./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 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/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_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF --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-63182f1 [2021-11-12 23:39:30,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:39:30,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:39:30,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:39:30,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:39:30,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:39:30,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:39:30,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:39:30,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:39:30,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:39:30,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:39:30,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:39:30,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:39:30,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:39:30,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:39:30,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:39:30,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:39:30,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:39:30,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:39:30,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:39:30,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:39:30,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:39:30,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:39:30,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:39:30,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:39:30,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:39:30,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:39:30,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:39:30,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:39:30,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:39:30,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:39:30,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:39:30,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:39:30,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:39:30,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:39:30,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:39:30,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:39:30,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:39:30,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:39:30,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:39:30,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:39:30,263 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:39:30,311 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:39:30,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:39:30,315 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:39:30,316 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:39:30,316 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:39:30,316 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:39:30,316 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:39:30,317 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:39:30,317 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:39:30,320 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:39:30,324 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:39:30,324 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:39:30,324 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:39:30,324 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:39:30,325 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:39:30,325 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:39:30,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:39:30,326 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:39:30,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:39:30,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:39:30,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:39:30,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:39:30,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:39:30,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:39:30,327 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:39:30,328 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:39:30,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:39:30,328 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:39:30,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:39:30,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:39:30,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:39:30,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:39:30,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:39:30,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:39:30,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:39:30,331 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:39:30,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:39:30,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:39:30,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:39:30,332 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:39:30,332 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_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 [2021-11-12 23:39:30,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:39:30,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:39:30,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:39:30,648 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:39:30,652 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:39:30,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2021-11-12 23:39:30,737 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/data/01c2c8f71/ef08385351834067b203a163c34406b4/FLAGb42204a61 [2021-11-12 23:39:31,346 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:39:31,347 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2021-11-12 23:39:31,388 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/data/01c2c8f71/ef08385351834067b203a163c34406b4/FLAGb42204a61 [2021-11-12 23:39:31,585 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/data/01c2c8f71/ef08385351834067b203a163c34406b4 [2021-11-12 23:39:31,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:39:31,589 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:39:31,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:39:31,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:39:31,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:39:31,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:39:31" (1/1) ... [2021-11-12 23:39:31,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@152b4808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:31, skipping insertion in model container [2021-11-12 23:39:31,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:39:31" (1/1) ... [2021-11-12 23:39:31,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:39:31,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:39:32,148 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2021-11-12 23:39:32,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:39:32,267 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) [2021-11-12 23:39:32,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2fc45570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:32, skipping insertion in model container [2021-11-12 23:39:32,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:39:32,268 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:39:32,271 INFO L158 Benchmark]: Toolchain (without parser) took 680.30ms. Allocated memory is still 104.9MB. Free memory was 63.8MB in the beginning and 64.5MB in the end (delta: -764.9kB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. [2021-11-12 23:39:32,272 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 104.9MB. Free memory is still 83.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:39:32,274 INFO L158 Benchmark]: CACSL2BoogieTranslator took 677.50ms. Allocated memory is still 104.9MB. Free memory was 63.6MB in the beginning and 64.5MB in the end (delta: -963.2kB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. [2021-11-12 23:39:32,276 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 104.9MB. Free memory is still 83.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 677.50ms. Allocated memory is still 104.9MB. Free memory was 63.6MB in the beginning and 64.5MB in the end (delta: -963.2kB). Peak memory consumption was 10.8MB. 