073 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:28,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44334599] [2021-11-07 01:37:28,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44334599] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:37:28,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1719796363] [2021-11-07 01:37:28,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:28,074 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:37:28,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:37:28,083 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:37:28,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 01:37:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:29,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:29,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:37:30,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:30,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:37:30,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1719796363] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:30,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:37:30,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:37:30,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011075257] [2021-11-07 01:37:30,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:30,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:30,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:30,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:37:30,252 INFO L87 Difference]: Start difference. First operand 6965 states and 9508 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:30,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:30,981 INFO L93 Difference]: Finished difference Result 20470 states and 27966 transitions. [2021-11-07 01:37:30,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:30,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:37:30,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:31,044 INFO L225 Difference]: With dead ends: 20470 [2021-11-07 01:37:31,045 INFO L226 Difference]: Without dead ends: 13547 [2021-11-07 01:37:31,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:37:31,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13547 states. [2021-11-07 01:37:31,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13547 to 12048. [2021-11-07 01:37:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12048 states, 11870 states have (on average 1.4048020219039596) internal successors, (16675), 12047 states have internal predecessors, (16675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:31,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12048 states to 12048 states and 16675 transitions. [2021-11-07 01:37:31,631 INFO L78 Accepts]: Start accepts. Automaton has 12048 states and 16675 transitions. Word has length 65 [2021-11-07 01:37:31,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:31,632 INFO L470 AbstractCegarLoop]: Abstraction has 12048 states and 16675 transitions. [2021-11-07 01:37:31,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:31,632 INFO L276 IsEmpty]: Start isEmpty. Operand 12048 states and 16675 transitions. [2021-11-07 01:37:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:37:31,633 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:31,634 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:31,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:31,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:32,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:37:32,055 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr137ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:37:32,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:32,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1987932974, now seen corresponding path program 1 times [2021-11-07 01:37:32,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:32,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231238476] [2021-11-07 01:37:32,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:32,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:32,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:32,061 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:32,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:37:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:35,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:37:35,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:37:35,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:37:36,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:36,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231238476] [2021-11-07 01:37:36,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231238476] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:37:36,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [422754709] [2021-11-07 01:37:36,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:36,460 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:37:36,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:37:36,461 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:37:36,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:37:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:38,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:38,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:37:38,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:37:38,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [422754709] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:38,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:37:38,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:37:38,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30883146] [2021-11-07 01:37:38,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:38,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:38,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:38,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:37:38,879 INFO L87 Difference]: Start difference. First operand 12048 states and 16675 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:39,592 INFO L93 Difference]: Finished difference Result 33559 states and 46460 transitions. [2021-11-07 01:37:39,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:39,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:37:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:39,651 INFO L225 Difference]: With dead ends: 33559 [2021-11-07 01:37:39,651 INFO L226 Difference]: Without dead ends: 21553 [2021-11-07 01:37:39,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:37:39,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21553 states. [2021-11-07 01:37:40,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21553 to 20582. [2021-11-07 01:37:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20582 states, 20404 states have (on average 1.4074691237012351) internal successors, (28718), 20581 states have internal predecessors, (28718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:40,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20582 states to 20582 states and 28718 transitions. [2021-11-07 01:37:40,695 INFO L78 Accepts]: Start accepts. Automaton has 20582 states and 28718 transitions. Word has length 67 [2021-11-07 01:37:40,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:40,695 INFO L470 AbstractCegarLoop]: Abstraction has 20582 states and 28718 transitions. [2021-11-07 01:37:40,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:40,696 INFO L276 IsEmpty]: Start isEmpty. Operand 20582 states and 28718 transitions. [2021-11-07 01:37:40,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:37:40,698 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:40,698 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:40,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:40,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:41,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:41,111 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr52ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:37:41,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:41,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1833677636, now seen corresponding path program 1 times [2021-11-07 01:37:41,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:41,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053490969] [2021-11-07 01:37:41,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:41,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:41,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:41,115 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:41,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:37:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:44,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 1694 