./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs --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 32bit --witnessprinter.graph.data.programhash da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:45:09,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:45:09,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:45:09,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:45:09,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:45:09,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:45:09,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:45:09,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:45:09,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:45:09,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:45:09,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:45:09,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:45:09,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:45:09,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:45:09,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:45:09,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:45:09,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:45:09,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:45:09,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:45:09,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:45:09,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:45:09,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:45:09,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:45:09,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:45:09,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:45:09,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:45:09,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:45:09,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:45:09,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:45:09,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:45:09,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:45:09,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:45:09,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:45:09,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:45:09,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:45:09,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:45:09,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:45:09,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:45:09,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:45:09,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:45:09,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:45:09,251 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:45:09,294 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:45:09,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:45:09,296 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:45:09,297 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:45:09,297 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:45:09,297 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:45:09,297 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:45:09,297 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:45:09,304 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:45:09,304 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:45:09,305 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:45:09,305 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:45:09,306 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:45:09,306 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:45:09,306 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:45:09,306 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:45:09,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:45:09,307 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:45:09,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:45:09,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:45:09,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:45:09,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:45:09,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:45:09,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:45:09,309 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:45:09,309 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:45:09,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:45:09,310 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:45:09,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:45:09,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:45:09,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:45:09,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:45:09,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:45:09,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:45:09,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:45:09,313 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:45:09,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:45:09,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:45:09,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:45:09,314 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:45:09,314 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_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 [2021-11-19 15:45:09,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:45:09,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:45:09,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:45:09,600 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:45:09,600 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:45:09,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2021-11-19 15:45:09,698 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/data/ec5e85779/89876b84901e424ba9ab243c9bc7e720/FLAG0e1021dde [2021-11-19 15:45:10,360 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:45:10,361 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2021-11-19 15:45:10,409 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/data/ec5e85779/89876b84901e424ba9ab243c9bc7e720/FLAG0e1021dde [2021-11-19 15:45:10,549 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/data/ec5e85779/89876b84901e424ba9ab243c9bc7e720 [2021-11-19 15:45:10,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:45:10,552 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:45:10,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:45:10,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:45:10,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:45:10,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:45:10" (1/1) ... [2021-11-19 15:45:10,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66919883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:10, skipping insertion in model container [2021-11-19 15:45:10,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:45:10" (1/1) ... [2021-11-19 15:45:10,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:45:10,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:45:11,187 WARN L230 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_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2021-11-19 15:45:11,248 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:45:11,259 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) [2021-11-19 15:45:11,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6566a2ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:11, skipping insertion in model container [2021-11-19 15:45:11,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:45:11,261 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:45:11,265 INFO L158 Benchmark]: Toolchain (without parser) took 711.64ms. Allocated memory is still 146.8MB. Free memory was 108.3MB in the beginning and 105.0MB in the end (delta: 3.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 15:45:11,266 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 86.0MB. Free memory was 45.9MB in the beginning and 45.8MB in the end (delta: 40.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:45:11,267 INFO L158 Benchmark]: CACSL2BoogieTranslator took 698.91ms. Allocated memory is still 146.8MB. Free memory was 108.0MB in the beginning and 105.0MB in the end (delta: 3.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 15:45:11,270 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 86.0MB. Free memory was 45.9MB in the beginning and 45.8MB in the end (delta: 40.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 698.91ms. Allocated memory is still 146.8MB. Free memory was 108.0MB in the beginning and 105.0MB in the end (delta: 3.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3010]: 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_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs --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 32bit --witnessprinter.graph.data.programhash da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:45:13,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:45:13,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:45:13,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:45:13,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:45:13,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:45:13,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:45:13,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:45:13,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:45:13,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:45:13,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:45:13,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:45:13,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:45:13,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:45:13,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:45:13,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:45:13,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:45:13,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:45:13,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:45:13,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:45:13,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:45:13,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:45:13,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:45:13,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:45:13,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:45:13,560 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:45:13,560 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:45:13,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:45:13,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:45:13,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:45:13,567 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:45:13,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:45:13,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:45:13,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:45:13,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:45:13,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:45:13,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:45:13,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:45:13,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:45:13,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:45:13,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:45:13,578 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 15:45:13,624 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:45:13,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:45:13,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:45:13,626 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:45:13,626 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:45:13,626 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:45:13,626 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:45:13,627 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:45:13,627 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:45:13,627 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:45:13,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:45:13,630 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:45:13,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:45:13,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:45:13,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:45:13,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:45:13,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:45:13,631 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:45:13,631 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:45:13,631 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:45:13,632 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:45:13,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:45:13,632 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:45:13,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:45:13,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:45:13,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:45:13,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:45:13,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:45:13,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:45:13,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:45:13,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:45:13,634 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:45:13,634 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:45:13,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:45:13,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:45:13,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:45:13,636 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_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 [2021-11-19 15:45:14,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:45:14,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:45:14,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:45:14,077 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:45:14,078 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:45:14,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2021-11-19 15:45:14,154 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/data/14e19d90b/e27ec912df9c4abda4ae4b0b0f0fdf94/FLAG20655b35c [2021-11-19 15:45:14,949 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:45:14,949 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2021-11-19 15:45:14,974 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/data/14e19d90b/e27ec912df9c4abda4ae4b0b0f0fdf94/FLAG20655b35c [2021-11-19 15:45:15,041 