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_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/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_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF --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-63182f1 [2021-11-12 23:39:34,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:39:34,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:39:34,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:39:34,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:39:34,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:39:34,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:39:34,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:39:34,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:39:34,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:39:34,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:39:34,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:39:34,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:39:34,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:39:34,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:39:34,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:39:34,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:39:34,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:39:34,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:39:34,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:39:34,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:39:34,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:39:34,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:39:34,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:39:34,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:39:34,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:39:34,605 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:39:34,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:39:34,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:39:34,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:39:34,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:39:34,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:39:34,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:39:34,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:39:34,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:39:34,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:39:34,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:39:34,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:39:34,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:39:34,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:39:34,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:39:34,619 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:39:34,662 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:39:34,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:39:34,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:39:34,664 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:39:34,664 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:39:34,665 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:39:34,665 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:39:34,665 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:39:34,665 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:39:34,665 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:39:34,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:39:34,668 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:39:34,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:39:34,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:39:34,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:39:34,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:39:34,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:39:34,669 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:39:34,669 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:39:34,669 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:39:34,669 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:39:34,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:39:34,670 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:39:34,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:39:34,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:39:34,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:39:34,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:39:34,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:39:34,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:39:34,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:39:34,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:39:34,672 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:39:34,672 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:34,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:39:34,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:39:34,673 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:39:34,673 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_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 [2021-11-12 23:39:35,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:39:35,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:39:35,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:39:35,072 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:39:35,072 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:39:35,074 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2021-11-12 23:39:35,153 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/data/da95bf362/6a237d064a0046afbaadc4c2ec1867f6/FLAGc6f1f250c [2021-11-12 23:39:35,800 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:39:35,806 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2021-11-12 23:39:35,839 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/data/da95bf362/6a237d064a0046afbaadc4c2ec1867f6/FLAGc6f1f250c [2021-11-12 23:39:35,993 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/data/da95bf362/6a237d064a0046afbaadc4c2ec1867f6 [2021-11-12 23:39:35,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:39:35,999 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:39:36,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:39:36,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:39:36,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:39:36,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:39:35" (1/1) ... [2021-11-12 23:39:36,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8c4fa12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:36, skipping insertion in model container [2021-11-12 23:39:36,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:39:35" (1/1) ... [2021-11-12 23:39:36,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:39:36,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:39:36,601 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2021-11-12 23:39:36,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:39:36,698 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:39:36,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:39:36,815 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2021-11-12 23:39:36,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:39:36,861 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:39:36,980 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2021-11-12 23:39:37,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:39:37,060 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:39:37,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:37 WrapperNode [2021-11-12 23:39:37,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:39:37,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:39:37,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:39:37,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:39:37,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:37" (1/1) ... [2021-11-12 23:39:37,118 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:37" (1/1) ... [2021-11-12 23:39:37,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:39:37,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:39:37,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:39:37,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:39:37,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:37" (1/1) ... [2021-11-12 23:39:37,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:37" (1/1) ... [2021-11-12 23:39:37,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:37" (1/1) ... [2021-11-12 23:39:37,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:37" (1/1) ... [2021-11-12 23:39:37,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:37" (1/1) ... [2021-11-12 23:39:37,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:37" (1/1) ... [2021-11-12 23:39:37,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:37" (1/1) ... [2021-11-12 23:39:37,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:39:37,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:39:37,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:39:37,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:39:37,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:37" (1/1) ... [2021-11-12 23:39:37,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:39:37,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:39:37,365 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:39:37,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:39:37,410 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:39:37,412 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:39:37,413 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 23:39:37,413 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 23:39:37,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:39:37,413 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:39:37,413 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:39:37,414 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 23:39:37,414 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 23:39:37,414 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:39:37,414 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:39:37,414 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 23:39:37,414 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 23:39:37,415 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:39:37,415 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:39:37,415 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:39:37,415 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:39:37,415 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:39:37,416 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:39:37,416 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 23:39:37,416 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 23:39:37,416 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:39:37,416 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:39:37,416 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:39:37,417 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:39:37,417 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:39:37,417 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:39:37,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:39:37,417 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:39:37,418 