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:37:44,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:37:44,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:37:45,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:45,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053490969] [2021-11-07 01:37:45,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053490969] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:37:45,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [661072552] [2021-11-07 01:37:45,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:45,469 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:37:45,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:37:45,470 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:37:45,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:37:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:47,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 1694 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:47,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:37:47,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:37:47,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [661072552] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:47,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:37:47,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:37:47,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122524306] [2021-11-07 01:37:47,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:47,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:47,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:47,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:37:47,976 INFO L87 Difference]: Start difference. First operand 20582 states and 28718 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:48,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:48,908 INFO L93 Difference]: Finished difference Result 44564 states and 62248 transitions. [2021-11-07 01:37:48,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:48,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:37:48,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:48,968 INFO L225 Difference]: With dead ends: 44564 [2021-11-07 01:37:48,968 INFO L226 Difference]: Without dead ends: 24024 [2021-11-07 01:37:48,995 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:37:49,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24024 states. [2021-11-07 01:37:49,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24024 to 23166. [2021-11-07 01:37:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23166 states, 22988 states have (on average 1.4100400208804593) internal successors, (32414), 23165 states have internal predecessors, (32414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:49,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23166 states to 23166 states and 32414 transitions. [2021-11-07 01:37:49,999 INFO L78 Accepts]: Start accepts. Automaton has 23166 states and 32414 transitions. Word has length 71 [2021-11-07 01:37:49,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:50,000 INFO L470 AbstractCegarLoop]: Abstraction has 23166 states and 32414 transitions. [2021-11-07 01:37:50,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:50,001 INFO L276 IsEmpty]: Start isEmpty. Operand 23166 states and 32414 transitions. [2021-11-07 01:37:50,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:37:50,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:50,010 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:50,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:50,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 01:37:50,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:50,422 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr177ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:37:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:50,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2054417868, now seen corresponding path program 1 times [2021-11-07 01:37:50,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:50,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820993270] [2021-11-07 01:37:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:50,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:50,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:50,426 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:50,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:37:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:53,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 1699 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:37:53,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:54,412 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 01:37:54,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:55,238 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 01:37:55,239 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:55,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820993270] [2021-11-07 01:37:55,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820993270] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:37:55,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1600608494] [2021-11-07 01:37:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:55,239 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:37:55,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:37:55,240 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:37:55,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:37:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:57,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 1699 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:57,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:57,413 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 01:37:57,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:57,604 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 01:37:57,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1600608494] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:57,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:37:57,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:37:57,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49105528] [2021-11-07 01:37:57,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:57,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:57,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:57,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:37:57,607 INFO L87 Difference]: Start difference. First operand 23166 states and 32414 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:00,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:00,824 INFO L93 Difference]: Finished difference Result 46700 states and 65144 transitions. [2021-11-07 01:38:00,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:00,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-07 01:38:00,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:00,871 INFO L225 Difference]: With dead ends: 46700 [2021-11-07 01:38:00,871 INFO L226 Difference]: Without dead ends: 23576 [2021-11-07 01:38:00,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:38:00,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23576 states. [2021-11-07 01:38:02,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23576 to 22890. [2021-11-07 01:38:02,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22890 states, 22714 states have (on average 1.407546006868011) internal successors, (31971), 22889 states have internal predecessors, (31971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:02,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22890 states to 22890 states and 31971 transitions. [2021-11-07 01:38:02,124 INFO L78 Accepts]: Start accepts. Automaton has 22890 states and 31971 transitions. Word has length 88 [2021-11-07 01:38:02,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:02,125 INFO L470 AbstractCegarLoop]: Abstraction has 22890 states and 31971 transitions. [2021-11-07 01:38:02,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:02,125 INFO L276 IsEmpty]: Start isEmpty. Operand 22890 states and 31971 transitions. [2021-11-07 01:38:02,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:38:02,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:02,129 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:02,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:02,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:02,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:02,550 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr177ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:38:02,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:02,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1431202802, now seen corresponding path program 1 times [2021-11-07 01:38:02,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:02,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2636058] [2021-11-07 