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/data/14e19d90b/e27ec912df9c4abda4ae4b0b0f0fdf94 [2021-11-19 15:45:15,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:45:15,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:45:15,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:45:15,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:45:15,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:45:15,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:45:15" (1/1) ... [2021-11-19 15:45:15,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cf2ca79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:15, skipping insertion in model container [2021-11-19 15:45:15,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:45:15" (1/1) ... [2021-11-19 15:45:15,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:45:15,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:45:15,674 WARN L230 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_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2021-11-19 15:45:15,797 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:45:15,820 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:45:15,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:45:15,971 WARN L230 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_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2021-11-19 15:45:16,025 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:45:16,034 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:45:16,133 WARN L230 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_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2021-11-19 15:45:16,160 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:45:16,199 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:45:16,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:16 WrapperNode [2021-11-19 15:45:16,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:45:16,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:45:16,201 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:45:16,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:45:16,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:16" (1/1) ... [2021-11-19 15:45:16,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:16" (1/1) ... [2021-11-19 15:45:16,347 INFO L137 Inliner]: procedures = 96, calls = 341, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 1044 [2021-11-19 15:45:16,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:45:16,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:45:16,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:45:16,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:45:16,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:16" (1/1) ... [2021-11-19 15:45:16,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:16" (1/1) ... [2021-11-19 15:45:16,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:16" (1/1) ... [2021-11-19 15:45:16,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:16" (1/1) ... [2021-11-19 15:45:16,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:16" (1/1) ... [2021-11-19 15:45:16,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:16" (1/1) ... [2021-11-19 15:45:16,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:16" (1/1) ... [2021-11-19 15:45:16,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:45:16,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:45:16,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:45:16,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:45:16,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:16" (1/1) ... [2021-11-19 15:45:16,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:45:16,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:45:16,538 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:45:16,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:45:16,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:45:16,584 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 15:45:16,584 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 15:45:16,584 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 15:45:16,585 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 15:45:16,585 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 15:45:16,585 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 15:45:16,585 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 15:45:16,585 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 15:45:16,585 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 15:45:16,585 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 15:45:16,585 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 15:45:16,586 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 15:45:16,586 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 15:45:16,586 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 15:45:16,586 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 15:45:16,586 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 15:45:16,586 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 15:45:16,586 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 15:45:16,587 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 15:45:16,587 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 15:45:16,587 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 15:45:16,587 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 15:45:16,587 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 15:45:16,587 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 15:45:16,587 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 15:45:16,587 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 15:45:16,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:45:16,588 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 15:45:16,588 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 15:45:16,588 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 15:45:16,588 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 15:45:16,588 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 15:45:16,588 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 15:45:16,588 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 15:45:16,589 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 15:45:16,589 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 15:45:16,589 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 15:45:16,589 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 15:45:16,589 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 15:45:16,589 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 15:45:16,590 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 15:45:16,590 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 15:45:16,590 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 15:45:16,590 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 15:45:16,590 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 15:45:16,590 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 15:45:16,591 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 15:45:16,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:45:16,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:45:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 15:45:16,595 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 15:45:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-19 15:45:16,595 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-19 15:45:16,781 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:45:16,791 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:45:18,003 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:45:18,026 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:45:18,026 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 15:45:18,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:45:18 BoogieIcfgContainer [2021-11-19 15:45:18,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:45:18,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:45:18,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:45:18,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:45:18,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:45:15" (1/3) ... [2021-11-19 15:45:18,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b6040a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:45:18, skipping insertion in model container [2021-11-19 15:45:18,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:16" (2/3) ... [2021-11-19 15:45:18,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b6040a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:45:18, skipping insertion in model container [2021-11-19 15:45:18,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:45:18" (3/3) ... [2021-11-19 15:45:18,040 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product28.cil.c [2021-11-19 15:45:18,045 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:45:18,046 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:45:18,119 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:45:18,126 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 [2021-11-19 15:45:18,126 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:45:18,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 554 states, 430 states have (on average 1.672093023255814) internal successors, (719), 448 states have internal predecessors, (719), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 15:45:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 15:45:18,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:18,171 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:18,171 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:18,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:18,176 INFO L85 PathProgramCache]: Analyzing trace with hash 861521184, now seen corresponding path program 1 times [2021-11-19 15:45:18,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:18,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982649757] [2021-11-19 15:45:18,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:18,195 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:18,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:18,212 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:18,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:45:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:18,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:45:18,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:18,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:18,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:18,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982649757] [2021-11-19 15:45:18,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982649757] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:18,977 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:18,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:45:18,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531247975] [2021-11-19 15:45:18,981 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:18,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:45:18,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:19,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:45:19,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:45:19,030 INFO L87 Difference]: Start difference. First operand has 554 states, 430 states have (on average 1.672093023255814) internal successors, (719), 448 states have internal predecessors, (719), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 15:45:19,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:19,229 INFO L93 Difference]: Finished difference Result 1103 states and 1828 transitions. [2021-11-19 15:45:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:19,235 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 63 [2021-11-19 15:45:19,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:19,269 INFO L225 Difference]: With dead ends: 1103 [2021-11-19 15:45:19,269 INFO L226 Difference]: Without dead ends: 549 [2021-11-19 15:45:19,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:45:19,287 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 32 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1788 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:19,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1788 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:45:19,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-19 15:45:19,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-19 15:45:19,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 426 states have (on average 1.6502347417840375) internal successors, (703), 443 states have internal predecessors, (703), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-19 15:45:19,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 896 transitions. [2021-11-19 15:45:19,423 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 896 transitions. Word has length 63 [2021-11-19 15:45:19,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:19,424 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 896 transitions. [2021-11-19 15:45:19,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 15:45:19,425 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 896 transitions. [2021-11-19 15:45:19,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 15:45:19,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:19,440 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:19,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:19,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:19,656 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:19,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:19,657 INFO L85 PathProgramCache]: Analyzing trace with hash 169835, now seen corresponding path program 1 times [2021-11-19 15:45:19,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:19,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137919038] [2021-11-19 15:45:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:19,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:19,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:19,659 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:19,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:45:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:19,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:45:19,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:20,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:20,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:20,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137919038] [2021-11-19 