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:39:37,418 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:39:37,419 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:39:37,419 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 23:39:37,419 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 23:39:37,419 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:39:37,419 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:39:37,420 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:39:37,420 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:39:37,420 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:39:37,420 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:39:37,420 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:39:37,421 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:39:37,421 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:39:37,421 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:39:37,421 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:39:37,421 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:39:37,421 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:39:37,422 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:39:37,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:39:37,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:39:37,424 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:39:37,425 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:39:37,425 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-12 23:39:37,425 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-12 23:39:41,330 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:39:41,330 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:39:41,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:39:41 BoogieIcfgContainer [2021-11-12 23:39:41,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:39:41,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:39:41,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:39:41,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:39:41,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:39:35" (1/3) ... [2021-11-12 23:39:41,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8afbc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:39:41, skipping insertion in model container [2021-11-12 23:39:41,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:37" (2/3) ... [2021-11-12 23:39:41,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8afbc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:39:41, skipping insertion in model container [2021-11-12 23:39:41,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:39:41" (3/3) ... [2021-11-12 23:39:41,342 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product28.cil.c [2021-11-12 23:39:41,347 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:39:41,348 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:39:41,412 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:39:41,421 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 [2021-11-12 23:39:41,422 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:39:41,474 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) [2021-11-12 23:39:41,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-12 23:39:41,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:41,495 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] [2021-11-12 23:39:41,495 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:41,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:41,501 INFO L85 PathProgramCache]: Analyzing trace with hash 861521184, now seen corresponding path program 1 times [2021-11-12 23:39:41,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:41,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858733290] [2021-11-12 23:39:41,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:41,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:41,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:41,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:41,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:39:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:42,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:39:42,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:39:42,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:39:42,604 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:42,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858733290] [2021-11-12 23:39:42,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858733290] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:42,605 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:42,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:39:42,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736464683] [2021-11-12 23:39:42,608 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:42,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:39:42,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:42,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:39:42,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:39:42,642 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) [2021-11-12 23:39:42,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:42,919 INFO L93 Difference]: Finished difference Result 1103 states and 1828 transitions. [2021-11-12 23:39:42,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:39:42,934 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 [2021-11-12 23:39:42,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:42,971 INFO L225 Difference]: With dead ends: 1103 [2021-11-12 23:39:42,972 INFO L226 Difference]: Without dead ends: 549 [2021-11-12 23:39:42,987 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 [2021-11-12 23:39:42,997 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 32 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1788 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.48ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:42,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1788 Invalid, 41 Unknown, 0 Unchecked, 29.48ms Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 67.75ms Time] [2021-11-12 23:39:43,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-12 23:39:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-12 23:39:43,116 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) [2021-11-12 23:39:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 896 transitions. [2021-11-12 23:39:43,128 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 896 transitions. Word has length 63 [2021-11-12 23:39:43,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:43,128 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 896 transitions. [2021-11-12 23:39:43,129 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) [2021-11-12 23:39:43,129 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 896 transitions. [2021-11-12 23:39:43,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:39:43,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:43,134 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] [2021-11-12 23:39:43,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:43,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:43,351 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:43,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:43,352 INFO L85 PathProgramCache]: Analyzing trace with hash 169835, now seen corresponding path program 1 times [2021-11-12 23:39:43,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:43,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693244605] [2021-11-12 23:39:43,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:43,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:43,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:43,355 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:43,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:39:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:43,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:39:43,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:39:44,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:39:44,392 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:44,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693244605] [2021-11-12 23:39:44,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693244605] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:44,393 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:44,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:39:44,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588569499] [2021-11-12 23:39:44,393 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:44,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:39:44,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:44,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:39:44,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:39:44,399 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) [2021-11-12 23:39:44,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:44,698 INFO L93 Difference]: Finished difference Result 1086 states and 1784 transitions. [2021-11-12 23:39:44,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:39:44,700 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 [2021-11-12 23:39:44,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:44,708 INFO L225 Difference]: With dead ends: 1086 [2021-11-12 23:39:44,709 INFO L226 Difference]: Without dead ends: 558 [2021-11-12 23:39:44,713 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 [2021-11-12 23:39:44,714 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 193 mSDsluCounter, 6058 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 6938 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.78ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 164.