01:38:02,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:02,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:02,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:02,555 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:02,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:38:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:05,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 1698 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:38:05,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:06,504 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 01:38:06,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:07,341 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 01:38:07,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:07,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2636058] [2021-11-07 01:38:07,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2636058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:07,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1118783935] [2021-11-07 01:38:07,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:07,342 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:07,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:38:07,343 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:38:07,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:38:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:11,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1698 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:38:11,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:11,956 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 01:38:11,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:12,454 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 01:38:12,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1118783935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:12,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020538239] [2021-11-07 01:38:12,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:12,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:38:12,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:38:12,456 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:38:12,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 01:38:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:14,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 1698 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:38:14,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:14,960 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 01:38:14,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:15,462 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 01:38:15,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020538239] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:15,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:38:15,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 14 [2021-11-07 01:38:15,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775074242] [2021-11-07 01:38:15,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:38:15,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:15,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:38:15,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:38:15,465 INFO L87 Difference]: Start difference. First operand 22890 states and 31971 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:18,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:18,142 INFO L93 Difference]: Finished difference Result 34125 states and 47223 transitions. [2021-11-07 01:38:18,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:38:18,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 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 88 [2021-11-07 01:38:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:18,200 INFO L225 Difference]: With dead ends: 34125 [2021-11-07 01:38:18,200 INFO L226 Difference]: Without dead ends: 32910 [2021-11-07 01:38:18,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:38:18,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32910 states. [2021-11-07 01:38:19,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32910 to 21891. [2021-11-07 01:38:19,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21891 states, 21724 states have (on average 1.4012612778493831) internal successors, (30441), 21890 states have internal predecessors, (30441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:19,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21891 states to 21891 states and 30441 transitions. [2021-11-07 01:38:19,464 INFO L78 Accepts]: Start accepts. Automaton has 21891 states and 30441 transitions. Word has length 88 [2021-11-07 01:38:19,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:19,464 INFO L470 AbstractCegarLoop]: Abstraction has 21891 states and 30441 transitions. [2021-11-07 01:38:19,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:19,464 INFO L276 IsEmpty]: Start isEmpty. Operand 21891 states and 30441 transitions. [2021-11-07 01:38:19,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:38:19,467 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:19,467 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:19,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:19,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-07 01:38:19,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:20,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:20,068 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr52ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:38:20,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:20,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1200602966, now seen corresponding path program 1 times [2021-11-07 01:38:20,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:20,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498767419] [2021-11-07 01:38:20,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:20,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:20,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:20,072 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:20,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:38:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:23,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1769 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:38:23,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:38:24,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:38:25,172 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:25,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498767419] [2021-11-07 01:38:25,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498767419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:25,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [655279230] [2021-11-07 01:38:25,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:25,173 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:25,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:38:25,174 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:38:25,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:38:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:27,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1769 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:27,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:38:27,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:38:28,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [655279230] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:28,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:38:28,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:38:28,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751363613] [2021-11-07 01:38:28,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:28,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:28,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:28,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:38:28,010 INFO L87 Difference]: Start difference. First operand 21891 states and 30441 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:31,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:31,232 INFO L93 Difference]: Finished difference Result 43757 states and 60855 transitions. [2021-11-07 01:38:31,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:31,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 89 [2021-11-07 01:38:31,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:31,257 INFO L225 Difference]: With dead ends: 43757 [2021-11-07 01:38:31,258 INFO L226 Difference]: Without dead ends: 21904 [2021-11-07 01:38:31,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:38:31,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21904 states. [2021-11-07 01:38:32,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21904 to 21773. [2021-11-07 01:38:32,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21773 