./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-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e6c477e3f3753c58922818522be04156e728e59c50f004b5ce835b763e4b3e35 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:10:39,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:10:39,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:10:40,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:10:40,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:10:40,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:10:40,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:10:40,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:10:40,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:10:40,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:10:40,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:10:40,039 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:10:40,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:10:40,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:10:40,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:10:40,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:10:40,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:10:40,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:10:40,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:10:40,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:10:40,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:10:40,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:10:40,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:10:40,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:10:40,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:10:40,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:10:40,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:10:40,095 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:10:40,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:10:40,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:10:40,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:10:40,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:10:40,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:10:40,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:10:40,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:10:40,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:10:40,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:10:40,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:10:40,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:10:40,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:10:40,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:10:40,112 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-03 04:10:40,171 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:10:40,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:10:40,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:10:40,174 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:10:40,175 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:10:40,175 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:10:40,175 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:10:40,175 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:10:40,176 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:10:40,176 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:10:40,177 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:10:40,178 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:10:40,178 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:10:40,179 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:10:40,179 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:10:40,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:10:40,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:10:40,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:10:40,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:10:40,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:10:40,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:10:40,182 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:10:40,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:10:40,183 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:10:40,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:10:40,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:10:40,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:10:40,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:10:40,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:10:40,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:10:40,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:10:40,187 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:10:40,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:10:40,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:10:40,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:10:40,189 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:10:40,189 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_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6c477e3f3753c58922818522be04156e728e59c50f004b5ce835b763e4b3e35 [2021-11-03 04:10:40,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:10:40,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:10:40,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:10:40,594 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:10:40,596 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:10:40,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i [2021-11-03 04:10:40,682 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/data/046962595/dea64194e6b04f03a9e0e1572a129fd4/FLAG0fb31594b [2021-11-03 04:10:41,674 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:10:41,675 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i [2021-11-03 04:10:41,745 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/data/046962595/dea64194e6b04f03a9e0e1572a129fd4/FLAG0fb31594b [2021-11-03 04:10:42,066 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/data/046962595/dea64194e6b04f03a9e0e1572a129fd4 [2021-11-03 04:10:42,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:10:42,071 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:10:42,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:10:42,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:10:42,078 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:10:42,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:10:42" (1/1) ... [2021-11-03 04:10:42,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28285c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:42, skipping insertion in model container [2021-11-03 04:10:42,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:10:42" (1/1) ... [2021-11-03 04:10:42,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:10:42,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:10:43,745 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:43,748 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:43,763 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:43,765 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:43,812 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:43,841 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:43,901 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:43,926 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:43,950 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:43,958 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:43,970 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,024 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,025 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,041 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,042 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,048 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,048 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,054 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,055 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,146 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,146 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,151 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,159 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,160 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,161 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,175 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,176 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,177 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,177 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,178 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,180 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,180 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,181 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,182 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,183 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,272 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,286 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,294 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,295 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,298 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,299 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,372 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,380 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,389 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,391 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,395 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,477 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,486 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 04:10:44,506 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_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i[208384,208397] [2021-11-03 04:10:44,558 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-03 04:10:44,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:10:44,623 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 04:10:44,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3ee65201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:44, skipping insertion in model container [2021-11-03 04:10:44,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:10:44,625 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:10:44,628 INFO L168 Benchmark]: Toolchain (without parser) took 2554.98 ms. Allocated memory was 107.0 MB in the beginning and 155.2 MB in the end (delta: 48.2 MB). Free memory was 60.7 MB in the beginning and 92.5 MB in the end (delta: -31.8 MB). Peak memory consumption was 32.7 MB. Max. memory is 16.1 GB. [2021-11-03 04:10:44,629 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 107.0 MB. Free memory is still 86.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:10:44,630 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2551.29 ms. Allocated memory was 107.0 MB in the beginning and 155.2 MB in the end (delta: 48.2 MB). Free memory was 60.5 MB in the beginning and 92.5 MB in the end (delta: -32.0 MB). Peak memory consumption was 32.7 MB. Max. memory is 16.1 GB. [2021-11-03 04:10:44,632 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 107.0 MB. Free memory is still 86.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2551.29 ms. Allocated memory was 107.0 MB in the beginning and 155.2 MB in the end (delta: 48.2 MB). Free memory was 60.5 MB in the beginning and 92.5 MB in the end (delta: -32.0 MB). Peak memory consumption was 32.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4575]: 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_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e6c477e3f3753c58922818522be04156e728e59c50f004b5ce835b763e4b3e35 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:10:47,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:10:47,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:10:47,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:10:47,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:10:47,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:10:47,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:10:47,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:10:47,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:10:47,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:10:47,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:10:47,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:10:47,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:10:47,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:10:47,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:10:47,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:10:47,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:10:47,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:10:47,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:10:47,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:10:47,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:10:47,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:10:47,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:10:47,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:10:47,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:10:47,630 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:10:47,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:10:47,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:10:47,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:10:47,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:10:47,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:10:47,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:10:47,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:10:47,642 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:10:47,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:10:47,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:10:47,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:10:47,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:10:47,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:10:47,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:10:47,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:10:47,656 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-03 04:10:47,706 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:10:47,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:10:47,708 