15:45:20,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137919038] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:20,571 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:20,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 15:45:20,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174115750] [2021-11-19 15:45:20,572 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:20,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:45:20,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:20,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:45:20,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:45:20,574 INFO L87 Difference]: Start difference. First operand 549 states and 896 transitions. Second operand has 11 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 15:45:20,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:20,803 INFO L93 Difference]: Finished difference Result 1086 states and 1784 transitions. [2021-11-19 15:45:20,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:45:20,804 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 68 [2021-11-19 15:45:20,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:20,811 INFO L225 Difference]: With dead ends: 1086 [2021-11-19 15:45:20,811 INFO L226 Difference]: Without dead ends: 558 [2021-11-19 15:45:20,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:45:20,816 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 193 mSDsluCounter, 6058 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 6938 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:20,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 6938 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:20,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-19 15:45:20,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-11-19 15:45:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 434 states have (on average 1.6497695852534562) internal successors, (716), 452 states have internal predecessors, (716), 97 states have call successors, (97), 26 states have call predecessors, (97), 26 states have return successors, (97), 93 states have call predecessors, (97), 96 states have call successors, (97) [2021-11-19 15:45:20,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 910 transitions. [2021-11-19 15:45:20,885 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 910 transitions. Word has length 68 [2021-11-19 15:45:20,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:20,886 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 910 transitions. [2021-11-19 15:45:20,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 15:45:20,887 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 910 transitions. [2021-11-19 15:45:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 15:45:20,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:20,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:20,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:21,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:21,114 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:21,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:21,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1884875238, now seen corresponding path program 1 times [2021-11-19 15:45:21,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:21,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023749665] [2021-11-19 15:45:21,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:21,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:21,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:21,117 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:21,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:45:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:21,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:45:21,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:21,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:21,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:21,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023749665] [2021-11-19 15:45:21,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023749665] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:21,731 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:21,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:45:21,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710466157] [2021-11-19 15:45:21,733 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:21,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:45:21,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:21,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:45:21,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:45:21,736 INFO L87 Difference]: Start difference. First operand 558 states and 910 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 15:45:22,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:22,039 INFO L93 Difference]: Finished difference Result 1142 states and 1875 transitions. [2021-11-19 15:45:22,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:22,041 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 69 [2021-11-19 15:45:22,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:22,047 INFO L225 Difference]: With dead ends: 1142 [2021-11-19 15:45:22,047 INFO L226 Difference]: Without dead ends: 572 [2021-11-19 15:45:22,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:45:22,054 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 230 mSDsluCounter, 1656 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 2497 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:22,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 2497 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:45:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-19 15:45:22,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 563. [2021-11-19 15:45:22,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 439 states have (on average 1.5922551252847381) internal successors, (699), 456 states have internal predecessors, (699), 97 states have call successors, (97), 27 states have call predecessors, (97), 26 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-19 15:45:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 892 transitions. [2021-11-19 15:45:22,102 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 892 transitions. Word has length 69 [2021-11-19 15:45:22,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:22,104 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 892 transitions. [2021-11-19 15:45:22,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 15:45:22,105 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 892 transitions. [2021-11-19 15:45:22,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 15:45:22,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:22,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:22,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:22,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:22,322 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:22,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:22,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2064383585, now seen corresponding path program 1 times [2021-11-19 15:45:22,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:22,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871427469] [2021-11-19 15:45:22,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:22,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:22,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:22,331 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:22,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:45:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:22,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:45:22,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:22,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:23,081 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:23,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871427469] [2021-11-19 15:45:23,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871427469] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:23,082 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:23,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 15:45:23,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742555665] [2021-11-19 15:45:23,083 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:23,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:45:23,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:23,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:45:23,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:45:23,085 INFO L87 Difference]: Start difference. First operand 563 states and 892 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 15:45:23,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:23,274 INFO L93 Difference]: Finished difference Result 1084 states and 1738 transitions. [2021-11-19 15:45:23,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:45:23,278 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 71 [2021-11-19 15:45:23,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:23,284 INFO L225 Difference]: With dead ends: 1084 [2021-11-19 15:45:23,285 INFO L226 Difference]: Without dead ends: 551 [2021-11-19 15:45:23,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:45:23,297 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 86 mSDsluCounter, 5011 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 5872 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:23,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 5872 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:23,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-11-19 15:45:23,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 542. [2021-11-19 15:45:23,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 418 states have (on average 1.605263157894737) internal successors, (671), 435 states have internal predecessors, (671), 97 states have call successors, (97), 27 states have call predecessors, (97), 26 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-19 15:45:23,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 864 transitions. [2021-11-19 15:45:23,335 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 864 transitions. Word has length 71 [2021-11-19 15:45:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:23,335 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 864 transitions. [2021-11-19 15:45:23,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 15:45:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 864 transitions. [2021-11-19 15:45:23,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 15:45:23,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:23,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:23,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:23,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:23,561 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:23,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:23,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1339541112, now seen corresponding path program 1 times [2021-11-19 15:45:23,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:23,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145202699] [2021-11-19 15:45:23,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:23,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:23,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:23,564 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:23,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:45:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:23,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:45:23,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:24,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:24,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:24,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145202699] [2021-11-19 15:45:24,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145202699] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:24,449 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:24,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:45:24,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158145196] [2021-11-19 15:45:24,450 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:24,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:45:24,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:24,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:45:24,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:45:24,451 INFO L87 Difference]: Start difference. First operand 542 states and 864 transitions. Second operand has 13 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 15:45:24,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:24,759 INFO L93 Difference]: Finished difference Result 1053 states and 1693 transitions. [2021-11-19 15:45:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:45:24,761 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 74 [2021-11-19 15:45:24,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:24,766 INFO L225 Difference]: With dead ends: 1053 [2021-11-19 15:45:24,766 INFO L226 Difference]: Without dead ends: 547 [2021-11-19 15:45:24,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:45:24,770 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 74 mSDsluCounter, 6542 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 7363 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:24,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 7363 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:45:24,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-19 15:45:24,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 544. [2021-11-19 15:45:24,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 420 states have (on average 1.6) internal successors, (672), 437 states have internal predecessors, (672), 97 states have call successors, (97), 27 states have call predecessors, (97), 26 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-19 15:45:24,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 865 transitions. [2021-11-19 15:45:24,796 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 865 transitions. Word has length 74 [2021-11-19 15:45:24,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:24,797 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 865 transitions. [2021-11-19 15:45:24,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 15:45:24,797 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 865 transitions. [2021-11-19 