states, 21606 states have (on average 1.402434508932704) internal successors, (30301), 21772 states have internal predecessors, (30301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:32,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21773 states to 21773 states and 30301 transitions. [2021-11-07 01:38:32,268 INFO L78 Accepts]: Start accepts. Automaton has 21773 states and 30301 transitions. Word has length 89 [2021-11-07 01:38:32,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:32,268 INFO L470 AbstractCegarLoop]: Abstraction has 21773 states and 30301 transitions. [2021-11-07 01:38:32,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:32,268 INFO L276 IsEmpty]: Start isEmpty. Operand 21773 states and 30301 transitions. [2021-11-07 01:38:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:38:32,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:32,273 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:32,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-07 01:38:32,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:32,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:32,680 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr52ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:38:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:32,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1961343306, now seen corresponding path program 1 times [2021-11-07 01:38:32,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:32,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376675619] [2021-11-07 01:38:32,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:32,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:32,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:32,684 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:32,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:38:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:36,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:38:36,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:38:36,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:38:37,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:37,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376675619] [2021-11-07 01:38:37,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376675619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:37,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [992494285] [2021-11-07 01:38:37,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:37,717 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:37,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:38:37,717 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:38:37,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:38:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:39,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:39,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:38:41,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:38:42,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [992494285] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:42,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:38:42,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:38:42,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58682770] [2021-11-07 01:38:42,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:42,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:42,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:42,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:38:42,161 INFO L87 Difference]: Start difference. First operand 21773 states and 30301 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:44,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:44,068 INFO L93 Difference]: Finished difference Result 41920 states and 58341 transitions. [2021-11-07 01:38:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:44,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 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 01:38:44,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:44,095 INFO L225 Difference]: With dead ends: 41920 [2021-11-07 01:38:44,095 INFO L226 Difference]: Without dead ends: 20189 [2021-11-07 01:38:44,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:38:44,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20189 states. [2021-11-07 01:38:44,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20189 to 20189. [2021-11-07 01:38:45,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20189 states, 20022 states have (on average 1.335880531415443) internal successors, (26747), 20188 states have internal predecessors, (26747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20189 states to 20189 states and 26747 transitions. [2021-11-07 01:38:45,033 INFO L78 Accepts]: Start accepts. Automaton has 20189 states and 26747 transitions. Word has length 94 [2021-11-07 01:38:45,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:45,033 INFO L470 AbstractCegarLoop]: Abstraction has 20189 states and 26747 transitions. [2021-11-07 01:38:45,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:45,033 INFO L276 IsEmpty]: Start isEmpty. Operand 20189 states and 26747 transitions. [2021-11-07 01:38:45,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:38:45,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:45,101 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:45,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:45,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:45,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:45,501 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr52ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:38:45,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:45,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1961402888, now seen corresponding path program 1 times [2021-11-07 01:38:45,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:45,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901750475] [2021-11-07 01:38:45,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:45,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:45,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:45,508 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:45,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:38:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:49,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:38:49,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:38:50,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:38:50,939 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:50,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901750475] [2021-11-07 01:38:50,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901750475] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:50,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1172950686] [2021-11-07 01:38:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:50,940 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:50,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:38:50,941 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:38:50,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:38:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:53,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:38:53,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:38:53,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:38:54,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1172950686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:54,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:38:54,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:38:54,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84379888] [2021-11-07 01:38:54,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:38:54,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:54,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:38:54,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:38:54,463 INFO L87 Difference]: Start difference. First operand 20189 states and 26747 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:57,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:57,819 INFO L93 Difference]: Finished difference Result 43185 states and 57200 transitions. [2021-11-07 01:38:57,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:38:57,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 01:38:57,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:57,844 INFO L225 Difference]: With dead ends: 43185 [2021-11-07 01:38:57,844 INFO L226 Difference]: Without dead ends: 23038 [2021-11-07 01:38:57,861 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:38:57,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23038 states. [2021-11-07 01:38:58,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23038 to 22653. [2021-11-07 01:38:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22653 