./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4b03525ec5447375a01688a728ac5f10add5f84664db60bd75967c00682bdc6d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:07:41,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:07:41,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:07:42,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:07:42,054 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:07:42,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:07:42,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:07:42,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:07:42,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:07:42,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:07:42,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:07:42,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:07:42,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:07:42,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:07:42,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:07:42,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:07:42,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:07:42,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:07:42,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:07:42,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:07:42,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:07:42,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:07:42,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:07:42,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:07:42,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:07:42,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:07:42,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:07:42,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:07:42,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:07:42,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:07:42,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:07:42,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:07:42,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:07:42,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:07:42,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:07:42,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:07:42,113 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:07:42,113 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:07:42,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:07:42,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:07:42,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:07:42,133 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:07:42,194 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:07:42,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:07:42,197 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:07:42,197 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:07:42,197 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:07:42,198 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:07:42,198 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:07:42,198 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:07:42,199 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:07:42,199 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:07:42,200 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:07:42,201 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:07:42,201 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:07:42,201 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:07:42,202 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:07:42,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:07:42,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:07:42,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:07:42,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:07:42,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:07:42,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:07:42,204 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:07:42,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:07:42,205 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:07:42,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:07:42,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:07:42,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:07:42,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:07:42,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:07:42,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:07:42,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:07:42,207 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:07:42,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:07:42,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:07:42,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:07:42,209 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:07:42,209 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_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b03525ec5447375a01688a728ac5f10add5f84664db60bd75967c00682bdc6d [2021-11-07 01:07:42,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:07:42,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:07:42,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:07:42,592 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:07:42,593 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:07:42,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 01:07:42,689 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/data/1fb063577/d3c35ea9787347d5a5ca48cc51c747b5/FLAG02ea2e0ac [2021-11-07 01:07:43,660 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:07:43,660 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 01:07:43,725 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/data/1fb063577/d3c35ea9787347d5a5ca48cc51c747b5/FLAG02ea2e0ac [2021-11-07 01:07:44,117 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/data/1fb063577/d3c35ea9787347d5a5ca48cc51c747b5 [2021-11-07 01:07:44,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:07:44,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:07:44,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:07:44,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:07:44,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:07:44,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:07:44" (1/1) ... [2021-11-07 01:07:44,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48fe0d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:07:44, skipping insertion in model container [2021-11-07 01:07:44,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:07:44" (1/1) ... [2021-11-07 01:07:44,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:07:44,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:07:45,703 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:45,729 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:45,757 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:45,812 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:45,821 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:45,826 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:45,832 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:45,839 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:45,849 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:45,856 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:45,865 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:45,943 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:45,955 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:45,974 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:45,975 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:45,999 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,001 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,075 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,121 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,145 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,151 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,152 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,179 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,179 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,182 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,183 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,184 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,184 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,185 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,187 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,188 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,194 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,194 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,195 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:07:46,233 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_99341fb1-7b1f-46e9-905e-60fb13ae4900/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i[212825,212838] [2021-11-07 01:07:46,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:07:46,435 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:07:46,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6ac4a16f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:07:46, skipping insertion in model container [2021-11-07 01:07:46,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:07:46,436 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:07:46,439 INFO L168 Benchmark]: Toolchain (without parser) took 2315.55 ms. Allocated memory was 111.1 MB in the beginning and 155.2 MB in the end (delta: 44.0 MB). Free memory was 66.3 MB in the beginning and 85.3 MB in the end (delta: -19.0 MB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:07:46,440 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 111.1 MB. Free memory was 82.0 MB in the beginning and 81.9 MB in the end (delta: 30.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:07:46,441 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2307.77 ms. Allocated memory was 111.1 MB in the beginning and 155.2 MB in the end (delta: 44.0 MB). Free memory was 66.1 MB in the beginning and 85.3 MB in the end (delta: -19.2 MB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:07:46,444 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 111.1 MB. Free memory was 82.0 MB in the beginning and 81.9 MB in the end (delta: 30.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2307.77 ms. Allocated memory was 111.1 MB in the beginning and 155.2 MB in the end (delta: 44.0 MB). Free memory was 66.1 MB in the beginning and 85.3 MB in the end (delta: -19.2 MB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3672]: 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_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4b03525ec5447375a01688a728ac5f10add5f84664db60bd75967c00682bdc6d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:07:48,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:07:48,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:07:48,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:07:48,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:07:48,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:07:48,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:07:48,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:07:48,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:07:48,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:07:48,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:07:48,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:07:48,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:07:48,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:07:48,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:07:48,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:07:48,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:07:48,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:07:48,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:07:48,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:07:48,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:07:48,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:07:48,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:07:48,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:07:48,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:07:48,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:07:48,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:07:48,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:07:48,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:07:48,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:07:48,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:07:48,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:07:48,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:07:48,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:07:48,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:07:48,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:07:48,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:07:48,851 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:07:48,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:07:48,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:07:48,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:07:48,855 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:07:48,880 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:07:48,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:07:48,882 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:07:48,882 