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:44,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 6938 Invalid, 105 Unknown, 0 Unchecked, 30.78ms Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 164.38ms Time] [2021-11-12 23:39:44,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-12 23:39:44,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-11-12 23:39:44,791 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) [2021-11-12 23:39:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 910 transitions. [2021-11-12 23:39:44,799 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 910 transitions. Word has length 68 [2021-11-12 23:39:44,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:44,800 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 910 transitions. [2021-11-12 23:39:44,800 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) [2021-11-12 23:39:44,800 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 910 transitions. [2021-11-12 23:39:44,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 23:39:44,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:44,804 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] [2021-11-12 23:39:44,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 23:39:45,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:45,020 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:45,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:45,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1884875238, now seen corresponding path program 1 times [2021-11-12 23:39:45,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:45,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966705175] [2021-11-12 23:39:45,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:45,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:45,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:45,026 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:45,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:39:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:45,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:39:45,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:39:45,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:39:45,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:45,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966705175] [2021-11-12 23:39:45,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966705175] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:45,861 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:45,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:39:45,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414137950] [2021-11-12 23:39:45,861 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:45,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:39:45,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:45,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:39:45,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:39:45,863 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) [2021-11-12 23:39:46,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:46,152 INFO L93 Difference]: Finished difference Result 1142 states and 1875 transitions. [2021-11-12 23:39:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:39:46,153 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 [2021-11-12 23:39:46,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:46,160 INFO L225 Difference]: With dead ends: 1142 [2021-11-12 23:39:46,160 INFO L226 Difference]: Without dead ends: 572 [2021-11-12 23:39:46,165 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 [2021-11-12 23:39:46,166 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 230 mSDsluCounter, 1656 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 175.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 2497 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.14ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 203.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:46,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 2497 Invalid, 197 Unknown, 0 Unchecked, 10.14ms Time], IncrementalHoareTripleChecker [35 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 203.14ms Time] [2021-11-12 23:39:46,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-12 23:39:46,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 563. [2021-11-12 23:39:46,194 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) [2021-11-12 23:39:46,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 892 transitions. [2021-11-12 23:39:46,203 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 892 transitions. Word has length 69 [2021-11-12 23:39:46,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:46,204 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 892 transitions. [2021-11-12 23:39:46,204 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) [2021-11-12 23:39:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 892 transitions. [2021-11-12 23:39:46,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:39:46,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:46,207 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] [2021-11-12 23:39:46,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-12 23:39:46,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:46,420 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:46,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:46,421 INFO L85 PathProgramCache]: Analyzing trace with hash -2064383585, now seen corresponding path program 1 times [2021-11-12 23:39:46,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:46,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308006062] [2021-11-12 23:39:46,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:46,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:46,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:46,423 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:46,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:39:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:46,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:39:46,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:39:47,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:39:47,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:47,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308006062] [2021-11-12 23:39:47,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308006062] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:47,332 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:47,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:39:47,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228343928] [2021-11-12 23:39:47,333 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:47,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:39:47,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:47,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:39:47,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:39:47,334 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) [2021-11-12 23:39:47,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:47,537 INFO L93 Difference]: Finished difference Result 1084 states and 1738 transitions. [2021-11-12 23:39:47,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:39:47,539 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 [2021-11-12 23:39:47,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:47,545 INFO L225 Difference]: With dead ends: 1084 [2021-11-12 23:39:47,545 INFO L226 Difference]: Without dead ends: 551 [2021-11-12 23:39:47,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:39:47,551 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 86 mSDsluCounter, 5011 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 5872 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.37ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 135.36ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:47,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 5872 Invalid, 80 Unknown, 0 Unchecked, 13.37ms Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 135.36ms Time] [2021-11-12 23:39:47,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-11-12 23:39:47,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 542. [2021-11-12 23:39:47,577 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) [2021-11-12 23:39:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 864 transitions. [2021-11-12 23:39:47,585 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 864 transitions. Word has length 71 [2021-11-12 23:39:47,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:47,585 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 864 transitions. [2021-11-12 23:39:47,586 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) [2021-11-12 23:39:47,586 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 864 transitions. [2021-11-12 23:39:47,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 23:39:47,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:47,588 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] [2021-11-12 23:39:47,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:47,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:47,804 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:47,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:47,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1339541112, now seen corresponding path program 1 times [2021-11-12 23:39:47,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:47,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364461541] [2021-11-12 23:39:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:47,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:47,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:47,807 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:47,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:39:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:48,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:39:48,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:39:48,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:39:48,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:48,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364461541] [2021-11-12 