15:45:24,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 15:45:24,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:24,799 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:24,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:25,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:25,015 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:25,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash 102707193, now seen corresponding path program 1 times [2021-11-19 15:45:25,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:25,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432813994] [2021-11-19 15:45:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:25,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:25,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:25,017 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:25,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:45:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:25,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:45:25,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:25,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:45:25,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:25,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432813994] [2021-11-19 15:45:25,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432813994] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:25,849 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:25,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-19 15:45:25,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799483729] [2021-11-19 15:45:25,849 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:25,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:45:25,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:25,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:45:25,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:45:25,851 INFO L87 Difference]: Start difference. First operand 544 states and 865 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 15:45:26,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:26,881 INFO L93 Difference]: Finished difference Result 2019 states and 3294 transitions. [2021-11-19 15:45:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:45:26,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 75 [2021-11-19 15:45:26,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:26,897 INFO L225 Difference]: With dead ends: 2019 [2021-11-19 15:45:26,898 INFO L226 Difference]: Without dead ends: 1518 [2021-11-19 15:45:26,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:45:26,903 INFO L933 BasicCegarLoop]: 1099 mSDtfsCounter, 1568 mSDsluCounter, 1942 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1568 SdHoareTripleChecker+Valid, 3041 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:26,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1568 Valid, 3041 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 15:45:26,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-11-19 15:45:26,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1392. [2021-11-19 15:45:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1086 states have (on average 1.6279926335174955) internal successors, (1768), 1120 states have internal predecessors, (1768), 241 states have call successors, (241), 67 states have call predecessors, (241), 64 states have return successors, (254), 220 states have call predecessors, (254), 238 states have call successors, (254) [2021-11-19 15:45:26,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 2263 transitions. [2021-11-19 15:45:26,980 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 2263 transitions. Word has length 75 [2021-11-19 15:45:26,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:26,980 INFO L470 AbstractCegarLoop]: Abstraction has 1392 states and 2263 transitions. [2021-11-19 15:45:26,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 15:45:26,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 2263 transitions. [2021-11-19 15:45:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 15:45:26,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:26,987 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:27,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:27,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:27,203 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:27,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:27,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1304070991, now seen corresponding path program 1 times [2021-11-19 15:45:27,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:27,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280792498] [2021-11-19 15:45:27,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:27,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:27,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:27,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:27,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:45:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:27,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:27,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:45:27,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:45:28,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:28,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280792498] [2021-11-19 15:45:28,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280792498] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:28,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:28,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 15:45:28,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56909447] [2021-11-19 15:45:28,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:28,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:28,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:28,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:28,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:45:28,307 INFO L87 Difference]: Start difference. First operand 1392 states and 2263 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 15:45:29,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:29,346 INFO L93 Difference]: Finished difference Result 2753 states and 4586 transitions. [2021-11-19 15:45:29,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:29,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 128 [2021-11-19 15:45:29,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:29,370 INFO L225 Difference]: With dead ends: 2753 [2021-11-19 15:45:29,370 INFO L226 Difference]: Without dead ends: 1404 [2021-11-19 15:45:29,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:29,387 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 776 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:29,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [794 Valid, 2082 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 15:45:29,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-11-19 15:45:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1404. [2021-11-19 15:45:29,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1095 states have (on average 1.6228310502283105) internal successors, (1777), 1129 states have internal predecessors, (1777), 241 states have call successors, (241), 70 states have call predecessors, (241), 67 states have return successors, (257), 220 states have call predecessors, (257), 238 states have call successors, (257) [2021-11-19 15:45:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 2275 transitions. [2021-11-19 15:45:29,494 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 2275 transitions. Word has length 128 [2021-11-19 15:45:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:29,495 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 2275 transitions. [2021-11-19 15:45:29,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 15:45:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 2275 transitions. [2021-11-19 15:45:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 15:45:29,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:29,500 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:29,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:29,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:29,701 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:29,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:29,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1252013686, now seen corresponding path program 1 times [2021-11-19 15:45:29,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:29,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672760063] [2021-11-19 15:45:29,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:29,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:29,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:29,706 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:29,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:45:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:30,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:45:30,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 15:45:30,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 15:45:30,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:30,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672760063] [2021-11-19 15:45:30,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672760063] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:30,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:30,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-19 15:45:30,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794552033] [2021-11-19 15:45:30,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:30,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:45:30,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:30,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:45:30,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:30,711 INFO L87 Difference]: Start difference. First operand 1404 states and 2275 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 15:45:31,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:31,388 INFO L93 Difference]: Finished difference Result 2979 states and 4792 transitions. [2021-11-19 15:45:31,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:45:31,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 130 [2021-11-19 15:45:31,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:31,409 INFO L225 Difference]: With dead ends: 2979 [2021-11-19 15:45:31,409 INFO L226 Difference]: Without dead ends: 1618 [2021-11-19 15:45:31,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:45:31,420 INFO L933 BasicCegarLoop]: 929 mSDtfsCounter, 615 mSDsluCounter, 2735 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 3664 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:31,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 3664 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:45:31,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2021-11-19 15:45:31,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1612. [2021-11-19 15:45:31,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1243 states have (on average 1.5534995977473853) internal successors, (1931), 1269 states have internal predecessors, (1931), 277 states have call successors, (277), 90 states have call predecessors, (277), 91 states have return successors, (326), 264 states have call predecessors, (326), 272 states have call successors, (326) [2021-11-19 15:45:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2534 transitions. [2021-11-19 15:45:31,542 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2534 transitions. Word has length 130 [2021-11-19 15:45:31,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:31,543 INFO L470 AbstractCegarLoop]: Abstraction has 1612 states and 2534 transitions. [2021-11-19 15:45:31,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 15:45:31,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2534 transitions. [2021-11-19 15:45:31,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 15:45:31,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:31,549 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:31,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-19 15:45:31,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:31,764 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:31,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:31,765 INFO L85 PathProgramCache]: Analyzing trace with hash 114714719, now seen corresponding path program 1 times [2021-11-19 15:45:31,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:31,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063027117] [2021-11-19 15:45:31,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:31,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:31,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:31,766 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:31,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 15:45:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:32,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:32,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:45:32,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 15:45:32,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:32,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063027117] [2021-11-19 15:45:32,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063027117] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:32,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:32,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 15:45:32,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592748968] [2021-11-19 15:45:32,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:32,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:32,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:32,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:32,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:45:32,901 INFO L87 Difference]: Start difference. First operand 1612 states and 2534 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 15:45:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:33,874 INFO L93 Difference]: Finished difference Result 3206 states and 5186 transitions. [2021-11-19 15:45:33,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:33,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 131 [2021-11-19 15:45:33,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:33,892 INFO L225 Difference]: With dead