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:07:48,882 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:07:48,883 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:07:48,883 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:07:48,883 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:07:48,884 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:07:48,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:07:48,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:07:48,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:07:48,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:07:48,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:07:48,886 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:07:48,886 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:07:48,886 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:07:48,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:07:48,887 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:07:48,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:07:48,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:07:48,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:07:48,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:07:48,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:07:48,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:07:48,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:07:48,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:07:48,889 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:07:48,889 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:07:48,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:07:48,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:07:48,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:07:48,890 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_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b03525ec5447375a01688a728ac5f10add5f84664db60bd75967c00682bdc6d [2021-11-07 01:07:49,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:07:49,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:07:49,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:07:49,339 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:07:49,340 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:07:49,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 01:07:49,417 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/data/588846155/9c9292eace27417f9580506c4cac6475/FLAG52d444a55 [2021-11-07 01:07:50,447 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:07:50,449 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 01:07:50,497 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/data/588846155/9c9292eace27417f9580506c4cac6475/FLAG52d444a55 [2021-11-07 01:07:50,822 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/data/588846155/9c9292eace27417f9580506c4cac6475 [2021-11-07 01:07:50,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:07:50,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:07:50,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:07:50,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:07:50,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:07:50,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:07:50" (1/1) ... [2021-11-07 01:07:50,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72e97175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:07:50, skipping insertion in model container [2021-11-07 01:07:50,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:07:50" (1/1) ... [2021-11-07 01:07:50,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:07:50,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:07:52,749 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_99341fb1-7b1f-46e9-905e-60fb13ae4900/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i[212825,212838] [2021-11-07 01:07:52,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:07:52,967 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:07:53,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:07:53,406 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_99341fb1-7b1f-46e9-905e-60fb13ae4900/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i[212825,212838] [2021-11-07 01:07:53,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:07:53,460 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:07:53,909 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_99341fb1-7b1f-46e9-905e-60fb13ae4900/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i[212825,212838] [2021-11-07 01:07:53,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:07:54,140 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:07:54,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:07:54 WrapperNode [2021-11-07 01:07:54,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:07:54,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:07:54,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:07:54,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:07:54,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:07:54" (1/1) ... [2021-11-07 01:07:54,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:07:54" (1/1) ... [2021-11-07 01:07:54,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:07:54,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:07:54,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:07:54,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:07:54,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:07:54" (1/1) ... [2021-11-07 01:07:54,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:07:54" (1/1) ... [2021-11-07 01:07:54,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:07:54" (1/1) ... [2021-11-07 01:07:54,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:07:54" (1/1) ... [2021-11-07 01:07:55,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:07:54" (1/1) ... [2021-11-07 01:07:55,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:07:54" (1/1) ... [2021-11-07 01:07:55,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:07:54" (1/1) ... [2021-11-07 01:07:55,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:07:55,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:07:55,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:07:55,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:07:55,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:07:54" (1/1) ... [2021-11-07 01:07:55,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:07:55,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:07:55,486 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:07:55,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:07:55,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:07:55,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:07:55,549 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-07 01:07:55,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:07:55,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 01:07:55,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:07:55,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 01:07:55,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:07:55,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:07:55,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:07:55,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:07:55,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:07:55,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:07:55,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:07:55,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:07:55,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 01:07:55,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:07:55,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:07:55,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 01:07:55,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 01:07:55,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 01:07:55,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 01:07:55,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 01:07:55,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:07:55,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:07:55,555 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-07 01:07:55,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 01:07:55,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 01:07:55,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 01:07:55,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 01:07:55,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:07:55,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:11:05,853 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:11:05,853 INFO L299 CfgBuilder]: Removed 1764 assume(true) statements. [2021-11-07 01:11:05,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:11:05 BoogieIcfgContainer [2021-11-07 01:11:05,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:11:05,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:11:05,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:11:05,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:11:05,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:07:50" (1/3) ... [2021-11-07 01:11:05,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf3049f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:11:05, skipping insertion in model container [2021-11-07 01:11:05,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:07:54" (2/3) ... [2021-11-07 01:11:05,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf3049f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:11:05, skipping insertion in model container [2021-11-07 01:11:05,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:11:05" (3/3) ... [2021-11-07 01:11:05,869 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 01:11:05,876 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:11:05,877 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 71 error locations. [2021-11-07 01:11:05,961 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:11:05,969 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:11:05,969 INFO L340 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2021-11-07 01:11:06,039 INFO L276 IsEmpty]: Start isEmpty. Operand has 2037 states, 1965 states have (on average 1.4600508905852416) internal successors, (2869), 2036 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:06,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:11:06,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:06,057 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] [2021-11-07 01:11:06,058 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:11:06,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:06,070 INFO L85 PathProgramCache]: Analyzing trace with hash -107109679, now seen corresponding path program 1 times [2021-11-07 01:11:06,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:06,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543661617] [2021-11-07 01:11:06,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:06,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:06,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:06,110 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:06,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:11:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:21,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 3050 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:11:21,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:21,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:22,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:22,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543661617] [2021-11-07 01:11:22,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543661617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:22,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:22,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:11:22,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641790966] [2021-11-07 01:11:22,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:11:22,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:22,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:11:22,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:11:22,297 INFO L87 Difference]: Start difference. First operand has 2037 states, 1965 states have (on average 1.4600508905852416) internal successors, (2869), 2036 states have internal predecessors, (2869), 0 states have call successors, (0), 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 37.0) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:22,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:22,466 INFO L93 Difference]: Finished difference Result 4070 states and 5733 transitions. [2021-11-07 01:11:22,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:11:22,468 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-07 01:11:22,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:22,511 INFO L225 Difference]: With dead ends: 4070 [2021-11-07 01:11:22,511 INFO L226 Difference]: Without dead ends: 2026 [2021-11-07 01:11:22,524 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:11:22,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-11-07 01:11:22,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 2026. [2021-11-07 01:11:22,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 1955 states have (on average 1.3943734015345268) internal successors, (2726), 2025 