states, 22486 states have (on average 1.339811438228231) internal successors, (30127), 22652 states have internal predecessors, (30127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22653 states to 22653 states and 30127 transitions. [2021-11-07 01:38:58,822 INFO L78 Accepts]: Start accepts. Automaton has 22653 states and 30127 transitions. Word has length 94 [2021-11-07 01:38:58,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:58,822 INFO L470 AbstractCegarLoop]: Abstraction has 22653 states and 30127 transitions. [2021-11-07 01:38:58,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:58,823 INFO L276 IsEmpty]: Start isEmpty. Operand 22653 states and 30127 transitions. [2021-11-07 01:38:58,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 01:38:58,825 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:58,825 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:58,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:59,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:59,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:59,226 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr138ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:38:59,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:59,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1951977978, now seen corresponding path program 1 times [2021-11-07 01:38:59,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:59,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220220241] [2021-11-07 01:38:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:59,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:59,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:59,229 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:59,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:39:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:03,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:39:03,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:03,698 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 01:39:03,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:04,546 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 01:39:04,546 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:04,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220220241] [2021-11-07 01:39:04,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220220241] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:04,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [877866094] [2021-11-07 01:39:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:04,546 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:04,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:39:04,547 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:39:04,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:39:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:08,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:39:08,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:09,398 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 01:39:09,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:09,865 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 01:39:09,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [877866094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:09,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443588974] [2021-11-07 01:39:09,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:09,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:39:09,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:39:09,866 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:39:09,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 01:39:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:12,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:39:12,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:12,694 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 01:39:12,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:13,192 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 01:39:13,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443588974] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:13,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:39:13,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 14 [2021-11-07 01:39:13,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567324983] [2021-11-07 01:39:13,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:39:13,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:13,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:39:13,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:39:13,194 INFO L87 Difference]: Start difference. First operand 22653 states and 30127 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:15,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:15,988 INFO L93 Difference]: Finished difference Result 33329 states and 44050 transitions. [2021-11-07 01:39:15,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:39:15,994 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 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 96 [2021-11-07 01:39:15,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:16,025 INFO L225 Difference]: With dead ends: 33329 [2021-11-07 01:39:16,025 INFO L226 Difference]: Without dead ends: 27358 [2021-11-07 01:39:16,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:39:16,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27358 states. [2021-11-07 01:39:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27358 to 16880. [2021-11-07 01:39:16,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16880 states, 16724 states have (on average 1.325340827553217) internal successors, (22165), 16879 states have internal predecessors, (22165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:16,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16880 states to 16880 states and 22165 transitions. [2021-11-07 01:39:16,987 INFO L78 Accepts]: Start accepts. Automaton has 16880 states and 22165 transitions. Word has length 96 [2021-11-07 01:39:16,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:16,987 INFO L470 AbstractCegarLoop]: Abstraction has 16880 states and 22165 transitions. [2021-11-07 01:39:16,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:16,987 INFO L276 IsEmpty]: Start isEmpty. Operand 16880 states and 22165 transitions. [2021-11-07 01:39:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:39:16,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:16,993 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:17,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:17,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:17,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-07 01:39:17,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:17,620 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr52ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:39:17,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:17,620 INFO L85 PathProgramCache]: Analyzing trace with hash 894021463, now seen corresponding path program 1 times [2021-11-07 01:39:17,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:17,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105338726] [2021-11-07 01:39:17,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:17,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:17,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:17,623 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:17,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 01:39:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:21,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 1849 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:39:21,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 01:39:22,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 01:39:22,919 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:22,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105338726] [2021-11-07 01:39:22,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105338726] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:22,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1165843844] [2021-11-07 01:39:22,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:22,920 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:22,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:39:22,920 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:39:22,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-07 01:39:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:25,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 1849 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:39:25,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:39:26,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:39:26,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1165843844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:26,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:39:26,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 