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:10:47,709 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:10:47,709 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:10:47,710 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:10:47,710 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:10:47,710 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:10:47,711 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:10:47,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:10:47,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:10:47,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:10:47,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:10:47,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:10:47,715 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:10:47,716 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:10:47,716 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:10:47,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:10:47,717 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:10:47,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:10:47,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:10:47,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:10:47,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:10:47,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:10:47,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:10:47,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:10:47,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:10:47,720 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:10:47,721 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:10:47,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:10:47,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:10:47,722 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:10:47,722 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_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6c477e3f3753c58922818522be04156e728e59c50f004b5ce835b763e4b3e35 [2021-11-03 04:10:48,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:10:48,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:10:48,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:10:48,258 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:10:48,259 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:10:48,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i [2021-11-03 04:10:48,349 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/data/d1e9caa7c/5597ecee10d341078522f2303ca56d72/FLAGe97808ca9 [2021-11-03 04:10:49,433 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:10:49,434 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i [2021-11-03 04:10:49,497 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/data/d1e9caa7c/5597ecee10d341078522f2303ca56d72/FLAGe97808ca9 [2021-11-03 04:10:49,830 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/data/d1e9caa7c/5597ecee10d341078522f2303ca56d72 [2021-11-03 04:10:49,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:10:49,836 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:10:49,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:10:49,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:10:49,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:10:49,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:10:49" (1/1) ... [2021-11-03 04:10:49,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f856985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:49, skipping insertion in model container [2021-11-03 04:10:49,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:10:49" (1/1) ... [2021-11-03 04:10:49,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:10:50,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:10:52,163 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_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i[208384,208397] [2021-11-03 04:10:52,229 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-03 04:10:52,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:10:52,344 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:10:52,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:10:52,789 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_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i[208384,208397] [2021-11-03 04:10:52,800 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-03 04:10:52,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:10:52,859 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:10:53,217 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i[208384,208397] [2021-11-03 04:10:53,224 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-03 04:10:53,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:10:53,531 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:10:53,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:53 WrapperNode [2021-11-03 04:10:53,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:10:53,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:10:53,534 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:10:53,534 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:10:53,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:53" (1/1) ... [2021-11-03 04:10:53,659 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:53" (1/1) ... [2021-11-03 04:10:54,180 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:10:54,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:10:54,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:10:54,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:10:54,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:53" (1/1) ... [2021-11-03 04:10:54,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:53" (1/1) ... [2021-11-03 04:10:54,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:53" (1/1) ... [2021-11-03 04:10:54,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:53" (1/1) ... [2021-11-03 04:10:54,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:53" (1/1) ... [2021-11-03 04:10:54,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:53" (1/1) ... [2021-11-03 04:10:54,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:53" (1/1) ... [2021-11-03 04:10:55,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:10:55,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:10:55,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:10:55,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:10:55,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:53" (1/1) ... [2021-11-03 04:10:55,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:10:55,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:10:55,147 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:10:55,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:10:55,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 04:10:55,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-03 04:10:55,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:10:55,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-03 04:10:55,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-03 04:10:55,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-03 04:10:55,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:10:55,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:10:55,266 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-03 04:10:55,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-03 04:10:55,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-03 04:10:55,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-03 04:10:55,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:10:55,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:10:55,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 04:10:55,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-03 04:10:55,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:10:55,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-03 04:10:55,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-03 04:10:55,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-03 04:10:55,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-03 04:10:55,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-03 04:10:55,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-03 04:10:55,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:10:55,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:10:55,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-03 04:10:55,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-03 04:10:55,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-03 04:10:55,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-03 04:10:55,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:10:55,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:12:33,830 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:12:33,830 INFO L299 CfgBuilder]: Removed 1941 assume(true) statements. [2021-11-03 04:12:33,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:12:33 BoogieIcfgContainer [2021-11-03 04:12:33,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:12:33,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:12:33,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:12:33,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:12:33,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:10:49" (1/3) ... [2021-11-03 04:12:33,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fdab9a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:12:33, skipping insertion in model container [2021-11-03 04:12:33,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:53" (2/3) ... [2021-11-03 04:12:33,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fdab9a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:12:33, skipping insertion in model container [2021-11-03 04:12:33,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:12:33" (3/3) ... [2021-11-03 04:12:33,844 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i [2021-11-03 04:12:33,858 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:12:33,858 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:12:33,925 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:12:33,931 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:12:33,931 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:12:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand has 1970 states, 1968 states have (on average 1.416158536585366) internal successors, (2787), 1969 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:34,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-03 04:12:34,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:12:34,061 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:12:34,062 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:12:34,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:12:34,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1900913398, now seen corresponding path program 1 times [2021-11-03 04:12:34,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:12:34,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979232070] [2021-11-03 04:12:34,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:12:34,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:12:34,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:12:34,096 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:12:34,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:12:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:12:36,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1972 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:12:36,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:12:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:12:37,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:12:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:12:38,081 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:12:38,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979232070] [2021-11-03 04:12:38,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979232070] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:12:38,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:12:38,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:12:38,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812016165] [2021-11-03 04:12:38,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:12:38,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:12:38,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:12:38,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:12:38,116 INFO L87 Difference]: Start difference. First operand has 1970 states, 1968 states have (on average 1.416158536585366) internal successors, (2787), 1969 states have internal predecessors, (2787), 0 states have call successors, (0), 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 47.0) internal successors, (94), 2 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) [2021-11-03 04:12:38,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:12:38,238 INFO L93 Difference]: Finished difference Result 3936 states and 5569 transitions. [2021-11-03 04:12:38,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:12:38,240 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 47.0) internal successors, (94), 2 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 94 [2021-11-03 04:12:38,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:12:38,268 INFO L225 Difference]: With dead ends: 3936 [2021-11-03 04:12:38,269 INFO L226 Difference]: Without dead ends: 1956 [2021-11-03 04:12:38,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:12:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-11-03 04:12:38,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1956. [2021-11-03 04:12:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 1.3989769820971867) internal successors, (2735), 1955 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 2735 transitions. [2021-11-03 04:12:38,408 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 2735 transitions. Word has length 94 [2021-11-03 04:12:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:12:38,408 INFO L470 AbstractCegarLoop]: Abstraction has 1956 states and 2735 transitions. [2021-11-03 04:12:38,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 47.0) internal successors, (94), 2 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) [2021-11-03 