ends: 3206 [2021-11-19 15:45:33,892 INFO L226 Difference]: Without dead ends: 1637 [2021-11-19 15:45:33,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:33,909 INFO L933 BasicCegarLoop]: 814 mSDtfsCounter, 783 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:33,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 2083 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:45:33,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-11-19 15:45:34,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1637. [2021-11-19 15:45:34,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1263 states have (on average 1.5447347585114806) internal successors, (1951), 1289 states have internal predecessors, (1951), 277 states have call successors, (277), 95 states have call predecessors, (277), 96 states have return successors, (330), 264 states have call predecessors, (330), 272 states have call successors, (330) [2021-11-19 15:45:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 2558 transitions. [2021-11-19 15:45:34,048 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 2558 transitions. Word has length 131 [2021-11-19 15:45:34,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:34,050 INFO L470 AbstractCegarLoop]: Abstraction has 1637 states and 2558 transitions. [2021-11-19 15:45:34,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 15:45:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 2558 transitions. [2021-11-19 15:45:34,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 15:45:34,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:34,057 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:34,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:34,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:34,273 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:34,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:34,274 INFO L85 PathProgramCache]: Analyzing trace with hash -757109523, now seen corresponding path program 1 times [2021-11-19 15:45:34,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:34,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797823620] [2021-11-19 15:45:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:34,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:34,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:34,276 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:34,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 15:45:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:34,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:34,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 15:45:34,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 15:45:35,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:35,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797823620] [2021-11-19 15:45:35,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797823620] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:35,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:35,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 15:45:35,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941674554] [2021-11-19 15:45:35,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:35,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:35,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:35,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:35,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:45:35,380 INFO L87 Difference]: Start difference. First operand 1637 states and 2558 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 15:45:36,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:36,345 INFO L93 Difference]: Finished difference Result 3261 states and 5235 transitions. [2021-11-19 15:45:36,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:36,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 134 [2021-11-19 15:45:36,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:36,363 INFO L225 Difference]: With dead ends: 3261 [2021-11-19 15:45:36,363 INFO L226 Difference]: Without dead ends: 1667 [2021-11-19 15:45:36,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:36,375 INFO L933 BasicCegarLoop]: 814 mSDtfsCounter, 786 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:36,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 2083 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:45:36,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2021-11-19 15:45:36,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1667. [2021-11-19 15:45:36,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1288 states have (on average 1.5341614906832297) internal successors, (1976), 1314 states have internal predecessors, (1976), 277 states have call successors, (277), 100 states have call predecessors, (277), 101 states have return successors, (334), 264 states have call predecessors, (334), 272 states have call successors, (334) [2021-11-19 15:45:36,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2587 transitions. [2021-11-19 15:45:36,471 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2587 transitions. Word has length 134 [2021-11-19 15:45:36,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:36,471 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 2587 transitions. [2021-11-19 15:45:36,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 15:45:36,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2587 transitions. [2021-11-19 15:45:36,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 15:45:36,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:36,480 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:36,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:36,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:36,696 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:36,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:36,696 INFO L85 PathProgramCache]: Analyzing trace with hash -404367597, now seen corresponding path program 1 times [2021-11-19 15:45:36,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:36,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752645629] [2021-11-19 15:45:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:36,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:36,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:36,698 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:36,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 15:45:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:37,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:37,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:45:37,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 15:45:37,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:37,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752645629] [2021-11-19 15:45:37,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752645629] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:37,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:37,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 15:45:37,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955933967] [2021-11-19 15:45:37,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:37,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:37,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:37,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:37,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:45:37,792 INFO L87 Difference]: Start difference. First operand 1667 states and 2587 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 15:45:38,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:38,730 INFO L93 Difference]: Finished difference Result 3326 states and 5294 transitions. [2021-11-19 15:45:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:38,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 137 [2021-11-19 15:45:38,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:38,747 INFO L225 Difference]: With dead ends: 3326 [2021-11-19 15:45:38,747 INFO L226 Difference]: Without dead ends: 1702 [2021-11-19 15:45:38,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:38,760 INFO L933 BasicCegarLoop]: 814 mSDtfsCounter, 783 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:38,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 2083 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:45:38,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2021-11-19 15:45:38,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1702. [2021-11-19 15:45:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1318 states have (on average 1.5220030349013658) internal successors, (2006), 1344 states have internal predecessors, (2006), 277 states have call successors, (277), 105 states have call predecessors, (277), 106 states have return successors, (338), 264 states have call predecessors, (338), 272 states have call successors, (338) [2021-11-19 15:45:38,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 2621 transitions. [2021-11-19 15:45:38,884 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 2621 transitions. Word has length 137 [2021-11-19 15:45:38,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:38,885 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 2621 transitions. [2021-11-19 15:45:38,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 15:45:38,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 2621 transitions. [2021-11-19 15:45:38,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-19 15:45:38,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:38,892 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:38,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:39,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:39,108 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:39,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:39,109 INFO L85 PathProgramCache]: Analyzing trace with hash 13797161, now seen corresponding path program 1 times [2021-11-19 15:45:39,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:39,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812458342] [2021-11-19 15:45:39,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:39,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:39,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:39,110 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:39,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 15:45:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:39,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:45:39,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:39,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 15:45:40,498 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:40,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812458342] [2021-11-19 15:45:40,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812458342] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:45:40,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2107265798] [2021-11-19 15:45:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:40,499 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:45:40,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:45:40,500 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:45:40,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 15:45:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:40,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:45:40,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 15:45:41,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 15:45:41,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2107265798] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:41,271 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:45:41,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 15:45:41,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172876648] [2021-11-19 15:45:41,273 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:41,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:45:41,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:41,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:45:41,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 15:45:41,275 INFO L87 Difference]: Start difference. First operand 1702 states and 2621 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 15:45:41,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:41,455 INFO L93 Difference]: Finished difference Result 5004 states and 7833 transitions. [2021-11-19 15:45:41,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:45:41,456 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), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 140 [2021-11-19 15:45:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:41,487 INFO L225 Difference]: With dead ends: 5004 [2021-11-19 15:45:41,488 INFO L226 Difference]: Without dead ends: 3348 [2021-11-19 15:45:41,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 15:45:41,501 INFO L933 BasicCegarLoop]: 990 mSDtfsCounter, 845 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:41,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 1802 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:45:41,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-11-19 15:45:41,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 3336. [2021-11-19 15:45:41,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 2587 states have (on average 1.5264785465790491) internal successors, (3949), 2636 states have internal predecessors, (3949), 539 states have call successors, (539), 205 states have call predecessors, (539), 209 states have return successors, (705), 518 states have call predecessors, (705), 529 states have call successors, (705) [2021-11-19 15:45:41,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 5193 transitions. [2021-11-19 15:45:41,695 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 5193 transitions. Word has length 140 [2021-11-19 15:45:41,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:41,696 INFO L470 AbstractCegarLoop]: Abstraction has 3336 states and 5193 transitions. [2021-11-19 15:45:41,697 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), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 15:45:41,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 5193 transitions. [2021-11-19 15:45:41,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-19 15:45:41,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:41,703 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:41,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:41,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:42,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:45:42,121 