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:22,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 2726 transitions. [2021-11-07 01:11:22,703 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 2726 transitions. Word has length 74 [2021-11-07 01:11:22,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:22,704 INFO L470 AbstractCegarLoop]: Abstraction has 2026 states and 2726 transitions. [2021-11-07 01:11:22,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:22,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 2726 transitions. [2021-11-07 01:11:22,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:11:22,717 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:22,718 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] [2021-11-07 01:11:22,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:22,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:22,934 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:11:22,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:22,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2011007137, now seen corresponding path program 1 times [2021-11-07 01:11:22,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:22,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061789293] [2021-11-07 01:11:22,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:22,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:22,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:22,954 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:22,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:11:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:38,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 3050 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:11:38,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:38,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:39,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:39,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061789293] [2021-11-07 01:11:39,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061789293] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:39,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:39,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:11:39,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227867329] [2021-11-07 01:11:39,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:39,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:39,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:39,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:39,224 INFO L87 Difference]: Start difference. First operand 2026 states and 2726 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:39,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:39,967 INFO L93 Difference]: Finished difference Result 4027 states and 5441 transitions. [2021-11-07 01:11:39,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:11:39,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 74 [2021-11-07 01:11:39,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:39,987 INFO L225 Difference]: With dead ends: 4027 [2021-11-07 01:11:39,987 INFO L226 Difference]: Without dead ends: 2041 [2021-11-07 01:11:39,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-11-07 01:11:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 2041. [2021-11-07 01:11:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 1970 states have (on average 1.3913705583756346) internal successors, (2741), 2040 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:40,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 2741 transitions. [2021-11-07 01:11:40,063 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 2741 transitions. Word has length 74 [2021-11-07 01:11:40,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:40,063 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 2741 transitions. [2021-11-07 01:11:40,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 2741 transitions. [2021-11-07 01:11:40,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:11:40,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:40,067 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:40,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:40,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:40,290 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:11:40,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:40,291 INFO L85 PathProgramCache]: Analyzing trace with hash 13349022, now seen corresponding path program 1 times [2021-11-07 01:11:40,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:40,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816999315] [2021-11-07 01:11:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:40,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:40,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:40,315 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:40,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:11:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:55,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 3125 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:11:55,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:11:56,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:11:57,814 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:57,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816999315] [2021-11-07 01:11:57,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816999315] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:11:57,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [73148425] [2021-11-07 01:11:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:57,815 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:57,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:11:57,824 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:11:57,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 01:12:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:01,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 3125 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:12:01,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:12:01,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:12:02,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [73148425] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:02,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:12:02,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:12:02,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283928202] [2021-11-07 01:12:02,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:12:02,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:02,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:12:02,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:12:02,109 INFO L87 Difference]: Start difference. First operand 2041 states and 2741 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:06,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:06,123 INFO L93 Difference]: Finished difference Result 5435 states and 7318 transitions. [2021-11-07 01:12:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:12:06,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-07 01:12:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:06,150 INFO L225 Difference]: With dead ends: 5435 [2021-11-07 01:12:06,150 INFO L226 Difference]: Without dead ends: 3475 [2021-11-07 01:12:06,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:12:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3475 states. [2021-11-07 01:12:06,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3475 to 3339. [2021-11-07 01:12:06,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3339 states, 3268 states have (on average 1.401468788249694) internal successors, (4580), 3338 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:06,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3339 states to 3339 states and 4580 transitions. [2021-11-07 01:12:06,290 INFO L78 Accepts]: Start accepts. Automaton has 3339 states and 4580 transitions. Word has length 89 [2021-11-07 01:12:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:06,291 INFO L470 AbstractCegarLoop]: Abstraction has 3339 states and 4580 transitions. [2021-11-07 01:12:06,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:06,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3339 states and 4580 transitions. [2021-11-07 01:12:06,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:12:06,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:06,294 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:06,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:06,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:06,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:06,714 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:12:06,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:06,715 INFO L85 PathProgramCache]: Analyzing trace with hash -2019292678, now seen corresponding path program 1 times [2021-11-07 01:12:06,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:06,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742403947] [2021-11-07 01:12:06,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:06,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:06,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:06,731 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:06,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:12:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:22,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 3100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:12:22,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:12:23,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:12:24,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:24,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742403947] [2021-11-07 01:12:24,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742403947] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:12:24,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [684011009] [2021-11-07 01:12:24,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:24,076 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:12:24,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:12:24,090 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:12:24,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-07 01:12:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:27,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 3100 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:12:27,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:12:28,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:12:28,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [684011009] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:28,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:12:28,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:12:28,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528476246] [2021-11-07 01:12:28,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:12:28,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:28,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:12:28,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:12:28,458 INFO L87 Difference]: Start difference. First operand 3339 states and 4580 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:29,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:29,371 INFO L93 Difference]: Finished difference Result 8383 states and 11568 transitions. [2021-11-07 01:12:29,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:12:29,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 90 [2021-11-07 01:12:29,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:29,412 INFO L225 Difference]: With dead ends: 8383 [2021-11-07 01:12:29,413 INFO L226 Difference]: Without dead ends: 5125 [2021-11-07 01:12:29,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:12:29,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5125 states. [2021-11-07 01:12:29,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5125 to 5021. [2021-11-07 01:12:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5021 states, 4950 states have (on average 1.417979797979798) internal successors, (7019), 5020 states have internal predecessors, (7019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:29,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5021 states to 5021 states and 7019 transitions. [2021-11-07 01:12:29,677 INFO L78 Accepts]: Start accepts. Automaton has 5021 states and 7019 transitions. Word has length 90 [2021-11-07 01:12:29,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:29,678 INFO L470 AbstractCegarLoop]: Abstraction has 5021 states and 7019 transitions. [2021-11-07 01:12:29,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:29,679 INFO L276 IsEmpty]: Start isEmpty. Operand 5021 states and 7019 transitions. [2021-11-07 01:12:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 01:12:29,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:29,688 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:29,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:29,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:30,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:30,102 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr68ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:12:30,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:30,103 INFO L85 PathProgramCache]: Analyzing trace with hash -299745556, now seen corresponding