04:12:38,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 2735 transitions. [2021-11-03 04:12:38,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-03 04:12:38,413 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:12:38,413 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:12:38,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:12:38,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:12:38,615 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:12:38,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:12:38,615 INFO L85 PathProgramCache]: Analyzing trace with hash 753017488, now seen corresponding path program 1 times [2021-11-03 04:12:38,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:12:38,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854643749] [2021-11-03 04:12:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:12:38,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:12:38,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:12:38,622 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:12:38,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:12:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:12:41,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 1972 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:12:41,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:12:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:12:41,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:12:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:12:42,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:12:42,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854643749] [2021-11-03 04:12:42,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854643749] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:12:42,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:12:42,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:12:42,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231023029] [2021-11-03 04:12:42,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:12:42,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:12:42,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:12:42,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:12:42,205 INFO L87 Difference]: Start difference. First operand 1956 states and 2735 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:42,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:12:42,721 INFO L93 Difference]: Finished difference Result 3857 states and 5423 transitions. [2021-11-03 04:12:42,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:12:42,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 [2021-11-03 04:12:42,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:12:42,736 INFO L225 Difference]: With dead ends: 3857 [2021-11-03 04:12:42,736 INFO L226 Difference]: Without dead ends: 1965 [2021-11-03 04:12:42,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:12:42,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-11-03 04:12:42,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1965. [2021-11-03 04:12:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.3971486761710794) internal successors, (2744), 1964 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:42,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2744 transitions. [2021-11-03 04:12:42,810 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2744 transitions. Word has length 94 [2021-11-03 04:12:42,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:12:42,811 INFO L470 AbstractCegarLoop]: Abstraction has 1965 states and 2744 transitions. [2021-11-03 04:12:42,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:42,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2744 transitions. [2021-11-03 04:12:42,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-03 04:12:42,814 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:12:42,815 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:12:42,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:12:43,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:12:43,041 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:12:43,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:12:43,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1593723451, now seen corresponding path program 1 times [2021-11-03 04:12:43,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:12:43,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685819492] [2021-11-03 04:12:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:12:43,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:12:43,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:12:43,051 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:12:43,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:12:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:12:45,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 2007 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:12:45,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:12:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:12:46,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:12:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:12:47,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:12:47,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685819492] [2021-11-03 04:12:47,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685819492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:12:47,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [639459174] [2021-11-03 04:12:47,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:12:47,462 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:12:47,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:12:47,469 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:12:47,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-03 04:12:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:12:48,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 2007 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:12:48,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:12:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 04:12:50,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:12:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 04:12:51,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [639459174] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:12:51,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:12:51,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-03 04:12:51,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137942087] [2021-11-03 04:12:51,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:12:51,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:12:51,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:12:51,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:12:51,249 INFO L87 Difference]: Start difference. First operand 1965 states and 2744 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:51,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:12:51,398 INFO L93 Difference]: Finished difference Result 3845 states and 5398 transitions. [2021-11-03 04:12:51,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:12:51,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 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 101 [2021-11-03 04:12:51,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:12:51,427 INFO L225 Difference]: With dead ends: 3845 [2021-11-03 04:12:51,427 INFO L226 Difference]: Without dead ends: 3841 [2021-11-03 04:12:51,429 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:12:51,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2021-11-03 04:12:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 3841. [2021-11-03 04:12:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3841 states, 3840 states have (on average 1.4044270833333334) internal successors, (5393), 3840 states have internal predecessors, (5393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:51,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3841 states to 3841 states and 5393 transitions. [2021-11-03 04:12:51,571 INFO L78 Accepts]: Start accepts. Automaton has 3841 states and 5393 transitions. Word has length 101 [2021-11-03 04:12:51,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:12:51,574 INFO L470 AbstractCegarLoop]: Abstraction has 3841 states and 5393 transitions. [2021-11-03 04:12:51,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:51,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3841 states and 5393 transitions. [2021-11-03 04:12:51,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-03 04:12:51,587 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:12:51,588 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:12:51,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:12:51,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:12:52,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:12:52,008 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:12:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:12:52,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1634737304, now seen corresponding path program 1 times [2021-11-03 04:12:52,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:12:52,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971406217] [2021-11-03 04:12:52,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:12:52,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:12:52,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:12:52,016 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:12:52,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:12:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:12:55,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 2465 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:12:55,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:12:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-03 04:12:56,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:12:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-03 04:12:57,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:12:57,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971406217] [2021-11-03 04:12:57,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971406217] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:12:57,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [582217698] [2021-11-03 04:12:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:12:57,577 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:12:57,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:12:57,584 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:12:57,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-03 04:12:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:12:59,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 2465 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:12:59,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 04:13:00,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 04:13:00,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [582217698] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:00,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:13:00,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 04:13:00,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015865887] [2021-11-03 04:13:00,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:13:00,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:00,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:13:00,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:13:00,974 INFO L87 Difference]: Start difference. First operand 3841 states and 5393 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:01,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:01,585 INFO L93 Difference]: Finished difference Result 10707 states and 15091 transitions. [2021-11-03 04:13:01,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:13:01,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-11-03 04:13:01,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:01,637 INFO L225 Difference]: With dead ends: 10707 [2021-11-03 04:13:01,638 INFO L226 Difference]: Without dead ends: 6951 [2021-11-03 04:13:01,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 669 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:13:01,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-11-03 04:13:01,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 6937. [2021-11-03 04:13:01,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6937 states, 6936 states have (on average 1.4090253748558246) internal successors, (9773), 6936 states have internal predecessors, (9773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6937 states to 6937 states and 9773 transitions. [2021-11-03 04:13:01,923 INFO L78 Accepts]: Start accepts. Automaton has 6937 states and 9773 transitions. Word has length 170 [2021-11-03 04:13:01,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:01,925 INFO L470 AbstractCegarLoop]: Abstraction has 6937 states and 9773 transitions. [2021-11-03 04:13:01,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:01,925 INFO L276 IsEmpty]: Start isEmpty. Operand 6937 states and 9773 transitions. [2021-11-03 04:13:01,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-03 04:13:01,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:01,937 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:01,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:02,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:02,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:13:02,351 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:02,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:02,352 INFO L85 PathProgramCache]: Analyzing trace with hash -455394727, now seen corresponding path program 1 times [2021-11-03 04:13:02,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:02,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026521163] [2021-11-03 04:13:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:02,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:02,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:02,359 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:02,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:13:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:06,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 