01:39:26,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821564062] [2021-11-07 01:39:26,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:39:26,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:26,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:39:26,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:39:26,505 INFO L87 Difference]: Start difference. First operand 16880 states and 22165 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:32,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:32,962 INFO L93 Difference]: Finished difference Result 49202 states and 64388 transitions. [2021-11-07 01:39:32,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:39:32,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-07 01:39:32,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:32,998 INFO L225 Difference]: With dead ends: 49202 [2021-11-07 01:39:32,998 INFO L226 Difference]: Without dead ends: 32364 [2021-11-07 01:39:33,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:39:33,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32364 states. [2021-11-07 01:39:34,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32364 to 16896. [2021-11-07 01:39:34,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16896 states, 16740 states have (on average 1.3250298685782558) internal successors, (22181), 16895 states have internal predecessors, (22181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:34,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16896 states to 16896 states and 22181 transitions. [2021-11-07 01:39:34,059 INFO L78 Accepts]: Start accepts. Automaton has 16896 states and 22181 transitions. Word has length 106 [2021-11-07 01:39:34,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:34,059 INFO L470 AbstractCegarLoop]: Abstraction has 16896 states and 22181 transitions. [2021-11-07 01:39:34,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:34,059 INFO L276 IsEmpty]: Start isEmpty. Operand 16896 states and 22181 transitions. [2021-11-07 01:39:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-07 01:39:34,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:34,062 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:34,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:34,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:34,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:34,465 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr172ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:39:34,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:34,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1082452723, now seen corresponding path program 1 times [2021-11-07 01:39:34,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:34,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891499277] [2021-11-07 01:39:34,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:34,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:34,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:34,469 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:34,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 01:39:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:38,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:39:38,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:39,142 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 01:39:39,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:40,083 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 01:39:40,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:40,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891499277] [2021-11-07 01:39:40,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891499277] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:40,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1204812010] [2021-11-07 01:39:40,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:40,084 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:40,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:39:40,085 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:39:40,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-07 01:39:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:42,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:42,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:43,162 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 01:39:43,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:43,418 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 01:39:43,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1204812010] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:43,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:39:43,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:39:43,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128388241] [2021-11-07 01:39:43,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:39:43,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:43,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:39:43,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:39:43,420 INFO L87 Difference]: Start difference. First operand 16896 states and 22181 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:49,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:49,006 INFO L93 Difference]: Finished difference Result 33750 states and 44317 transitions. [2021-11-07 01:39:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:39:49,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-07 01:39:49,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:49,025 INFO L225 Difference]: With dead ends: 33750 [2021-11-07 01:39:49,025 INFO L226 Difference]: Without dead ends: 16896 [2021-11-07 01:39:49,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:39:49,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16896 states. [2021-11-07 01:39:49,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16896 to 16365. [2021-11-07 01:39:49,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16365 states, 16209 states have (on average 1.28909864889876) internal successors, (20895), 16364 states have internal predecessors, (20895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:49,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16365 states to 16365 states and 20895 transitions. [2021-11-07 01:39:49,988 INFO L78 Accepts]: Start accepts. Automaton has 16365 states and 20895 transitions. Word has length 107 [2021-11-07 01:39:49,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:49,988 INFO L470 AbstractCegarLoop]: Abstraction has 16365 states and 20895 transitions. [2021-11-07 01:39:49,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:49,989 INFO L276 IsEmpty]: Start isEmpty. Operand 16365 states and 20895 transitions. [2021-11-07 01:39:49,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-07 01:39:49,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:49,992 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:50,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:50,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:50,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:50,415 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr172ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:39:50,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:50,416 INFO L85 PathProgramCache]: Analyzing trace with hash 689425713, now seen corresponding path program 1 times [2021-11-07 01:39:50,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:50,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769214478] [2021-11-07 01:39:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:50,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:50,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:50,419 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:50,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-07 01:39:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:54,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1826 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:39:54,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:55,227 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 01:39:55,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:56,192 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 01:39:56,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:56,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769214478] [2021-11-07 01:39:56,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769214478] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:56,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [152290991] [2021-11-07 01:39:56,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:56,193 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:56,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:39:56,194 