path program 1 times [2021-11-07 01:12:30,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:30,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5853885] [2021-11-07 01:12:30,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:30,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:30,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:30,111 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:30,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:12:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:45,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 3094 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:12:45,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:12:46,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:12:47,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:47,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5853885] [2021-11-07 01:12:47,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5853885] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:12:47,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2064079089] [2021-11-07 01:12:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:47,155 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:12:47,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:12:47,157 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:12:47,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 01:12:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:50,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 3094 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:12:50,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:12:52,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:12:53,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2064079089] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:53,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:12:53,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:12:53,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80554107] [2021-11-07 01:12:53,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:12:53,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:53,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:12:53,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:12:53,109 INFO L87 Difference]: Start difference. First operand 5021 states and 7019 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:53,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:53,383 INFO L93 Difference]: Finished difference Result 5021 states and 7019 transitions. [2021-11-07 01:12:53,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:12:53,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 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 93 [2021-11-07 01:12:53,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:53,419 INFO L225 Difference]: With dead ends: 5021 [2021-11-07 01:12:53,420 INFO L226 Difference]: Without dead ends: 5009 [2021-11-07 01:12:53,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:12:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5009 states. [2021-11-07 01:12:53,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5009 to 5009. [2021-11-07 01:12:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5009 states, 4944 states have (on average 1.4158576051779934) internal successors, (7000), 5008 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:53,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5009 states to 5009 states and 7000 transitions. [2021-11-07 01:12:53,647 INFO L78 Accepts]: Start accepts. Automaton has 5009 states and 7000 transitions. Word has length 93 [2021-11-07 01:12:53,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:53,652 INFO L470 AbstractCegarLoop]: Abstraction has 5009 states and 7000 transitions. [2021-11-07 01:12:53,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:53,653 INFO L276 IsEmpty]: Start isEmpty. Operand 5009 states and 7000 transitions. [2021-11-07 01:12:53,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:12:53,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:53,655 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:53,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:53,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:54,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:12:54,070 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr69ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:12:54,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:54,070 INFO L85 PathProgramCache]: Analyzing trace with hash -702164839, now seen corresponding path program 1 times [2021-11-07 01:12:54,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:54,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275674710] [2021-11-07 01:12:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:54,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:54,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:54,081 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:54,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:13:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:09,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 3095 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:13:09,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:13:10,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:13:11,174 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:11,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275674710] [2021-11-07 01:13:11,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275674710] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:11,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [776390243] [2021-11-07 01:13:11,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:11,175 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:13:11,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:13:11,190 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:13:11,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 01:13:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:15,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 3095 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:13:15,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:13:16,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:13:17,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [776390243] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:17,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:13:17,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:13:17,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120231267] [2021-11-07 01:13:17,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:13:17,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:17,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:13:17,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:13:17,356 INFO L87 Difference]: Start difference. First operand 5009 states and 7000 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:18,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:18,325 INFO L93 Difference]: Finished difference Result 10866 states and 15238 transitions. [2021-11-07 01:13:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:18,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-07 01:13:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:18,366 INFO L225 Difference]: With dead ends: 10866 [2021-11-07 01:13:18,366 INFO L226 Difference]: Without dead ends: 5938 [2021-11-07 01:13:18,376 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:13:18,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5938 states. [2021-11-07 01:13:18,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5938 to 5908. [2021-11-07 01:13:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5908 states, 5853 states have (on average 1.4033828805740647) internal successors, (8214), 5907 states have internal predecessors, (8214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5908 states to 5908 states and 8214 transitions. [2021-11-07 01:13:18,663 INFO L78 Accepts]: Start accepts. Automaton has 5908 states and 8214 transitions. Word has length 94 [2021-11-07 01:13:18,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:18,664 INFO L470 AbstractCegarLoop]: Abstraction has 5908 states and 8214 transitions. [2021-11-07 01:13:18,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:18,665 INFO L276 IsEmpty]: Start isEmpty. Operand 5908 states and 8214 transitions. [2021-11-07 01:13:18,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 01:13:18,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:18,671 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:18,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:18,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:19,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:13:19,098 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr70ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:13:19,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:19,098 INFO L85 PathProgramCache]: Analyzing trace with hash -292260714, now seen corresponding path program 1 times [2021-11-07 01:13:19,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:19,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266533613] [2021-11-07 01:13:19,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:19,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:19,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:19,109 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:19,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:13:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:34,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 3096 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:13:34,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:13:35,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:13:36,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:36,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266533613] [2021-11-07 01:13:36,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266533613] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:36,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [974888946] [2021-11-07 01:13:36,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:36,439 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:13:36,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:13:36,440 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:13:36,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 01:13:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:40,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 3096 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:13:40,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:13:41,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:13:42,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [974888946] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:42,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:13:42,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:13:42,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298517540] [2021-11-07 01:13:42,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:13:42,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:42,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:13:42,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:13:42,552 INFO L87 Difference]: Start difference. First operand 5908 states and 8214 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:42,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:42,664 INFO L93 Difference]: Finished difference Result 5908 states and 8214 transitions. [2021-11-07 01:13:42,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:42,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-07 01:13:42,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:42,699 INFO L225 Difference]: With dead ends: 5908 [2021-11-07 01:13:42,699 INFO L226 Difference]: Without dead ends: 5901 [2021-11-07 01:13:42,702 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:13:42,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5901 states. [2021-11-07 01:13:42,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5901 to 5901. [2021-11-07 01:13:42,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5901 states, 5847 states have (on average 1.4025996237386693) internal successors, (8201), 5900 states have internal predecessors, (8201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5901 states to 5901 states and 8201 transitions. [2021-11-07 01:13:42,966 INFO L78 Accepts]: Start accepts. Automaton has 5901 states and 8201 transitions. Word has length 95 [2021-11-07 01:13:42,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:42,967 INFO L470 AbstractCegarLoop]: Abstraction has 5901 states and 8201 transitions. [2021-11-07 01:13:42,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 5901 states and 8201 transitions. [2021-11-07 01:13:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 01:13:42,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:42,969 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:42,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:43,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:43,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:13:43,387 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:13:43,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:43,387 INFO L85 PathProgramCache]: Analyzing trace with hash 431941352, now seen