2675 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:13:06,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:13:07,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:13:08,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:08,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026521163] [2021-11-03 04:13:08,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026521163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:13:08,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [437285673] [2021-11-03 04:13:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:08,768 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:13:08,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:13:08,769 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:13:08,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-03 04:13:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:10,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 2675 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:13:10,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:13:11,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:13:12,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [437285673] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:12,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:13:12,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 04:13:12,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138188354] [2021-11-03 04:13:12,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:13:12,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:12,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:13:12,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:13:12,068 INFO L87 Difference]: Start difference. First operand 6937 states and 9773 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:13,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:13,550 INFO L93 Difference]: Finished difference Result 20065 states and 28307 transitions. [2021-11-03 04:13:13,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:13:13,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 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 215 [2021-11-03 04:13:13,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:13,660 INFO L225 Difference]: With dead ends: 20065 [2021-11-03 04:13:13,660 INFO L226 Difference]: Without dead ends: 13213 [2021-11-03 04:13:13,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 849 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:13:13,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13213 states. [2021-11-03 04:13:14,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13213 to 7065. [2021-11-03 04:13:14,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7065 states, 7064 states have (on average 1.4016138165345413) internal successors, (9901), 7064 states have internal predecessors, (9901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:14,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7065 states to 7065 states and 9901 transitions. [2021-11-03 04:13:14,225 INFO L78 Accepts]: Start accepts. Automaton has 7065 states and 9901 transitions. Word has length 215 [2021-11-03 04:13:14,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:14,226 INFO L470 AbstractCegarLoop]: Abstraction has 7065 states and 9901 transitions. [2021-11-03 04:13:14,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:14,227 INFO L276 IsEmpty]: Start isEmpty. Operand 7065 states and 9901 transitions. [2021-11-03 04:13:14,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-03 04:13:14,241 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:14,242 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:14,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:14,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:14,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:13:14,664 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:14,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:14,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1243388035, now seen corresponding path program 1 times [2021-11-03 04:13:14,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:14,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578754483] [2021-11-03 04:13:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:14,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:14,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:14,677 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:14,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:13:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:18,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 2676 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:13:18,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:13:20,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:13:21,560 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:21,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578754483] [2021-11-03 04:13:21,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578754483] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:13:21,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1260649855] [2021-11-03 04:13:21,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:21,560 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:13:21,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:13:21,561 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:13:21,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-03 04:13:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:23,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 2676 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:13:23,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:13:25,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:13:28,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1260649855] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:28,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:13:28,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-03 04:13:28,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185345078] [2021-11-03 04:13:28,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:13:28,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:28,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:13:28,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:13:28,153 INFO L87 Difference]: Start difference. First operand 7065 states and 9901 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:28,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:28,744 INFO L93 Difference]: Finished difference Result 21007 states and 29487 transitions. [2021-11-03 04:13:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:13:28,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 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 217 [2021-11-03 04:13:28,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:28,791 INFO L225 Difference]: With dead ends: 21007 [2021-11-03 04:13:28,792 INFO L226 Difference]: Without dead ends: 14027 [2021-11-03 04:13:28,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 857 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:13:28,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14027 states. [2021-11-03 04:13:29,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14027 to 12439. [2021-11-03 04:13:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12439 states, 12438 states have (on average 1.4110789515999356) internal successors, (17551), 12438 states have internal predecessors, (17551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12439 states to 12439 states and 17551 transitions. [2021-11-03 04:13:29,573 INFO L78 Accepts]: Start accepts. Automaton has 12439 states and 17551 transitions. Word has length 217 [2021-11-03 04:13:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:29,573 INFO L470 AbstractCegarLoop]: Abstraction has 12439 states and 17551 transitions. [2021-11-03 04:13:29,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:29,574 INFO L276 IsEmpty]: Start isEmpty. Operand 12439 states and 17551 transitions. [2021-11-03 04:13:29,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-03 04:13:29,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:29,596 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:29,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:29,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:30,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:13:30,021 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:30,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:30,022 INFO L85 PathProgramCache]: Analyzing trace with hash 916736211, now seen corresponding path program 1 times [2021-11-03 04:13:30,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:30,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543787161] [2021-11-03 04:13:30,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:30,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:30,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:30,028 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:30,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:13:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:34,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:13:34,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:13:35,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:13:37,078 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:37,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543787161] [2021-11-03 04:13:37,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543787161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:13:37,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [450374138] [2021-11-03 04:13:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:37,079 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:13:37,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:13:37,083 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:13:37,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-03 04:13:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:39,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:13:39,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:13:40,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:13:41,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [450374138] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:41,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:13:41,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-03 04:13:41,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733538244] [2021-11-03 04:13:41,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:13:41,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:41,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:13:41,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:13:41,170 INFO L87 Difference]: Start difference. First operand 12439 states and 17551 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:46,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:46,262 INFO L93 Difference]: Finished difference Result 58595 states and 82805 transitions. [2021-11-03 04:13:46,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:13:46,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 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 218 [2021-11-03 04:13:46,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:46,421 INFO L225 Difference]: With dead ends: 58595 [2021-11-03 04:13:46,421 INFO L226 Difference]: Without dead ends: 46241 [2021-11-03 04:13:46,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 861 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-03 04:13:46,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46241 states. [2021-11-03 04:13:47,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46241 to 12447. [2021-11-03 04:13:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12447 states, 12446 states have (on average 1.410814719588623) internal successors, (17559), 12446 states have internal predecessors, (17559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12447 states to 12447 states and 17559 transitions. [2021-11-03 04:13:47,574 INFO L78 Accepts]: Start accepts. Automaton has 12447 states and 17559 transitions. Word has length 218 [2021-11-03 04:13:47,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:47,575 INFO L470 AbstractCegarLoop]: Abstraction has 12447 states and 17559 transitions. [2021-11-03 04:13:47,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:47,576 INFO L276 IsEmpty]: Start isEmpty. Operand 12447 states and 17559 transitions. [2021-11-03 04:13:47,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-03 04:13:47,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:47,599 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:47,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:47,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:48,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:13:48,013 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:48,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:48,014 INFO L85 PathProgramCache]: Analyzing trace with hash 635633367, now seen corresponding path program 1 times [2021-11-03 04:13:48,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:48,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531352920] [2021-11-03 04:13:48,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:48,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:48,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:48,018 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:48,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:13:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:52,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 2809 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:13:52,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:13:53,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:13:55,224 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:55,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531352920] [2021-11-03 04:13:55,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531352920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:13:55,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [540640806] [2021-11-03 