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:42,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:42,121 INFO L85 PathProgramCache]: Analyzing trace with hash 408163947, now seen corresponding path program 1 times [2021-11-19 15:45:42,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:42,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020296839] [2021-11-19 15:45:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:42,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:42,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:42,123 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:42,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 15:45:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:42,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:45:42,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:42,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 15:45:43,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:43,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020296839] [2021-11-19 15:45:43,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020296839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:45:43,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [882298259] [2021-11-19 15:45:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:43,566 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:45:43,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:45:43,567 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:45:43,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 15:45:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:43,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:45:43,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:44,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 15:45:44,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [882298259] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:45:44,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092851774] [2021-11-19 15:45:44,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:44,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:45:44,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:45:44,823 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:45:44,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 15:45:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:44,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:45:44,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:45,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 15:45:45,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092851774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:45:45,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:45:45,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-19 15:45:45,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100352678] [2021-11-19 15:45:45,925 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:45:45,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 15:45:45,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:45,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 15:45:45,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-19 15:45:45,927 INFO L87 Difference]: Start difference. First operand 3336 states and 5193 transitions. Second operand has 18 states, 18 states have (on average 8.833333333333334) internal successors, (159), 14 states have internal predecessors, (159), 8 states have call successors, (30), 6 states have call predecessors, (30), 12 states have return successors, (31), 12 states have call predecessors, (31), 8 states have call successors, (31) [2021-11-19 15:45:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:55,852 INFO L93 Difference]: Finished difference Result 11289 states and 18257 transitions. [2021-11-19 15:45:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 15:45:55,853 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.833333333333334) internal successors, (159), 14 states have internal predecessors, (159), 8 states have call successors, (30), 6 states have call predecessors, (30), 12 states have return successors, (31), 12 states have call predecessors, (31), 8 states have call successors, (31) Word has length 140 [2021-11-19 15:45:55,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:55,927 INFO L225 Difference]: With dead ends: 11289 [2021-11-19 15:45:55,927 INFO L226 Difference]: Without dead ends: 7996 [2021-11-19 15:45:55,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 820 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-11-19 15:45:55,991 INFO L933 BasicCegarLoop]: 1631 mSDtfsCounter, 6916 mSDsluCounter, 4673 mSDsCounter, 0 mSdLazyCounter, 9890 mSolverCounterSat, 2679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6996 SdHoareTripleChecker+Valid, 6304 SdHoareTripleChecker+Invalid, 12569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2679 IncrementalHoareTripleChecker+Valid, 9890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:55,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6996 Valid, 6304 Invalid, 12569 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2679 Valid, 9890 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2021-11-19 15:45:56,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7996 states. [2021-11-19 15:45:56,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7996 to 7060. [2021-11-19 15:45:56,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7060 states, 5399 states have (on average 1.5145397295795517) internal successors, (8177), 5523 states have internal predecessors, (8177), 1177 states have call successors, (1177), 407 states have call predecessors, (1177), 483 states have return successors, (1731), 1187 states have call predecessors, (1731), 1157 states have call successors, (1731) [2021-11-19 15:45:56,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7060 states to 7060 states and 11085 transitions. [2021-11-19 15:45:56,573 INFO L78 Accepts]: Start accepts. Automaton has 7060 states and 11085 transitions. Word has length 140 [2021-11-19 15:45:56,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:56,574 INFO L470 AbstractCegarLoop]: Abstraction has 7060 states and 11085 transitions. [2021-11-19 15:45:56,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.833333333333334) internal successors, (159), 14 states have internal predecessors, (159), 8 states have call successors, (30), 6 states have call predecessors, (30), 12 states have return successors, (31), 12 states have call predecessors, (31), 8 states have call successors, (31) [2021-11-19 15:45:56,575 INFO L276 IsEmpty]: Start isEmpty. Operand 7060 states and 11085 transitions. [2021-11-19 15:45:56,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 15:45:56,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:56,588 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 15:45:56,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-19 15:45:56,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:57,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-19 15:45:57,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:45:57,204 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:57,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1559220546, now seen corresponding path program 1 times [2021-11-19 15:45:57,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:57,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690813268] [2021-11-19 15:45:57,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:57,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:57,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:57,208 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:57,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 15:45:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:57,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:45:57,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:57,782 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 15:45:57,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 15:45:58,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:58,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690813268] [2021-11-19 15:45:58,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690813268] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:58,241 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:58,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 15:45:58,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839885110] [2021-11-19 15:45:58,241 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:58,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 15:45:58,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:58,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 15:45:58,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:58,243 INFO L87 Difference]: Start difference. First operand 7060 states and 11085 transitions. Second operand has 10 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-19 15:45:58,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:58,786 INFO L93 Difference]: Finished difference Result 13784 states and 21684 transitions. [2021-11-19 15:45:58,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:45:58,787 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 143 [2021-11-19 15:45:58,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:58,833 INFO L225 Difference]: With dead ends: 13784 [2021-11-19 15:45:58,834 INFO L226 Difference]: Without dead ends: 6757 [2021-11-19 15:45:58,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:45:58,856 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 80 mSDsluCounter, 4885 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 5706 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:58,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 5706 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:58,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6757 states. [2021-11-19 15:45:59,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6757 to 6727. [2021-11-19 15:45:59,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6727 states, 5142 states have (on average 1.5219758848697005) internal successors, (7826), 5265 states have internal predecessors, (7826), 1133 states have call successors, (1133), 377 states have call predecessors, (1133), 451 states have return successors, (1615), 1142 states have call predecessors, (1615), 1113 states have call successors, (1615) [2021-11-19 15:45:59,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6727 states to 6727 states and 10574 transitions. [2021-11-19 15:45:59,324 INFO L78 Accepts]: Start accepts. Automaton has 6727 states and 10574 transitions. Word has length 143 [2021-11-19 15:45:59,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:59,325 INFO L470 AbstractCegarLoop]: Abstraction has 6727 states and 10574 transitions. [2021-11-19 15:45:59,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-19 15:45:59,326 INFO L276 IsEmpty]: Start isEmpty. Operand 6727 states and 10574 transitions. [2021-11-19 15:45:59,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 15:45:59,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:59,332 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:59,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:59,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:59,549 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:59,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:59,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2100732710, now seen corresponding path program 1 times [2021-11-19 15:45:59,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:59,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211577164] [2021-11-19 15:45:59,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:59,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:59,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:59,552 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:59,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 15:45:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:59,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:45:59,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:46:00,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 15:46:00,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:00,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211577164] [2021-11-19 15:46:00,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211577164] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:00,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [707669182] [2021-11-19 15:46:00,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:00,945 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:46:00,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:46:00,946 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:46:00,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-19 15:46:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:01,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:46:01,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:46:01,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 15:46:02,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [707669182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:02,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386070860] [2021-11-19 15:46:02,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:02,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:46:02,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:46:02,097 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:46:02,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 15:46:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:02,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:46:02,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:46:02,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 15:46:03,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386070860] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:03,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:46:03,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-19 15:46:03,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426499278] [2021-11-19 15:46:03,267 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:46:03,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 15:46:03,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:03,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 