corresponding path program 1 times [2021-11-07 01:13:43,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:43,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277396643] [2021-11-07 01:13:43,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:43,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:43,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:43,401 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:43,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:13:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:59,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 3139 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:13:59,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:14:00,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:14:00,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:00,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277396643] [2021-11-07 01:14:00,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277396643] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:00,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1200972733] [2021-11-07 01:14:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:00,869 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:00,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:14:00,870 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:14:00,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 01:14:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:04,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 3139 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:04,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:14:05,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:14:05,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1200972733] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:05,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:14:05,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:14:05,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975785110] [2021-11-07 01:14:05,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:05,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:05,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:05,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:14:05,684 INFO L87 Difference]: Start difference. First operand 5901 states and 8201 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:06,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:06,725 INFO L93 Difference]: Finished difference Result 16115 states and 22461 transitions. [2021-11-07 01:14:06,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:06,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 [2021-11-07 01:14:06,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:06,765 INFO L225 Difference]: With dead ends: 16115 [2021-11-07 01:14:06,766 INFO L226 Difference]: Without dead ends: 10295 [2021-11-07 01:14:06,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:14:06,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10295 states. [2021-11-07 01:14:07,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10295 to 10185. [2021-11-07 01:14:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10185 states, 10131 states have (on average 1.408054486230382) internal successors, (14265), 10184 states have internal predecessors, (14265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10185 states to 10185 states and 14265 transitions. [2021-11-07 01:14:07,204 INFO L78 Accepts]: Start accepts. Automaton has 10185 states and 14265 transitions. Word has length 101 [2021-11-07 01:14:07,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:07,205 INFO L470 AbstractCegarLoop]: Abstraction has 10185 states and 14265 transitions. [2021-11-07 01:14:07,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:07,205 INFO L276 IsEmpty]: Start isEmpty. Operand 10185 states and 14265 transitions. [2021-11-07 01:14:07,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 01:14:07,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:07,207 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:07,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:07,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:07,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:07,628 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:14:07,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:07,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1604070830, now seen corresponding path program 1 times [2021-11-07 01:14:07,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:07,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045228939] [2021-11-07 01:14:07,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:07,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:07,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:07,640 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:07,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:14:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:23,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 3171 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:14:23,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:14:24,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:14:24,924 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:24,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045228939] [2021-11-07 01:14:24,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045228939] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:24,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [614039784] [2021-11-07 01:14:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:24,925 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:24,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:14:24,926 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:14:24,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:14:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:29,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 3171 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:29,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:14:29,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:14:30,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [614039784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:30,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:14:30,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:14:30,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520890189] [2021-11-07 01:14:30,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:30,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:30,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:30,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:14:30,197 INFO L87 Difference]: Start difference. First operand 10185 states and 14265 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 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) [2021-11-07 01:14:31,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:31,296 INFO L93 Difference]: Finished difference Result 28933 states and 40520 transitions. [2021-11-07 01:14:31,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:31,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 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 102 [2021-11-07 01:14:31,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:31,355 INFO L225 Difference]: With dead ends: 28933 [2021-11-07 01:14:31,355 INFO L226 Difference]: Without dead ends: 18829 [2021-11-07 01:14:31,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:14:31,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18829 states. [2021-11-07 01:14:31,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18829 to 18669. [2021-11-07 01:14:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18669 states, 18615 states have (on average 1.4079505774912704) internal successors, (26209), 18668 states have internal predecessors, (26209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:32,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18669 states to 18669 states and 26209 transitions. [2021-11-07 01:14:32,057 INFO L78 Accepts]: Start accepts. Automaton has 18669 states and 26209 transitions. Word has length 102 [2021-11-07 01:14:32,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:32,058 INFO L470 AbstractCegarLoop]: Abstraction has 18669 states and 26209 transitions. [2021-11-07 01:14:32,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 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) [2021-11-07 01:14:32,058 INFO L276 IsEmpty]: Start isEmpty. Operand 18669 states and 26209 transitions. [2021-11-07 01:14:32,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 01:14:32,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:32,060 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:32,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:14:32,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:32,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:32,474 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr50ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:14:32,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:32,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1595950027, now seen corresponding path program 1 times [2021-11-07 01:14:32,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:32,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629075527] [2021-11-07 01:14:32,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:32,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:32,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:32,482 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:32,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:14:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:49,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 3172 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:14:49,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:14:49,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:14:50,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:50,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629075527] [2021-11-07 01:14:50,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629075527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:50,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1861122497] [2021-11-07 01:14:50,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:50,716 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:50,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:14:50,728 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:14:50,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:14:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:55,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 3172 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:55,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:14:55,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:14:55,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1861122497] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:55,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:14:55,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:14:55,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367040230] [2021-11-07 01:14:55,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:55,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:55,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:55,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:14:55,964 INFO L87 Difference]: Start difference. First operand 18669 states and 26209 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:57,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:57,450 INFO L93 Difference]: Finished difference Result 53335 states and 74918 transitions. [2021-11-07 01:14:57,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:57,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 103 [2021-11-07 01:14:57,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:57,546 INFO L225 Difference]: With dead ends: 53335 [2021-11-07 01:14:57,546 INFO L226 Difference]: Without dead ends: 34747 [2021-11-07 01:14:57,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:14:57,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34747 states. [2021-11-07 01:14:58,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34747 to 34605. [2021-11-07 01:14:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34605 states, 34551 states have (on average 1.4084975832826836) internal successors, (48665), 34604 states have internal predecessors, (48665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34605 states to 34605 states and 48665 transitions. [2021-11-07 01:14:58,690 INFO L78 Accepts]: Start accepts. Automaton has 34605 states and 48665 transitions. Word has length 103 [2021-11-07 01:14:58,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:58,691 INFO L470 AbstractCegarLoop]: Abstraction has 34605 states and 48665 transitions. [2021-11-07 01:14:58,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:58,691 INFO L276 IsEmpty]: Start isEmpty. Operand 34605 states and 48665 transitions. [2021-11-07 01:14:58,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 01:14:58,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:58,694 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:14:58,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:58,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:59,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:59,110 