04:13:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:55,226 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:13:55,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:13:55,240 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:13:55,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-03 04:13:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:58,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 2809 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:13:58,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:13:58,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:13:59,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [540640806] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:59,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:13:59,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 04:13:59,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691458009] [2021-11-03 04:13:59,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:13:59,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:59,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:13:59,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:13:59,607 INFO L87 Difference]: Start difference. First operand 12447 states and 17559 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:01,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:01,077 INFO L93 Difference]: Finished difference Result 35295 states and 49809 transitions. [2021-11-03 04:14:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:14:01,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 243 [2021-11-03 04:14:01,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:01,144 INFO L225 Difference]: With dead ends: 35295 [2021-11-03 04:14:01,144 INFO L226 Difference]: Without dead ends: 22933 [2021-11-03 04:14:01,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 968 GetRequests, 961 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:14:01,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22933 states. [2021-11-03 04:14:01,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22933 to 12319. [2021-11-03 04:14:01,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12319 states, 12318 states have (on average 1.3994966715375872) internal successors, (17239), 12318 states have internal predecessors, (17239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12319 states to 12319 states and 17239 transitions. [2021-11-03 04:14:01,939 INFO L78 Accepts]: Start accepts. Automaton has 12319 states and 17239 transitions. Word has length 243 [2021-11-03 04:14:01,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:01,940 INFO L470 AbstractCegarLoop]: Abstraction has 12319 states and 17239 transitions. [2021-11-03 04:14:01,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:01,941 INFO L276 IsEmpty]: Start isEmpty. Operand 12319 states and 17239 transitions. [2021-11-03 04:14:01,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-03 04:14:01,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:01,974 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:14:01,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:02,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:02,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:14:02,391 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:14:02,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:02,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1309197004, now seen corresponding path program 1 times [2021-11-03 04:14:02,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:02,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138341678] [2021-11-03 04:14:02,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:02,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:02,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:02,398 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:02,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:14:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:07,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 2807 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:14:07,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:14:08,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:14:10,099 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:10,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138341678] [2021-11-03 04:14:10,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138341678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:10,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1506612489] [2021-11-03 04:14:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:10,100 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:14:10,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:14:10,122 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:14:10,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 04:14:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:13,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 2807 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:14:13,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:14:13,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:14:14,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1506612489] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:14:14,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:14:14,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-03 04:14:14,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129718954] [2021-11-03 04:14:14,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:14:14,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:14,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:14:14,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:14:14,681 INFO L87 Difference]: Start difference. First operand 12319 states and 17239 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:17,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:17,192 INFO L93 Difference]: Finished difference Result 45041 states and 62944 transitions. [2021-11-03 04:14:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:14:17,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 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 243 [2021-11-03 04:14:17,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:17,281 INFO L225 Difference]: With dead ends: 45041 [2021-11-03 04:14:17,281 INFO L226 Difference]: Without dead ends: 32807 [2021-11-03 04:14:17,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 968 GetRequests, 960 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:14:17,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32807 states. [2021-11-03 04:14:18,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32807 to 12427. [2021-11-03 04:14:18,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12427 states, 12426 states have (on average 1.3902301625623692) internal successors, (17275), 12426 states have internal predecessors, (17275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:18,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12427 states to 12427 states and 17275 transitions. [2021-11-03 04:14:18,397 INFO L78 Accepts]: Start accepts. Automaton has 12427 states and 17275 transitions. Word has length 243 [2021-11-03 04:14:18,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:18,397 INFO L470 AbstractCegarLoop]: Abstraction has 12427 states and 17275 transitions. [2021-11-03 04:14:18,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:18,398 INFO L276 IsEmpty]: Start isEmpty. Operand 12427 states and 17275 transitions. [2021-11-03 04:14:18,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-03 04:14:18,418 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:18,419 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:14:18,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:18,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:18,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:14:18,833 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:14:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:18,833 INFO L85 PathProgramCache]: Analyzing trace with hash -992172129, now seen corresponding path program 1 times [2021-11-03 04:14:18,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:18,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170666853] [2021-11-03 04:14:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:18,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:18,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:18,837 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:18,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:14:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:23,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 2808 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:14:23,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:14:25,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:14:26,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:26,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170666853] [2021-11-03 04:14:26,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170666853] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:26,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [998105531] [2021-11-03 04:14:26,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:26,670 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:14:26,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:14:26,671 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:14:26,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-03 04:14:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:29,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 2808 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:14:29,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:14:30,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:14:31,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [998105531] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:14:31,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:14:31,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-03 04:14:31,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133195359] [2021-11-03 04:14:31,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:14:31,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:31,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:14:31,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:14:31,433 INFO L87 Difference]: Start difference. First operand 12427 states and 17275 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:34,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:34,514 INFO L93 Difference]: Finished difference Result 57931 states and 80701 transitions. [2021-11-03 04:14:34,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:14:34,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 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 245 [2021-11-03 04:14:34,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:34,598 INFO L225 Difference]: With dead ends: 57931 [2021-11-03 04:14:34,598 INFO L226 Difference]: Without dead ends: 45589 [2021-11-03 04:14:34,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 969 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-03 04:14:34,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45589 states. [2021-11-03 04:14:35,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45589 to 12435. [2021-11-03 04:14:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12435 states, 12434 states have (on average 1.3899790895930513) internal successors, (17283), 12434 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:35,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12435 states to 12435 states and 17283 transitions. [2021-11-03 04:14:35,687 INFO L78 Accepts]: Start accepts. Automaton has 12435 states and 17283 transitions. Word has length 245 [2021-11-03 04:14:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:35,687 INFO L470 AbstractCegarLoop]: Abstraction has 12435 states and 17283 transitions. [2021-11-03 04:14:35,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:35,688 INFO L276 IsEmpty]: Start isEmpty. Operand 12435 states and 17283 transitions. [2021-11-03 04:14:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-03 04:14:35,708 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:35,708 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:14:35,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:35,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:36,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:14:36,133 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:14:36,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:36,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1886021345, now seen corresponding path program 1 times [2021-11-03 04:14:36,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:36,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114676078] [2021-11-03 04:14:36,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:36,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:36,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:36,138 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:36,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:14:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:41,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 2844 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:14:41,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:14:42,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:14:44,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:44,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114676078] [2021-11-03 04:14:44,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114676078] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:44,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2021528632] [2021-11-03 04:14:44,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:44,444 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:14:44,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:14:44,445 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:14:44,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-03 