23:39:48,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364461541] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:48,869 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:48,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:39:48,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672801908] [2021-11-12 23:39:48,870 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:48,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:39:48,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:48,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:39:48,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:39:48,871 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) [2021-11-12 23:39:49,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:49,219 INFO L93 Difference]: Finished difference Result 1053 states and 1693 transitions. [2021-11-12 23:39:49,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:39:49,221 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 [2021-11-12 23:39:49,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:49,227 INFO L225 Difference]: With dead ends: 1053 [2021-11-12 23:39:49,227 INFO L226 Difference]: Without dead ends: 547 [2021-11-12 23:39:49,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:39:49,231 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 74 mSDsluCounter, 6542 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 221.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 7363 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.47ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 247.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:49,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 7363 Invalid, 216 Unknown, 0 Unchecked, 13.47ms Time], IncrementalHoareTripleChecker [4 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 247.13ms Time] [2021-11-12 23:39:49,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-12 23:39:49,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 544. [2021-11-12 23:39:49,253 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) [2021-11-12 23:39:49,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 865 transitions. [2021-11-12 23:39:49,260 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 865 transitions. Word has length 74 [2021-11-12 23:39:49,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:49,261 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 865 transitions. [2021-11-12 23:39:49,261 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) [2021-11-12 23:39:49,261 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 865 transitions. [2021-11-12 23:39:49,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 23:39:49,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:49,263 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] [2021-11-12 23:39:49,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:49,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:49,486 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:49,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:49,487 INFO L85 PathProgramCache]: Analyzing trace with hash 102707193, now seen corresponding path program 1 times [2021-11-12 23:39:49,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:49,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085730331] [2021-11-12 23:39:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:49,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:49,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:49,490 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:49,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:39:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:49,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:39:49,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:39:50,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:39:50,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:50,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085730331] [2021-11-12 23:39:50,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085730331] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:50,523 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:50,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-12 23:39:50,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279819193] [2021-11-12 23:39:50,523 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:50,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:39:50,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:50,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:39:50,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:39:50,525 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) [2021-11-12 23:39:51,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:51,584 INFO L93 Difference]: Finished difference Result 2019 states and 3294 transitions. [2021-11-12 23:39:51,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:39:51,586 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 [2021-11-12 23:39:51,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:51,604 INFO L225 Difference]: With dead ends: 2019 [2021-11-12 23:39:51,604 INFO L226 Difference]: Without dead ends: 1518 [2021-11-12 23:39:51,608 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 [2021-11-12 23:39:51,612 INFO L933 BasicCegarLoop]: 1099 mSDtfsCounter, 1568 mSDsluCounter, 1942 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 814.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1568 SdHoareTripleChecker+Valid, 3041 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.89ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 952.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:51,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1568 Valid, 3041 Invalid, 260 Unknown, 0 Unchecked, 12.89ms Time], IncrementalHoareTripleChecker [7 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 952.13ms Time] [2021-11-12 23:39:51,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-11-12 23:39:51,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1392. [2021-11-12 23:39:51,689 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) [2021-11-12 23:39:51,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 2263 transitions. [2021-11-12 23:39:51,703 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 2263 transitions. Word has length 75 [2021-11-12 23:39:51,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:51,704 INFO L470 AbstractCegarLoop]: Abstraction has 1392 states and 2263 transitions. [2021-11-12 23:39:51,704 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) [2021-11-12 23:39:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 2263 transitions. [2021-11-12 23:39:51,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 23:39:51,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:51,715 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] [2021-11-12 23:39:51,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-12 23:39:51,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:51,933 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:51,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:51,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1304070991, now seen corresponding path program 1 times [2021-11-12 23:39:51,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:51,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910258475] [2021-11-12 23:39:51,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:51,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:51,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:51,936 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:51,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:39:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:52,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:39:52,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:39:52,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:39:53,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:53,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910258475] [2021-11-12 23:39:53,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910258475] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:39:53,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:39:53,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:39:53,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628644706] [2021-11-12 23:39:53,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:53,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:39:53,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:53,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:39:53,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:39:53,284 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) [2021-11-12 23:39:55,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:57,321 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:58,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:58,500 INFO L93 Difference]: Finished difference Result 2753 states and 4586 transitions. [2021-11-12 23:39:58,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:39:58,504 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 [2021-11-12 23:39:58,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:58,519 INFO L225 Difference]: With dead ends: 2753 [2021-11-12 23:39:58,519 INFO L226 Difference]: Without dead ends: 1404 [2021-11-12 23:39:58,530 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 [2021-11-12 23:39:58,532 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 776 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4875.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.26ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5050.