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:14:59,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:59,110 INFO L85 PathProgramCache]: Analyzing trace with hash -297820779, now seen corresponding path program 1 times [2021-11-07 01:14:59,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:59,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47018871] [2021-11-07 01:14:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:59,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:59,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:59,126 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:59,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:15:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:16,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 3291 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:15:16,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:15:16,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:15:18,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:18,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47018871] [2021-11-07 01:15:18,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47018871] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:18,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [463817595] [2021-11-07 01:15:18,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:18,094 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:15:18,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:15:18,096 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:15:18,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:15:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:22,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 3291 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:15:22,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:15:23,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:15:23,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [463817595] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:23,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:15:23,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:15:23,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126842371] [2021-11-07 01:15:23,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:15:23,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:23,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:15:23,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:15:23,720 INFO L87 Difference]: Start difference. First operand 34605 states and 48665 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:15:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:27,310 INFO L93 Difference]: Finished difference Result 69135 states and 97246 transitions. [2021-11-07 01:15:27,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:15:27,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 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 134 [2021-11-07 01:15:27,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:27,381 INFO L225 Difference]: With dead ends: 69135 [2021-11-07 01:15:27,381 INFO L226 Difference]: Without dead ends: 34595 [2021-11-07 01:15:27,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:15:27,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34595 states. [2021-11-07 01:15:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34595 to 34216. [2021-11-07 01:15:29,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34216 states, 34162 states have (on average 1.4109244189450267) internal successors, (48200), 34215 states have internal predecessors, (48200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:15:29,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34216 states to 34216 states and 48200 transitions. [2021-11-07 01:15:29,502 INFO L78 Accepts]: Start accepts. Automaton has 34216 states and 48200 transitions. Word has length 134 [2021-11-07 01:15:29,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:29,503 INFO L470 AbstractCegarLoop]: Abstraction has 34216 states and 48200 transitions. [2021-11-07 01:15:29,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:15:29,503 INFO L276 IsEmpty]: Start isEmpty. Operand 34216 states and 48200 transitions. [2021-11-07 01:15:29,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-07 01:15:29,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:29,507 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:15:29,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:29,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:29,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:29,923 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:15:29,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:29,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1973488558, now seen corresponding path program 1 times [2021-11-07 01:15:29,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:29,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146357011] [2021-11-07 01:15:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:29,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:29,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:29,933 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:29,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:15:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:47,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 3448 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:15:47,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:15:48,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:15:49,336 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:49,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146357011] [2021-11-07 01:15:49,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146357011] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:49,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1967547960] [2021-11-07 01:15:49,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:49,337 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:15:49,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:15:49,338 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:15:49,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:15:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:54,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 3448 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:15:54,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 01:15:54,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 01:15:55,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1967547960] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:55,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:15:55,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:15:55,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673849397] [2021-11-07 01:15:55,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:15:55,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:55,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:15:55,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:15:55,134 INFO L87 Difference]: Start difference. First operand 34216 states and 48200 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:15:59,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:59,255 INFO L93 Difference]: Finished difference Result 68299 states and 96284 transitions. [2021-11-07 01:15:59,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:15:59,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-07 01:15:59,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:59,302 INFO L225 Difference]: With dead ends: 68299 [2021-11-07 01:15:59,302 INFO L226 Difference]: Without dead ends: 34164 [2021-11-07 01:15:59,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:15:59,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34164 states. [2021-11-07 01:16:00,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34164 to 33573. [2021-11-07 01:16:00,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33573 states, 33548 states have (on average 1.3956122570645046) internal successors, (46820), 33572 states have internal predecessors, (46820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33573 states to 33573 states and 46820 transitions. [2021-11-07 01:16:00,732 INFO L78 Accepts]: Start accepts. Automaton has 33573 states and 46820 transitions. Word has length 152 [2021-11-07 01:16:00,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:00,732 INFO L470 AbstractCegarLoop]: Abstraction has 33573 states and 46820 transitions. [2021-11-07 01:16:00,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 33573 states and 46820 transitions. [2021-11-07 01:16:00,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-07 01:16:00,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:00,739 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:16:00,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:01,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:01,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:01,154 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:16:01,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:01,154 INFO L85 PathProgramCache]: Analyzing trace with hash 59559302, now seen corresponding path program 1 times [2021-11-07 01:16:01,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:01,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073272918] [2021-11-07 01:16:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:01,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:01,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:01,163 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:01,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:16:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:18,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 3452 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:16:18,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:16:19,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 01:16:20,542 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:20,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073272918] [2021-11-07 01:16:20,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073272918] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:20,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1249541815] [2021-11-07 01:16:20,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:20,543 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:16:20,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:16:20,544 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:16:20,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 01:16:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:25,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 3452 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:16:25,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 01:16:26,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 01:16:26,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1249541815] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:26,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:16:26,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:16:26,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510523827] [2021-11-07 01:16:26,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:16:26,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:26,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:16:26,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:16:26,589 INFO L87 Difference]: Start difference. First operand 33573 states and 46820 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:30,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:30,294 INFO L93 Difference]: Finished difference Result 33573 states and 46820 transitions. [2021-11-07 01:16:30,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:16:30,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 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 158 [2021-11-07 01:16:30,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:30,343 INFO L225 Difference]: With dead ends: 33573 [2021-11-07 01:16:30,343 INFO L226 Difference]: Without dead ends: 33561 [2021-11-07 01:16:30,351 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 621 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:16:30,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33561 states. [2021-11-07 01:16:31,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33561 to 33561. [2021-11-07 01:16:31,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33561 states, 33542 states have (on average 1.3913898992308151) internal successors, (46670), 33560 states have internal predecessors, (46670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:31,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33561 states to 33561 states and 46670 transitions. [2021-11-07 01:16:31,652 INFO L78 Accepts]: Start accepts. Automaton has 33561 states and 46670 transitions. Word has length 158 [2021-11-07 01:16:31,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:31,652 INFO L470 AbstractCegarLoop]: Abstraction has 33561 states and 46670 transitions. [2021-11-07 01:16:31,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:31,653 INFO L276 IsEmpty]: Start isEmpty. Operand 33561 states and 46670 transitions. [2021-11-07 01:16:31,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-07 01:16:31,677 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:31,678 