04:14:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:48,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 2844 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:14:48,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:14:49,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:14:50,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2021528632] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:14:50,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:14:50,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-03 04:14:50,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809133643] [2021-11-03 04:14:50,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:14:50,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:50,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:14:50,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:14:50,056 INFO L87 Difference]: Start difference. First operand 12435 states and 17283 transitions. Second operand has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:00,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:00,557 INFO L93 Difference]: Finished difference Result 99039 states and 138069 transitions. [2021-11-03 04:15:00,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:15:00,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 states have internal predecessors, (235), 0 states have call successors, (0), 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 245 [2021-11-03 04:15:00,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:00,703 INFO L225 Difference]: With dead ends: 99039 [2021-11-03 04:15:00,703 INFO L226 Difference]: Without dead ends: 86689 [2021-11-03 04:15:00,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 987 GetRequests, 971 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-03 04:15:00,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86689 states. [2021-11-03 04:15:02,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86689 to 12447. [2021-11-03 04:15:02,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12447 states, 12446 states have (on average 1.3892816969307409) internal successors, (17291), 12446 states have internal predecessors, (17291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12447 states to 12447 states and 17291 transitions. [2021-11-03 04:15:02,512 INFO L78 Accepts]: Start accepts. Automaton has 12447 states and 17291 transitions. Word has length 245 [2021-11-03 04:15:02,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:02,512 INFO L470 AbstractCegarLoop]: Abstraction has 12447 states and 17291 transitions. [2021-11-03 04:15:02,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:02,513 INFO L276 IsEmpty]: Start isEmpty. Operand 12447 states and 17291 transitions. [2021-11-03 04:15:02,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-03 04:15:02,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:02,529 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:15:02,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:15:02,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:15:02,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:15:02,941 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:02,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:02,942 INFO L85 PathProgramCache]: Analyzing trace with hash 513697158, now seen corresponding path program 1 times [2021-11-03 04:15:02,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:15:02,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421426022] [2021-11-03 04:15:02,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:02,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:15:02,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:15:02,946 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:15:02,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:15:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:08,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 2995 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:15:08,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:15:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:15:10,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:15:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:15:11,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:15:11,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421426022] [2021-11-03 04:15:11,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421426022] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:15:11,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [109201715] [2021-11-03 04:15:11,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:11,978 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:15:11,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:15:11,987 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:15:11,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 04:15:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:16,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 2995 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:15:16,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:15:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:15:17,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:15:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:15:18,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [109201715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:15:18,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:15:18,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-03 04:15:18,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524522250] [2021-11-03 04:15:18,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:15:18,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:15:18,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:15:18,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:15:18,098 INFO L87 Difference]: Start difference. First operand 12447 states and 17291 transitions. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:24,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:24,880 INFO L93 Difference]: Finished difference Result 59567 states and 82919 transitions. [2021-11-03 04:15:24,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:15:24,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 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 266 [2021-11-03 04:15:24,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:24,944 INFO L225 Difference]: With dead ends: 59567 [2021-11-03 04:15:24,944 INFO L226 Difference]: Without dead ends: 47205 [2021-11-03 04:15:24,958 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 1053 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-03 04:15:24,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47205 states. [2021-11-03 04:15:26,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47205 to 12455. [2021-11-03 04:15:26,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12455 states, 12454 states have (on average 1.389031636422033) internal successors, (17299), 12454 states have internal predecessors, (17299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:26,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12455 states to 12455 states and 17299 transitions. [2021-11-03 04:15:26,621 INFO L78 Accepts]: Start accepts. Automaton has 12455 states and 17299 transitions. Word has length 266 [2021-11-03 04:15:26,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:26,621 INFO L470 AbstractCegarLoop]: Abstraction has 12455 states and 17299 transitions. [2021-11-03 04:15:26,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:26,622 INFO L276 IsEmpty]: Start isEmpty. Operand 12455 states and 17299 transitions. [2021-11-03 04:15:26,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-03 04:15:26,644 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:26,644 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:15:26,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:15:26,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:15:27,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:15:27,045 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:27,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:27,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1105976241, now seen corresponding path program 1 times [2021-11-03 04:15:27,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:15:27,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058035539] [2021-11-03 04:15:27,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:27,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:15:27,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:15:27,051 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:15:27,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 04:15:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:33,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 3045 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:15:33,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:15:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:15:35,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:15:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:15:37,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:15:37,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058035539] [2021-11-03 04:15:37,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058035539] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:15:37,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1320035877] [2021-11-03 04:15:37,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:37,070 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:15:37,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:15:37,071 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:15:37,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-03 04:15:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:42,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 3045 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:15:42,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:15:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:15:42,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:15:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:15:43,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1320035877] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:15:43,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:15:43,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-03 04:15:43,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80435831] [2021-11-03 04:15:43,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:15:43,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:15:43,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:15:43,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-03 04:15:43,541 INFO L87 Difference]: Start difference. First operand 12455 states and 17299 transitions. Second operand has 5 states, 5 states have (on average 52.4) internal successors, (262), 5 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:55,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:55,183 INFO L93 Difference]: Finished difference Result 59659 states and 83027 transitions. [2021-11-03 04:15:55,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:15:55,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.4) internal successors, (262), 5 states have internal predecessors, (262), 0 states have call successors, (0), 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 272 [2021-11-03 04:15:55,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:55,258 INFO L225 Difference]: With dead ends: 59659 [2021-11-03 04:15:55,258 INFO L226 Difference]: Without dead ends: 47289 [2021-11-03 04:15:55,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1090 GetRequests, 1077 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:15:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47289 states. [2021-11-03 04:15:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47289 to 12463. [2021-11-03 04:15:56,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12463 states, 12462 states have (on average 1.3887818969667791) internal successors, (17307), 12462 states have internal predecessors, (17307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:56,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12463 states to 12463 states and 17307 transitions. [2021-11-03 04:15:56,976 INFO L78 Accepts]: Start accepts. Automaton has 12463 states and 17307 transitions. Word has length 272 [2021-11-03 04:15:56,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:56,977 INFO L470 AbstractCegarLoop]: Abstraction has 12463 states and 17307 transitions. [2021-11-03 04:15:56,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.4) internal successors, (262), 5 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:56,977 INFO L276 IsEmpty]: Start isEmpty. Operand 12463 states and 17307 transitions. [2021-11-03 04:15:56,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-03 04:15:56,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:56,988 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:15:57,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-03 04:15:57,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:15:57,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:15:57,389 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:57,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:57,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1600643153, now seen corresponding path program 1 times [2021-11-03 04:15:57,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:15:57,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814162082] [2021-11-03 04:15:57,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:57,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:15:57,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:15:57,394 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:15:57,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 04:16:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:03,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 3043 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:16:03,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:16:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:16:05,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:16:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:16:06,946 