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:58,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [794 Valid, 2082 Invalid, 452 Unknown, 0 Unchecked, 9.26ms Time], IncrementalHoareTripleChecker [16 Valid, 434 Invalid, 2 Unknown, 0 Unchecked, 5050.72ms Time] [2021-11-12 23:39:58,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-11-12 23:39:58,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1404. [2021-11-12 23:39:58,615 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) [2021-11-12 23:39:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 2275 transitions. [2021-11-12 23:39:58,633 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 2275 transitions. Word has length 128 [2021-11-12 23:39:58,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:58,634 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 2275 transitions. [2021-11-12 23:39:58,634 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) [2021-11-12 23:39:58,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 2275 transitions. [2021-11-12 23:39:58,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-12 23:39:58,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:58,640 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] [2021-11-12 23:39:58,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:58,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:58,856 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:58,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1252013686, now seen corresponding path program 1 times [2021-11-12 23:39:58,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:58,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497091510] [2021-11-12 23:39:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:58,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:58,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:58,859 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:58,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:39:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:59,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:39:59,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:39:59,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 23:40:00,164 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:00,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497091510] [2021-11-12 23:40:00,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497091510] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:40:00,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:40:00,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-12 23:40:00,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577434486] [2021-11-12 23:40:00,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:00,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:40:00,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:00,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:40:00,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:40:00,169 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) [2021-11-12 23:40:02,197 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:02,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:02,926 INFO L93 Difference]: Finished difference Result 2979 states and 4792 transitions. [2021-11-12 23:40:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:40:02,927 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 [2021-11-12 23:40:02,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:02,960 INFO L225 Difference]: With dead ends: 2979 [2021-11-12 23:40:02,960 INFO L226 Difference]: Without dead ends: 1618 [2021-11-12 23:40:02,970 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 [2021-11-12 23:40:02,971 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 615 mSDsluCounter, 2733 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2541.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 3661 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.05ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2623.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:02,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 3661 Invalid, 203 Unknown, 0 Unchecked, 10.05ms Time], IncrementalHoareTripleChecker [18 Valid, 184 Invalid, 1 Unknown, 0 Unchecked, 2623.59ms Time] [2021-11-12 23:40:02,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2021-11-12 23:40:03,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1612. [2021-11-12 23:40:03,051 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) [2021-11-12 23:40:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2534 transitions. [2021-11-12 23:40:03,063 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2534 transitions. Word has length 130 [2021-11-12 23:40:03,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:03,064 INFO L470 AbstractCegarLoop]: Abstraction has 1612 states and 2534 transitions. [2021-11-12 23:40:03,064 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) [2021-11-12 23:40:03,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2534 transitions. [2021-11-12 23:40:03,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 23:40:03,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:03,070 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] [2021-11-12 23:40:03,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:03,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:03,293 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:03,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:03,293 INFO L85 PathProgramCache]: Analyzing trace with hash 114714719, now seen corresponding path program 1 times [2021-11-12 23:40:03,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:03,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079905753] [2021-11-12 23:40:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:03,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:03,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:03,297 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:03,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:40:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:03,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:40:03,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:40:04,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:40:04,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:04,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079905753] [2021-11-12 23:40:04,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079905753] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:40:04,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:40:04,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:40:04,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928512346] [2021-11-12 23:40:04,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:04,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:40:04,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:04,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:40:04,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:40:04,745 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) [2021-11-12 23:40:06,774 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:08,780 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:09,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:09,814 INFO L93 Difference]: Finished difference Result 3206 states and 5186 transitions. [2021-11-12 23:40:09,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:40:09,815 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 [2021-11-12 23:40:09,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:09,831 INFO L225 Difference]: With dead ends: 3206 [2021-11-12 23:40:09,831 INFO L226 Difference]: Without dead ends: 1637 [2021-11-12 23:40:09,872 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 [2021-11-12 23:40:09,874 INFO L933 BasicCegarLoop]: 814 mSDtfsCounter, 783 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4815.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.78ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4963.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:09,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 2083 Invalid, 454 Unknown, 0 Unchecked, 6.78ms Time], IncrementalHoareTripleChecker [14 Valid, 438 Invalid, 2 Unknown, 0 Unchecked, 4963.38ms Time] [2021-11-12 23:40:09,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-11-12 23:40:09,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1637. [2021-11-12 23:40:09,957 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) [2021-11-12 23:40:09,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 2558 transitions. [2021-11-12 23:40:09,968 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 2558 transitions. Word has length 131 [2021-11-12 23:40:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:09,969 INFO L470 AbstractCegarLoop]: Abstraction has 1637 states and 2558 transitions. [2021-11-12 23:40:09,970 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) [2021-11-12 23:40:09,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 2558 transitions. [2021-11-12 23:40:09,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 23:40:09,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:09,975 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] [2021-11-12 23:40:09,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:10,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:10,188 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:10,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:10,188 INFO L85 PathProgramCache]: Analyzing trace with hash -757109523, now seen corresponding path program 1 times [2021-11-12 23:40:10,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:10,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007030647] [2021-11-12 23:40:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:10,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:10,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:10,190 