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:39:56,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-07 01:40:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:00,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 1826 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:40:00,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:01,460 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 01:40:01,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:02,014 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 01:40:02,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [152290991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:02,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540071642] [2021-11-07 01:40:02,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:02,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:40:02,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:40:02,017 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:40:02,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 01:40:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:04,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 1826 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:40:04,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:05,184 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 01:40:05,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:05,662 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 01:40:05,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540071642] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:05,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:40:05,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 14 [2021-11-07 01:40:05,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007814450] [2021-11-07 01:40:05,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:40:05,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:05,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:40:05,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:40:05,664 INFO L87 Difference]: Start difference. First operand 16365 states and 20895 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:37,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:37,328 INFO L93 Difference]: Finished difference Result 44943 states and 58104 transitions. [2021-11-07 01:40:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:40:37,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-07 01:40:37,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:37,371 INFO L225 Difference]: With dead ends: 44943 [2021-11-07 01:40:37,371 INFO L226 Difference]: Without dead ends: 28620 [2021-11-07 01:40:37,386 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 626 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:40:37,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28620 states. [2021-11-07 01:40:38,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28620 to 15005. [2021-11-07 01:40:38,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15005 states, 14965 states have (on average 1.2703641830938857) internal successors, (19011), 15004 states have internal predecessors, (19011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15005 states to 15005 states and 19011 transitions. [2021-11-07 01:40:38,551 INFO L78 Accepts]: Start accepts. Automaton has 15005 states and 19011 transitions. Word has length 107 [2021-11-07 01:40:38,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:38,551 INFO L470 AbstractCegarLoop]: Abstraction has 15005 states and 19011 transitions. [2021-11-07 01:40:38,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:38,551 INFO L276 IsEmpty]: Start isEmpty. Operand 15005 states and 19011 transitions. [2021-11-07 01:40:38,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 01:40:38,554 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:38,554 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:38,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:38,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:38,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:39,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:39,168 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr176ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:40:39,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:39,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1609058928, now seen corresponding path program 1 times [2021-11-07 01:40:39,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:39,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985687428] [2021-11-07 01:40:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:39,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:39,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:39,171 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:39,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-07 01:40:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:43,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:40:43,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:44,118 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 01:40:44,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:44,991 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 01:40:44,991 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:44,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985687428] [2021-11-07 01:40:44,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985687428] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:44,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [505331753] [2021-11-07 01:40:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:44,992 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:44,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:40:44,993 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:40:44,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-07 01:40:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:48,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:40:48,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:48,464 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 01:40:48,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:48,860 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 01:40:48,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [505331753] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:48,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:40:48,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 01:40:48,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085545465] [2021-11-07 01:40:48,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:40:48,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:48,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:40:48,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:40:48,862 INFO L87 Difference]: Start difference. First operand 15005 states and 19011 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:25,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:25,635 INFO L93 Difference]: Finished difference Result 89519 states and 115272 transitions. [2021-11-07 01:42:25,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:42:25,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-07 01:42:25,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:25,737 INFO L225 Difference]: With dead ends: 89519 [2021-11-07 01:42:25,738 INFO L226 Difference]: Without dead ends: 74556 [2021-11-07 01:42:25,757 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:42:25,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74556 states. [2021-11-07 01:42:27,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74556 to 15197. [2021-11-07 01:42:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15197 states, 15157 states have (on average 1.2669393679488026) internal successors, (19203), 15196 states have internal predecessors, (19203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:27,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15197 states to 15197 states and 19203 transitions. [2021-11-07 01:42:27,722 INFO L78 Accepts]: Start accepts. Automaton has 15197 states and 19203 transitions. Word has length 108 [2021-11-07 01:42:27,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:27,722 INFO L470 AbstractCegarLoop]: Abstraction has 15197 states and 19203 transitions. [2021-11-07 01:42:27,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:27,722 INFO L276 IsEmpty]: Start isEmpty. Operand 15197 states and 19203 transitions. [2021-11-07 01:42:27,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 01:42:27,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:27,726 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:27,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:27,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:28,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:28,140 