15:46:03,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:46:03,269 INFO L87 Difference]: Start difference. First operand 6727 states and 10574 transitions. Second operand has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 12 states have internal predecessors, (157), 8 states have call successors, (31), 6 states have call predecessors, (31), 10 states have return successors, (31), 10 states have call predecessors, (31), 8 states have call successors, (31) [2021-11-19 15:46:10,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:10,244 INFO L93 Difference]: Finished difference Result 17172 states and 27644 transitions. [2021-11-19 15:46:10,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 15:46:10,245 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 12 states have internal predecessors, (157), 8 states have call successors, (31), 6 states have call predecessors, (31), 10 states have return successors, (31), 10 states have call predecessors, (31), 8 states have call successors, (31) Word has length 146 [2021-11-19 15:46:10,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:10,314 INFO L225 Difference]: With dead ends: 17172 [2021-11-19 15:46:10,315 INFO L226 Difference]: Without dead ends: 10485 [2021-11-19 15:46:10,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 861 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:46:10,356 INFO L933 BasicCegarLoop]: 1545 mSDtfsCounter, 3830 mSDsluCounter, 3476 mSDsCounter, 0 mSdLazyCounter, 6989 mSolverCounterSat, 1186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3901 SdHoareTripleChecker+Valid, 5021 SdHoareTripleChecker+Invalid, 8175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1186 IncrementalHoareTripleChecker+Valid, 6989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:10,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3901 Valid, 5021 Invalid, 8175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1186 Valid, 6989 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-11-19 15:46:10,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10485 states. [2021-11-19 15:46:11,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10485 to 10099. [2021-11-19 15:46:11,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10099 states, 7686 states have (on average 1.5204267499349466) internal successors, (11686), 7867 states have internal predecessors, (11686), 1727 states have call successors, (1727), 549 states have call predecessors, (1727), 685 states have return successors, (2497), 1774 states have call predecessors, (2497), 1697 states have call successors, (2497) [2021-11-19 15:46:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10099 states to 10099 states and 15910 transitions. [2021-11-19 15:46:11,114 INFO L78 Accepts]: Start accepts. Automaton has 10099 states and 15910 transitions. Word has length 146 [2021-11-19 15:46:11,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:11,115 INFO L470 AbstractCegarLoop]: Abstraction has 10099 states and 15910 transitions. [2021-11-19 15:46:11,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 12 states have internal predecessors, (157), 8 states have call successors, (31), 6 states have call predecessors, (31), 10 states have return successors, (31), 10 states have call predecessors, (31), 8 states have call successors, (31) [2021-11-19 15:46:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 10099 states and 15910 transitions. [2021-11-19 15:46:11,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 15:46:11,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:11,121 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:11,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:11,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-19 15:46:11,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-19 15:46:11,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:46:11,725 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:46:11,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:11,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1191847912, now seen corresponding path program 1 times [2021-11-19 15:46:11,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:11,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574190592] [2021-11-19 15:46:11,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:11,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:11,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:11,728 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:11,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 15:46:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:12,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:46:12,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 15:46:12,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 15:46:12,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:12,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574190592] [2021-11-19 15:46:12,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574190592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:12,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1116678980] [2021-11-19 15:46:12,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:12,718 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:46:12,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:46:12,720 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:46:12,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 15:46:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:12,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:46:12,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 15:46:13,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 15:46:13,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1116678980] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:13,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937599854] [2021-11-19 15:46:13,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:13,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:46:13,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:46:13,789 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:46:13,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 15:46:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:13,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:46:13,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 15:46:14,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 15:46:14,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937599854] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:14,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:46:14,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-19 15:46:14,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401633916] [2021-11-19 15:46:14,663 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:46:14,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:46:14,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:14,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:46:14,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:46:14,664 INFO L87 Difference]: Start difference. First operand 10099 states and 15910 transitions. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 6 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-19 15:46:21,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:21,991 INFO L93 Difference]: Finished difference Result 37466 states and 61451 transitions. [2021-11-19 15:46:21,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 15:46:21,992 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 6 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) Word has length 147 [2021-11-19 15:46:21,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:22,222 INFO L225 Difference]: With dead ends: 37466 [2021-11-19 15:46:22,222 INFO L226 Difference]: Without dead ends: 27383 [2021-11-19 15:46:22,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-19 15:46:22,304 INFO L933 BasicCegarLoop]: 1368 mSDtfsCounter, 5949 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 4734 mSolverCounterSat, 1858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6047 SdHoareTripleChecker+Valid, 2860 SdHoareTripleChecker+Invalid, 6592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1858 IncrementalHoareTripleChecker+Valid, 4734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:22,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6047 Valid, 2860 Invalid, 6592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1858 Valid, 4734 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-19 15:46:22,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27383 states. [2021-11-19 15:46:23,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27383 to 24233. [2021-11-19 15:46:23,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24233 states, 18382 states have (on average 1.4999455989555) internal successors, (27572), 18811 states have internal predecessors, (27572), 4139 states have call successors, (4139), 1434 states have call predecessors, (4139), 1711 states have return successors, (6584), 4217 states have call predecessors, (6584), 4076 states have call successors, (6584) [2021-11-19 15:46:24,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24233 states to 24233 states and 38295 transitions. [2021-11-19 15:46:24,216 INFO L78 Accepts]: Start accepts. Automaton has 24233 states and 38295 transitions. Word has length 147 [2021-11-19 15:46:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:24,217 INFO L470 AbstractCegarLoop]: Abstraction has 24233 states and 38295 transitions. [2021-11-19 15:46:24,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 6 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-19 15:46:24,217 INFO L276 IsEmpty]: Start isEmpty. Operand 24233 states and 38295 transitions. [2021-11-19 15:46:24,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 15:46:24,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:24,223 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:24,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:24,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:24,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:24,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:24,836 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:46:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:24,837 INFO L85 PathProgramCache]: Analyzing trace with hash 100284943, now seen corresponding path program 1 times [2021-11-19 15:46:24,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:24,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161083485] [2021-11-19 15:46:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:24,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:24,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:24,842 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:24,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 15:46:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:25,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:46:25,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 15:46:25,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 15:46:26,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:26,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161083485] [2021-11-19 15:46:26,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161083485] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:26,020 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:46:26,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 15:46:26,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287983198] [2021-11-19 15:46:26,020 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:26,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 15:46:26,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:26,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 15:46:26,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:46:26,022 INFO L87 Difference]: Start difference. First operand 24233 states and 38295 transitions. Second operand has 12 states, 12 states have (on average 13.833333333333334) internal successors, (166), 12 states have internal predecessors, (166), 8 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-19 15:46:36,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:36,025 INFO L93 Difference]: Finished difference Result 74046 states and 124856 transitions. [2021-11-19 15:46:36,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 15:46:36,028 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.833333333333334) internal successors, (166), 12 states have internal predecessors, (166), 8 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 149 [2021-11-19 15:46:36,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:36,504 INFO L225 Difference]: With dead ends: 74046 [2021-11-19 15:46:36,504 INFO L226 Difference]: Without dead ends: 49745 [2021-11-19 15:46:36,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-11-19 15:46:36,878 INFO L933 BasicCegarLoop]: 1698 mSDtfsCounter, 4922 mSDsluCounter, 2327 mSDsCounter, 0 mSdLazyCounter, 6608 mSolverCounterSat, 1706 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5023 SdHoareTripleChecker+Valid, 4025 SdHoareTripleChecker+Invalid, 8314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1706 IncrementalHoareTripleChecker+Valid, 6608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:36,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5023 Valid, 4025 Invalid, 8314 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1706 Valid, 6608 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2021-11-19 15:46:36,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49745 states. [2021-11-19 15:46:40,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49745 to 43367. [2021-11-19 15:46:40,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43367 states, 31803 states have (on average 1.4892934628808603) internal successors, (47364), 32985 states have internal predecessors, (47364), 8653 states have call successors, (8653), 2187 states have call predecessors, (8653), 2910 states have return successors, (13996), 8994 states have call predecessors, (13996), 8554 states have call successors, (13996) [2021-11-19 15:46:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43367 states to 43367 states and 70013 transitions. [2021-11-19 15:46:41,047 INFO L78 Accepts]: Start accepts. Automaton has 43367 states and 70013 transitions. Word has length 149 [2021-11-19 15:46:41,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:41,048 INFO L470 AbstractCegarLoop]: Abstraction has 43367 states and 70013 