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:31,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:31,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-07 01:16:32,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:16:32,102 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:16:32,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:32,102 INFO L85 PathProgramCache]: Analyzing trace with hash -607222255, now seen corresponding path program 1 times [2021-11-07 01:16:32,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:32,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438371367] [2021-11-07 01:16:32,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:32,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:32,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:32,111 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:32,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:16:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:49,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 3564 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:16:49,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:16:51,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:16:52,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:52,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438371367] [2021-11-07 01:16:52,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438371367] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:52,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1944114767] [2021-11-07 01:16:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:52,441 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:16:52,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:16:52,463 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:16:52,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 01:16:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:58,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 3564 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:16:58,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:16:59,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:00,414 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:17:00,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1944114767] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:00,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:17:00,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:17:00,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239211612] [2021-11-07 01:17:00,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:17:00,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:00,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:17:00,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:17:00,416 INFO L87 Difference]: Start difference. First operand 33561 states and 46670 transitions. Second operand has 8 states, 8 states have (on average 26.125) internal successors, (209), 8 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:06,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:06,875 INFO L93 Difference]: Finished difference Result 67056 states and 93264 transitions. [2021-11-07 01:17:06,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:17:06,876 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.125) internal successors, (209), 8 states have internal predecessors, (209), 0 states have call successors, (0), 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 175 [2021-11-07 01:17:06,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:06,941 INFO L225 Difference]: With dead ends: 67056 [2021-11-07 01:17:06,941 INFO L226 Difference]: Without dead ends: 33573 [2021-11-07 01:17:06,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 684 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:17:06,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33573 states. [2021-11-07 01:17:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33573 to 33564. [2021-11-07 01:17:08,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33564 states, 33545 states have (on average 1.3913250857057684) internal successors, (46672), 33563 states have internal predecessors, (46672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33564 states to 33564 states and 46672 transitions. [2021-11-07 01:17:08,229 INFO L78 Accepts]: Start accepts. Automaton has 33564 states and 46672 transitions. Word has length 175 [2021-11-07 01:17:08,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:08,229 INFO L470 AbstractCegarLoop]: Abstraction has 33564 states and 46672 transitions. [2021-11-07 01:17:08,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.125) internal successors, (209), 8 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 33564 states and 46672 transitions. [2021-11-07 01:17:08,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-07 01:17:08,254 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:08,254 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:08,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-07 01:17:08,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-07 01:17:08,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:08,670 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:17:08,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:08,671 INFO L85 PathProgramCache]: Analyzing trace with hash -580156653, now seen corresponding path program 1 times [2021-11-07 01:17:08,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:08,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257008784] [2021-11-07 01:17:08,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:08,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:08,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:08,679 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:08,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:17:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:27,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:17:27,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:17:28,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:17:29,594 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:29,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257008784] [2021-11-07 01:17:29,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257008784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:29,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1221687711] [2021-11-07 01:17:29,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:29,595 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:17:29,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:17:29,623 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:17:29,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:17:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:35,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:17:35,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:17:36,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:17:37,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1221687711] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:37,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:17:37,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [5, 5] total 13 [2021-11-07 01:17:37,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880027759] [2021-11-07 01:17:37,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:17:37,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:37,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:17:37,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:17:37,594 INFO L87 Difference]: Start difference. First operand 33564 states and 46672 transitions. Second operand has 7 states, 7 states have (on average 29.714285714285715) internal successors, (208), 7 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) [2021-11-07 01:17:50,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:50,924 INFO L93 Difference]: Finished difference Result 164663 states and 229256 transitions. [2021-11-07 01:17:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:17:50,928 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 29.714285714285715) internal successors, (208), 7 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 175 [2021-11-07 01:17:50,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:51,323 INFO L225 Difference]: With dead ends: 164663 [2021-11-07 01:17:51,323 INFO L226 Difference]: Without dead ends: 131180 [2021-11-07 01:17:51,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 690 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:17:51,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131180 states. [2021-11-07 01:17:54,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131180 to 33596. [2021-11-07 01:17:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33596 states, 33577 states have (on average 1.3904756231944486) internal successors, (46688), 33595 states have internal predecessors, (46688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33596 states to 33596 states and 46688 transitions. [2021-11-07 01:17:54,506 INFO L78 Accepts]: Start accepts. Automaton has 33596 states and 46688 transitions. Word has length 175 [2021-11-07 01:17:54,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:54,507 INFO L470 AbstractCegarLoop]: Abstraction has 33596 states and 46688 transitions. [2021-11-07 01:17:54,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.714285714285715) internal successors, (208), 7 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) [2021-11-07 01:17:54,507 INFO L276 IsEmpty]: Start isEmpty. Operand 33596 states and 46688 transitions. [2021-11-07 01:17:54,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-07 01:17:54,533 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:54,534 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:54,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:54,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:54,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:54,950 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:17:54,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:54,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1166542393, now seen corresponding path program 1 times [2021-11-07 01:17:54,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:54,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485685120] [2021-11-07 01:17:54,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:54,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:54,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:54,959 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:54,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 01:18:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:13,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 3590 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:18:13,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:18:14,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:18:15,816 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:18:15,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485685120] [2021-11-07 01:18:15,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485685120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:18:15,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [443706112] [2021-11-07 01:18:15,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:15,817 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:18:15,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:18:15,818 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:18:15,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 01:18:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:21,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 3590 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:18:21,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:18:22,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:18:22,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [443706112] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:18:22,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:18:22,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:18:22,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026501972] [2021-11-07 01:18:22,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:18:22,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:18:22,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:18:22,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:18:22,835 INFO L87 Difference]: Start difference. First operand 33596 states and 46688 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:28,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:18:28,225 INFO L93 Difference]: Finished difference Result 93458 states and 130150 transitions. [2021-11-07 01:18:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:18:28,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-11-07 01:18:28,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:18:28,314 INFO L225 Difference]: With dead ends: 93458 [2021-11-07 01:18:28,314 INFO L226 Difference]: Without dead ends: 59943 [2021-11-07 01:18:28,345 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 697 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:18:28,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59943 states. [2021-11-07 01:18:30,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59943 to 33628. [2021-11-07 