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr176ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:42:28,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:28,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1024739554, now seen corresponding path program 1 times [2021-11-07 01:42:28,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:28,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153348109] [2021-11-07 01:42:28,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:28,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:28,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:28,145 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:28,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-07 01:42:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:32,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1866 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:42:32,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:33,281 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 01:42:33,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:34,221 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 01:42:34,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:34,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153348109] [2021-11-07 01:42:34,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153348109] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:34,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [476531054] [2021-11-07 01:42:34,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:34,222 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:34,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:34,223 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:34,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-07 01:42:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:37,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 1866 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:42:37,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:37,930 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 01:42:37,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:38,191 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 01:42:38,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [476531054] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:38,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:42:38,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:42:38,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386672484] [2021-11-07 01:42:38,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:42:38,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:38,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:42:38,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:42:38,194 INFO L87 Difference]: Start difference. First operand 15197 states and 19203 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:30,036 INFO L93 Difference]: Finished difference Result 51612 states and 66640 transitions. [2021-11-07 01:46:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:46:30,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 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 116 [2021-11-07 01:46:30,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:30,114 INFO L225 Difference]: With dead ends: 51612 [2021-11-07 01:46:30,115 INFO L226 Difference]: Without dead ends: 51558 [2021-11-07 01:46:30,125 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:46:30,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51558 states. [2021-11-07 01:46:31,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51558 to 15197. [2021-11-07 01:46:31,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15197 states, 15157 states have (on average 1.2669393679488026) internal successors, (19203), 15196 states have internal predecessors, (19203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:31,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15197 states to 15197 states and 19203 transitions. [2021-11-07 01:46:31,733 INFO L78 Accepts]: Start accepts. Automaton has 15197 states and 19203 transitions. Word has length 116 [2021-11-07 01:46:31,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:31,734 INFO L470 AbstractCegarLoop]: Abstraction has 15197 states and 19203 transitions. [2021-11-07 01:46:31,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:31,734 INFO L276 IsEmpty]: Start isEmpty. Operand 15197 states and 19203 transitions. [2021-11-07 01:46:31,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 01:46:31,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:31,737 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:31,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:31,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:32,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:32,138 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr171ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 180 more)] === [2021-11-07 01:46:32,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:32,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1895593805, now seen corresponding path program 1 times [2021-11-07 01:46:32,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:32,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725998432] [2021-11-07 01:46:32,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:32,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:32,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:32,143 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:32,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-07 01:46:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:36,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 1898 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:46:36,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:37,584 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 01:46:37,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:38,630 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 01:46:38,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:38,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725998432] [2021-11-07 01:46:38,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725998432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:38,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1103235330] [2021-11-07 01:46:38,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:38,631 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:38,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:38,632 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:38,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-07 01:46:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:44,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 1898 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:46:44,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:45,181 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 01:46:45,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:45,897 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 01:46:45,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1103235330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:45,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776927043] [2021-11-07 01:46:45,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:45,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:46:45,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:46:45,902 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:46:45,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ef595a2-101d-4f3c-9c78-5e7c81056512/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 01:46:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:49,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 1898 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:46:49,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:49,661 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 01:46:49,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:50,275 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 01:46:50,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776927043] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:50,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:46:50,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 14 [2021-11-07 01:46:50,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131626184] [2021-11-07 01:46:50,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:46:50,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:50,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:46:50,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:46:50,278 INFO L87 Difference]: Start difference. First operand 15197 states and 19203 transitions. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)