transitions. [2021-11-19 15:46:41,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.833333333333334) internal successors, (166), 12 states have internal predecessors, (166), 8 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-19 15:46:41,049 INFO L276 IsEmpty]: Start isEmpty. Operand 43367 states and 70013 transitions. [2021-11-19 15:46:41,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 15:46:41,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:41,057 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:41,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:41,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:41,276 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:46:41,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:41,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2008748306, now seen corresponding path program 1 times [2021-11-19 15:46:41,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:41,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994835341] [2021-11-19 15:46:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:41,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:41,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:41,279 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:41,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 15:46:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:41,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 15:46:41,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:46:41,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 15:46:42,604 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:42,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994835341] [2021-11-19 15:46:42,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994835341] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:42,604 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:46:42,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 15:46:42,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7053230] [2021-11-19 15:46:42,605 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:42,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 15:46:42,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:42,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 15:46:42,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:46:42,607 INFO L87 Difference]: Start difference. First operand 43367 states and 70013 transitions. Second operand has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 8 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2021-11-19 15:46:51,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:51,861 INFO L93 Difference]: Finished difference Result 89434 states and 146461 transitions. [2021-11-19 15:46:51,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 15:46:51,862 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 8 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 149 [2021-11-19 15:46:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:52,568 INFO L225 Difference]: With dead ends: 89434 [2021-11-19 15:46:52,569 INFO L226 Difference]: Without dead ends: 52050 [2021-11-19 15:46:52,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-11-19 15:46:52,861 INFO L933 BasicCegarLoop]: 1113 mSDtfsCounter, 4824 mSDsluCounter, 1531 mSDsCounter, 0 mSdLazyCounter, 4431 mSolverCounterSat, 1200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4912 SdHoareTripleChecker+Valid, 2644 SdHoareTripleChecker+Invalid, 5631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1200 IncrementalHoareTripleChecker+Valid, 4431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:52,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4912 Valid, 2644 Invalid, 5631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1200 Valid, 4431 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-19 15:46:52,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52050 states. [2021-11-19 15:46:56,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52050 to 46688. [2021-11-19 15:46:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46688 states, 34206 states have (on average 1.4830731450622698) internal successors, (50730), 35550 states have internal predecessors, (50730), 9229 states have call successors, (9229), 2313 states have call predecessors, (9229), 3252 states have return successors, (15220), 9624 states have call predecessors, (15220), 9130 states have call successors, (15220) [2021-11-19 15:46:56,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46688 states to 46688 states and 75179 transitions. [2021-11-19 15:46:56,741 INFO L78 Accepts]: Start accepts. Automaton has 46688 states and 75179 transitions. Word has length 149 [2021-11-19 15:46:56,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:56,742 INFO L470 AbstractCegarLoop]: Abstraction has 46688 states and 75179 transitions. [2021-11-19 15:46:56,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 8 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2021-11-19 15:46:56,743 INFO L276 IsEmpty]: Start isEmpty. Operand 46688 states and 75179 transitions. [2021-11-19 15:46:56,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 15:46:56,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:56,750 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 15:46:56,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:56,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:56,964 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:46:56,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:56,965 INFO L85 PathProgramCache]: Analyzing trace with hash -884158546, now seen corresponding path program 1 times [2021-11-19 15:46:56,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:56,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068673617] [2021-11-19 15:46:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:56,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:56,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:56,966 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:56,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 15:46:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:57,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:46:57,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 15:46:57,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 15:46:58,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:58,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068673617] [2021-11-19 15:46:58,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068673617] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:46:58,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:46:58,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 18 [2021-11-19 15:46:58,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519739487] [2021-11-19 15:46:58,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:58,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:46:58,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:58,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:46:58,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-19 15:46:58,304 INFO L87 Difference]: Start difference. First operand 46688 states and 75179 transitions. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 9 states have internal predecessors, (106), 6 states have call successors, (18), 5 states have call predecessors, (18), 8 states have return successors, (18), 8 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-19 15:47:08,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:47:08,235 INFO L93 Difference]: Finished difference Result 88441 states and 144268 transitions. [2021-11-19 15:47:08,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 15:47:08,236 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 9 states have internal predecessors, (106), 6 states have call successors, (18), 5 states have call predecessors, (18), 8 states have return successors, (18), 8 states have call predecessors, (18), 6 states have call successors, (18) Word has length 151 [2021-11-19 15:47:08,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:47:08,623 INFO L225 Difference]: With dead ends: 88441 [2021-11-19 15:47:08,623 INFO L226 Difference]: Without dead ends: 47736 [2021-11-19 15:47:08,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-11-19 15:47:08,928 INFO L933 BasicCegarLoop]: 1433 mSDtfsCounter, 2700 mSDsluCounter, 3136 mSDsCounter, 0 mSdLazyCounter, 7091 mSolverCounterSat, 704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2811 SdHoareTripleChecker+Valid, 4569 SdHoareTripleChecker+Invalid, 7795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 7091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:47:08,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2811 Valid, 4569 Invalid, 7795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [704 Valid, 7091 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2021-11-19 15:47:08,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47736 states. [2021-11-19 15:47:11,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47736 to 46613. [2021-11-19 15:47:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46613 states, 34185 states have (on average 1.482141290039491) internal successors, (50667), 35505 states have internal predecessors, (50667), 9187 states have call successors, (9187), 2295 states have call predecessors, (9187), 3240 states have return successors, (15184), 9612 states have call predecessors, (15184), 9088 states have call successors, (15184) [2021-11-19 15:47:12,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46613 states to 46613 states and 75038 transitions. [2021-11-19 15:47:12,160 INFO L78 Accepts]: Start accepts. Automaton has 46613 states and 75038 transitions. Word has length 151 [2021-11-19 15:47:12,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:47:12,161 INFO L470 AbstractCegarLoop]: Abstraction has 46613 states and 75038 transitions. [2021-11-19 15:47:12,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 9 states have internal predecessors, (106), 6 states have call successors, (18), 5 states have call predecessors, (18), 8 states have return successors, (18), 8 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-19 15:47:12,161 INFO L276 IsEmpty]: Start isEmpty. Operand 46613 states and 75038 transitions. [2021-11-19 15:47:12,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-19 15:47:12,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:47:12,167 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:47:12,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 15:47:12,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:47:12,378 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:47:12,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:47:12,378 INFO L85 PathProgramCache]: Analyzing trace with hash 101561086, now seen corresponding path program 1 times [2021-11-19 15:47:12,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:47:12,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909015848] [2021-11-19 15:47:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:47:12,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:47:12,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:47:12,380 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:47:12,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31ba01ff-0fe8-4e57-84ab-3ad77033c90b/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 15:47:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:47:12,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 15:47:12,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:47:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:47:13,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:47:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 15:47:14,006 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:47:14,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909015848] [2021-11-19 15:47:14,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909015848] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:47:14,007 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:47:14,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 15:47:14,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699105484] [2021-11-19 15:47:14,007 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:47:14,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 15:47:14,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:47:14,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 15:47:14,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:47:14,009 INFO L87 Difference]: Start difference. First operand 46613 states and 75038 transitions. Second operand has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 12 states have internal predecessors, (157), 7 states have call successors, (30), 6 states have call predecessors, (30), 7 states have return successors, (29), 9 states have call predecessors, (29), 7 states have call successors, (29) [2021-11-19 15:47:27,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:47:27,860 INFO L93 Difference]: Finished difference Result 130948 states and 217619 transitions. [2021-11-19 15:47:27,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 15:47:27,861 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 12 states have internal predecessors, (157), 7 states have call successors, (30), 6 states have call predecessors, (30), 7 states have return successors, (29), 9 states have call predecessors, (29), 7 states have call successors, (29) Word has length 154 [2021-11-19 15:47:27,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:47:28,696 INFO L225 Difference]: With dead ends: 130948 [2021-11-19 15:47:28,696 INFO L226 Difference]: Without dead ends: 89808 [2021-11-19 15:47:29,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-19 15:47:29,027 INFO L933 BasicCegarLoop]: 1049 mSDtfsCounter, 4806 mSDsluCounter, 2450 mSDsCounter, 0 mSdLazyCounter, 7107 mSolverCounterSat, 1373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4902 SdHoareTripleChecker+Valid, 3499 SdHoareTripleChecker+Invalid, 8480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1373 IncrementalHoareTripleChecker+Valid, 7107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:47:29,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4902 Valid, 3499 Invalid, 8480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1373 Valid, 7107 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2021-11-19 15:47:29,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89808 states.