01:18:30,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33628 states, 33609 states have (on average 1.3900740872980453) internal successors, (46719), 33627 states have internal predecessors, (46719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:30,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33628 states to 33628 states and 46719 transitions. [2021-11-07 01:18:30,707 INFO L78 Accepts]: Start accepts. Automaton has 33628 states and 46719 transitions. Word has length 177 [2021-11-07 01:18:30,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:18:30,708 INFO L470 AbstractCegarLoop]: Abstraction has 33628 states and 46719 transitions. [2021-11-07 01:18:30,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:30,708 INFO L276 IsEmpty]: Start isEmpty. Operand 33628 states and 46719 transitions. [2021-11-07 01:18:30,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-07 01:18:30,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:18:30,726 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:18:30,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:30,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:31,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:18:31,131 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:18:31,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:18:31,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1413252415, now seen corresponding path program 1 times [2021-11-07 01:18:31,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:18:31,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117073714] [2021-11-07 01:18:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:31,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:18:31,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:18:31,141 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:18:31,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 01:18:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:49,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 3597 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:18:49,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:18:50,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:18:52,057 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:18:52,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117073714] [2021-11-07 01:18:52,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117073714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:18:52,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1117091011] [2021-11-07 01:18:52,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:52,057 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:18:52,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:18:52,058 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:18:52,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 01:18:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:58,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 3597 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:18:58,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:18:59,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:18:59,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1117091011] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:18:59,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:18:59,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 01:18:59,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864551026] [2021-11-07 01:18:59,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:18:59,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:18:59,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:18:59,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:18:59,765 INFO L87 Difference]: Start difference. First operand 33628 states and 46719 transitions. Second operand has 6 states, 6 states have (on average 29.333333333333332) internal successors, (176), 6 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:14,754 INFO L93 Difference]: Finished difference Result 161942 states and 225270 transitions. [2021-11-07 01:19:14,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:19:14,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.333333333333332) internal successors, (176), 6 states have internal predecessors, (176), 0 states have call successors, (0), 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 181 [2021-11-07 01:19:14,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:15,210 INFO L225 Difference]: With dead ends: 161942 [2021-11-07 01:19:15,211 INFO L226 Difference]: Without dead ends: 128395 [2021-11-07 01:19:15,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 712 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:19:15,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128395 states. [2021-11-07 01:19:18,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128395 to 33637. [2021-11-07 01:19:18,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33637 states, 33619 states have (on average 1.3892441773996846) internal successors, (46705), 33636 states have internal predecessors, (46705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33637 states to 33637 states and 46705 transitions. [2021-11-07 01:19:18,576 INFO L78 Accepts]: Start accepts. Automaton has 33637 states and 46705 transitions. Word has length 181 [2021-11-07 01:19:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:18,576 INFO L470 AbstractCegarLoop]: Abstraction has 33637 states and 46705 transitions. [2021-11-07 01:19:18,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.333333333333332) internal successors, (176), 6 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 33637 states and 46705 transitions. [2021-11-07 01:19:18,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-07 01:19:18,624 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:18,624 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:18,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:18,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-07 01:19:19,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:19,029 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:19:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:19,030 INFO L85 PathProgramCache]: Analyzing trace with hash 744555474, now seen corresponding path program 1 times [2021-11-07 01:19:19,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:19,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601476063] [2021-11-07 01:19:19,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:19,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:19,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:19,038 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:19,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 01:19:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:38,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 3807 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:19:38,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 01:19:39,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 01:19:41,474 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:41,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601476063] [2021-11-07 01:19:41,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601476063] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:19:41,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [240340150] [2021-11-07 01:19:41,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:41,475 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:19:41,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:19:41,476 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:19:41,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-07 01:19:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:48,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 3807 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:19:48,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:19:49,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:19:49,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [240340150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:49,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:19:49,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:19:49,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160744114] [2021-11-07 01:19:49,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:49,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:49,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:49,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:19:49,617 INFO L87 Difference]: Start difference. First operand 33637 states and 46705 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:00,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:00,853 INFO L93 Difference]: Finished difference Result 100429 states and 139455 transitions. [2021-11-07 01:20:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:00,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 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 [2021-11-07 01:20:00,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:00,957 INFO L225 Difference]: With dead ends: 100429 [2021-11-07 01:20:00,957 INFO L226 Difference]: Without dead ends: 66873 [2021-11-07 01:20:00,986 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 857 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:20:01,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66873 states. [2021-11-07 01:20:03,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66873 to 34085. [2021-11-07 01:20:03,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34085 states, 34067 states have (on average 1.390700678075557) internal successors, (47377), 34084 states have internal predecessors, (47377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:04,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34085 states to 34085 states and 47377 transitions. [2021-11-07 01:20:04,025 INFO L78 Accepts]: Start accepts. Automaton has 34085 states and 47377 transitions. Word has length 217 [2021-11-07 01:20:04,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:04,025 INFO L470 AbstractCegarLoop]: Abstraction has 34085 states and 47377 transitions. [2021-11-07 01:20:04,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:04,025 INFO L276 IsEmpty]: Start isEmpty. Operand 34085 states and 47377 transitions. [2021-11-07 01:20:04,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-07 01:20:04,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:04,052 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:04,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:04,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:04,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:20:04,454 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 68 more)] === [2021-11-07 01:20:04,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:04,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1871800953, now seen corresponding path program 1 times [2021-11-07 01:20:04,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:04,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587914122] [2021-11-07 01:20:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:04,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:04,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:04,462 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:04,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 01:20:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:24,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 3828 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:20:24,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 01:20:25,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 01:20:27,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:27,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587914122] [2021-11-07 01:20:27,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587914122] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:20:27,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1655864287] [2021-11-07 01:20:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:27,136 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:20:27,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:20:27,137 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:20:27,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99341fb1-7b1f-46e9-905e-60fb13ae4900/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-07 01:20:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:34,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 3828 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:34,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:20:34,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:20:35,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1655864287] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:35,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:20:35,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:20:35,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577339923] [2021-11-07 01:20:35,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:35,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:35,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:35,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:20:35,528 INFO L87 Difference]: Start difference. First operand 34085 states and 47377 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)