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:16:06,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814162082] [2021-11-03 04:16:06,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814162082] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:16:06,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [551546952] [2021-11-03 04:16:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:06,948 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:16:06,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:16:06,949 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:16:06,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-03 04:16:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:12,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 3043 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 04:16:12,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:16:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:16:14,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:16:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:16:15,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [551546952] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:16:15,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:16:15,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [5, 5] total 15 [2021-11-03 04:16:15,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356583192] [2021-11-03 04:16:15,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 04:16:15,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:16:15,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 04:16:15,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:16:15,897 INFO L87 Difference]: Start difference. First operand 12463 states and 17307 transitions. Second operand has 9 states, 9 states have (on average 36.44444444444444) internal successors, (328), 9 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:16:24,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:16:24,177 INFO L93 Difference]: Finished difference Result 70207 states and 97732 transitions. [2021-11-03 04:16:24,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:16:24,178 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 36.44444444444444) internal successors, (328), 9 states have internal predecessors, (328), 0 states have call successors, (0), 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 272 [2021-11-03 04:16:24,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:16:24,276 INFO L225 Difference]: With dead ends: 70207 [2021-11-03 04:16:24,276 INFO L226 Difference]: Without dead ends: 57829 [2021-11-03 04:16:24,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1092 GetRequests, 1075 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-11-03 04:16:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57829 states. [2021-11-03 04:16:26,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57829 to 12475. [2021-11-03 04:16:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12475 states, 12474 states have (on average 1.3884078884078883) internal successors, (17319), 12474 states have internal predecessors, (17319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:16:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12475 states to 12475 states and 17319 transitions. [2021-11-03 04:16:26,550 INFO L78 Accepts]: Start accepts. Automaton has 12475 states and 17319 transitions. Word has length 272 [2021-11-03 04:16:26,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:16:26,551 INFO L470 AbstractCegarLoop]: Abstraction has 12475 states and 17319 transitions. [2021-11-03 04:16:26,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 36.44444444444444) internal successors, (328), 9 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:16:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 12475 states and 17319 transitions. [2021-11-03 04:16:26,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-03 04:16:26,562 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:16:26,562 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:16:26,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-03 04:16:26,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-03 04:16:26,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:16:26,965 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:16:26,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:16:26,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1521228563, now seen corresponding path program 1 times [2021-11-03 04:16:26,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:16:26,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054882742] [2021-11-03 04:16:26,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:26,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:16:26,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:16:26,970 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:16:26,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 04:16:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:33,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 3054 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:16:33,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:16:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:16:34,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:16:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:16:36,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:16:36,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054882742] [2021-11-03 04:16:36,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054882742] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:16:36,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [427487056] [2021-11-03 04:16:36,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:36,483 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:16:36,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:16:36,509 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:16:36,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-03 04:16:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:42,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 3054 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:16:42,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:16:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:16:43,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:16:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:16:44,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [427487056] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:16:44,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:16:44,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-03 04:16:44,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558124517] [2021-11-03 04:16:44,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:16:44,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:16:44,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:16:44,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:16:44,409 INFO L87 Difference]: Start difference. First operand 12475 states and 17319 transitions. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:16:48,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:16:48,506 INFO L93 Difference]: Finished difference Result 33091 states and 46047 transitions. [2021-11-03 04:16:48,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:16:48,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 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 274 [2021-11-03 04:16:48,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:16:48,535 INFO L225 Difference]: With dead ends: 33091 [2021-11-03 04:16:48,535 INFO L226 Difference]: Without dead ends: 20701 [2021-11-03 04:16:48,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1092 GetRequests, 1084 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:16:48,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20701 states. [2021-11-03 04:16:50,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20701 to 12091. [2021-11-03 04:16:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12091 states, 12090 states have (on average 1.3795698924731183) internal successors, (16679), 12090 states have internal predecessors, (16679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:16:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12091 states to 12091 states and 16679 transitions. [2021-11-03 04:16:50,276 INFO L78 Accepts]: Start accepts. Automaton has 12091 states and 16679 transitions. Word has length 274 [2021-11-03 04:16:50,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:16:50,277 INFO L470 AbstractCegarLoop]: Abstraction has 12091 states and 16679 transitions. [2021-11-03 04:16:50,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:16:50,277 INFO L276 IsEmpty]: Start isEmpty. Operand 12091 states and 16679 transitions. [2021-11-03 04:16:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-03 04:16:50,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:16:50,285 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:16:50,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-03 04:16:50,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-03 04:16:50,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:16:50,686 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:16:50,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:16:50,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2095948623, now seen corresponding path program 1 times [2021-11-03 04:16:50,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:16:50,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [942879707] [2021-11-03 04:16:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:50,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:16:50,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:16:50,690 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:16:50,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-03 04:16:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:57,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 3060 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:16:57,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:16:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:16:59,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:17:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:17:00,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:17:00,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [942879707] [2021-11-03 04:17:00,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [942879707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:17:00,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [66626483] [2021-11-03 04:17:00,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:17:00,895 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:17:00,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:17:00,896 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:17:00,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-03 04:17:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:17:09,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 3060 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:17:09,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:17:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:17:11,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:17:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-03 04:17:12,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [66626483] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:17:12,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186681900] [2021-11-03 04:17:12,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:17:12,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:17:12,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:17:12,665 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:17:12,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-03 04:17:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:17:18,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 3060 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:17:18,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:17:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:17:19,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:17:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:17:20,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186681900] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:17:20,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-03 04:17:20,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-03 04:17:20,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640519549] [2021-11-03 04:17:20,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:17:20,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:17:20,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:17:20,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:17:20,162 INFO L87 Difference]: Start difference. First operand 12091 states and 16679 transitions. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:17:24,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:17:24,085 INFO L93 Difference]: Finished difference Result 24101 states and 33276 transitions. [2021-11-03 04:17:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:17:24,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 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 276 [2021-11-03 04:17:24,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:17:24,101 INFO L225 Difference]: With dead ends: 24101 [2021-11-03 04:17:24,101 INFO L226 Difference]: Without dead ends: 12095 [2021-11-03 04:17:24,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1650 GetRequests, 1642 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:17:24,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12095 states. [2021-11-03 04:17:26,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12095 to 12095. [2021-11-03 04:17:26,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12095 states, 12094 states have (on average 1.379444352571523) internal successors, (16683), 12094 states have internal predecessors, (16683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:17:26,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12095 states to 12095 states and 16683 transitions. [2021-11-03 04:17:26,088 INFO L78 Accepts]: Start accepts. Automaton has 12095 states and 16683 transitions. Word has length 276 [2021-11-03 04:17:26,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:17:26,088 INFO L470 AbstractCegarLoop]: Abstraction has 12095 states and 16683 transitions. [2021-11-03 04:17:26,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:17:26,089 INFO L276 IsEmpty]: Start isEmpty. Operand 12095 states and 16683 transitions. [2021-11-03 04:17:26,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-11-03 04:17:26,097 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:17:26,097 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:17:26,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-03 04:17:26,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-03 04:17:26,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-03 04:17:26,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:17:26,699 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:17:26,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:17:26,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1201292641, now seen corresponding path program 1 times [2021-11-03 04:17:26,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:17:26,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845882991] [2021-11-03 04:17:26,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:17:26,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:17:26,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:17:26,704 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:17:26,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-03 04:17:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:17:33,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 3096 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:17:33,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:17:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-03 04:17:35,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:17:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-03 04:17:37,061 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:17:37,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845882991] [2021-11-03 04:17:37,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845882991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:17:37,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1277709737] [2021-11-03 04:17:37,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:17:37,062 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:17:37,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:17:37,063 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:17:37,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-03 04:17:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:17:47,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 3096 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:17:47,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:17:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-03 04:17:48,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:17:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-03 04:17:49,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1277709737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:17:49,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383692688] [2021-11-03 04:17:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:17:49,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:17:49,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:17:49,857 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:17:49,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-03 04:17:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:17:55,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 3096 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:17:55,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:17:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-03 04:17:56,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:17:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-03 04:17:57,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383692688] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:17:57,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-03 04:17:57,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-03 04:17:57,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104130927] [2021-11-03 04:17:57,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:17:57,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:17:57,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:17:57,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:17:57,811 INFO L87 Difference]: Start difference. First operand 12095 states and 16683 transitions. Second operand has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:18:02,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:18:02,620 INFO L93 Difference]: Finished difference Result 29804 states and 41154 transitions. [2021-11-03 04:18:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:18:02,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 0 states have call successors, (0), 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 277 [2021-11-03 04:18:02,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:18:02,649 INFO L225 Difference]: With dead ends: 29804 [2021-11-03 04:18:02,649 INFO L226 Difference]: Without dead ends: 17794 [2021-11-03 04:18:02,667 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1656 GetRequests, 1646 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:18:02,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17794 states. [2021-11-03 04:18:04,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17794 to 12099. [2021-11-03 04:18:04,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12099 states, 12098 states have (on average 1.3793188956852371) internal successors, (16687), 12098 states have internal predecessors, (16687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:18:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12099 states to 12099 states and 16687 transitions. [2021-11-03 04:18:04,623 INFO L78 Accepts]: Start accepts. Automaton has 12099 states and 16687 transitions. Word has length 277 [2021-11-03 04:18:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:18:04,623 INFO L470 AbstractCegarLoop]: Abstraction has 12099 states and 16687 transitions. [2021-11-03 04:18:04,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:18:04,624 INFO L276 IsEmpty]: Start isEmpty. Operand 12099 states and 16687 transitions. [2021-11-03 04:18:04,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-03 04:18:04,637 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:18:04,637 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:18:04,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-03 04:18:04,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-03 04:18:05,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-03 04:18:05,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:18:05,242 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:18:05,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:18:05,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1951435439, now seen corresponding path program 1 times [2021-11-03 04:18:05,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:18:05,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282162838] [2021-11-03 04:18:05,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:18:05,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:18:05,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:18:05,247 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:18:05,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-03 04:18:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:18:13,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 3103 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:18:13,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:18:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-03 04:18:14,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:18:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-03 04:18:16,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:18:16,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282162838] [2021-11-03 04:18:16,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282162838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:18:16,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [122093354] [2021-11-03 04:18:16,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:18:16,268 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:18:16,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:18:16,269 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:18:16,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-03 04:18:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:18:25,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 3103 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:18:25,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:18:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-03 04:18:27,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:18:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-03 04:18:28,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [122093354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:18:28,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946163160] [2021-11-03 04:18:28,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:18:28,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:18:28,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:18:28,774 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:18:28,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-03 04:18:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:18:36,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 3103 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:18:36,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:18:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-03 04:18:38,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:18:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-03 04:18:39,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946163160] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:18:39,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:18:39,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 10 [2021-11-03 04:18:39,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742406559] [2021-11-03 04:18:39,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:18:39,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:18:39,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:18:39,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:18:39,519 INFO L87 Difference]: Start difference. First operand 12099 states and 16687 transitions. Second operand has 10 states, 10 states have (on average 27.6) internal successors, (276), 10 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:18:43,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:18:43,390 INFO L93 Difference]: Finished difference Result 24156 states and 33355 transitions. [2021-11-03 04:18:43,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:18:43,391 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.6) internal successors, (276), 10 states have internal predecessors, (276), 0 states have call successors, (0), 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 278 [2021-11-03 04:18:43,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:18:43,405 INFO L225 Difference]: With dead ends: 24156 [2021-11-03 04:18:43,405 INFO L226 Difference]: Without dead ends: 12123 [2021-11-03 04:18:43,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1664 GetRequests, 1654 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:18:43,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12123 states. [2021-11-03 04:18:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12123 to 12123. [2021-11-03 04:18:45,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12123 states, 12122 states have (on average 1.3785678930869494) internal successors, (16711), 12122 states have internal predecessors, (16711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:18:45,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12123 states to 12123 states and 16711 transitions. [2021-11-03 04:18:45,025 INFO L78 Accepts]: Start accepts. Automaton has 12123 states and 16711 transitions. Word has length 278 [2021-11-03 04:18:45,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:18:45,025 INFO L470 AbstractCegarLoop]: Abstraction has 12123 states and 16711 transitions. [2021-11-03 04:18:45,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.6) internal successors, (276), 10 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:18:45,026 INFO L276 IsEmpty]: Start isEmpty. Operand 12123 states and 16711 transitions. [2021-11-03 04:18:45,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-11-03 04:18:45,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:18:45,035 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:18:45,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-03 04:18:45,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-03 04:18:45,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2021-11-03 04:18:45,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:18:45,636 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:18:45,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:18:45,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1035921007, now seen corresponding path program 2 times [2021-11-03 04:18:45,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:18:45,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271983007] [2021-11-03 04:18:45,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:18:45,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:18:45,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:18:45,640 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:18:45,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de1fa13-ac6c-47de-bc4f-59f51b70d1d8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process