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:10,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:40:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:10,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:40:10,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:40:10,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:40:11,457 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:11,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007030647] [2021-11-12 23:40:11,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007030647] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:40:11,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:40:11,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:40:11,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927101600] [2021-11-12 23:40:11,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:11,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:40:11,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:11,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:40:11,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:40:11,459 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) [2021-11-12 23:40:13,493 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:15,500 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:16,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:16,555 INFO L93 Difference]: Finished difference Result 3261 states and 5235 transitions. [2021-11-12 23:40:16,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:40:16,556 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 [2021-11-12 23:40:16,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:16,571 INFO L225 Difference]: With dead ends: 3261 [2021-11-12 23:40:16,571 INFO L226 Difference]: Without dead ends: 1667 [2021-11-12 23:40:16,621 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 [2021-11-12 23:40:16,622 INFO L933 BasicCegarLoop]: 814 mSDtfsCounter, 786 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4850.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.26ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4979.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:16,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 2083 Invalid, 453 Unknown, 0 Unchecked, 7.26ms Time], IncrementalHoareTripleChecker [12 Valid, 439 Invalid, 2 Unknown, 0 Unchecked, 4979.72ms Time] [2021-11-12 23:40:16,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2021-11-12 23:40:16,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1667. [2021-11-12 23:40:16,698 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) [2021-11-12 23:40:16,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2587 transitions. [2021-11-12 23:40:16,706 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2587 transitions. Word has length 134 [2021-11-12 23:40:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:16,707 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 2587 transitions. [2021-11-12 23:40:16,707 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) [2021-11-12 23:40:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2587 transitions. [2021-11-12 23:40:16,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 23:40:16,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:16,713 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] [2021-11-12 23:40:16,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:16,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:16,931 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:16,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:16,932 INFO L85 PathProgramCache]: Analyzing trace with hash -404367597, now seen corresponding path program 1 times [2021-11-12 23:40:16,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:16,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888973901] [2021-11-12 23:40:16,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:16,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:16,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:16,934 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:16,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:40:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:17,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:40:17,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:40:17,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:40:18,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:18,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888973901] [2021-11-12 23:40:18,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888973901] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:40:18,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:40:18,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:40:18,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480578048] [2021-11-12 23:40:18,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:18,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:40:18,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:18,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:40:18,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:40:18,273 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) [2021-11-12 23:40:20,301 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:22,308 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:23,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:23,217 INFO L93 Difference]: Finished difference Result 3326 states and 5294 transitions. [2021-11-12 23:40:23,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:40:23,218 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 [2021-11-12 23:40:23,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:23,250 INFO L225 Difference]: With dead ends: 3326 [2021-11-12 23:40:23,250 INFO L226 Difference]: Without dead ends: 1702 [2021-11-12 23:40:23,260 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 [2021-11-12 23:40:23,261 INFO L933 BasicCegarLoop]: 814 mSDtfsCounter, 783 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4734.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.32ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4854.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:23,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 2083 Invalid, 452 Unknown, 0 Unchecked, 5.32ms Time], IncrementalHoareTripleChecker [10 Valid, 440 Invalid, 2 Unknown, 0 Unchecked, 4854.16ms Time] [2021-11-12 23:40:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2021-11-12 23:40:23,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1702. [2021-11-12 23:40:23,336 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) [2021-11-12 23:40:23,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 2621 transitions. [2021-11-12 23:40:23,346 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 2621 transitions. Word has length 137 [2021-11-12 23:40:23,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:23,346 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 2621 transitions. [2021-11-12 23:40:23,347 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) [2021-11-12 23:40:23,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 2621 transitions. [2021-11-12 23:40:23,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-12 23:40:23,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:23,352 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] [2021-11-12 23:40:23,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:23,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:23,570 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:23,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:23,570 INFO L85 PathProgramCache]: Analyzing trace with hash 13797161, now seen corresponding path program 1 times [2021-11-12 23:40:23,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:23,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138189306] [2021-11-12 23:40:23,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:23,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:23,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:23,572 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:23,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:40:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:23,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:40:23,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:24,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:40:25,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:25,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138189306] [2021-11-12 23:40:25,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138189306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:25,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [35445960] [2021-11-12 23:40:25,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:25,291 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:25,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:40:25,292 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:40:25,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 23:40:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:25,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:40:25,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:40:25,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:40:26,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [35445960] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:26,139 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:40:26,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 23:40:26,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358410921] [2021-11-12 23:40:26,140 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:26,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:40:26,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:26,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:40:26,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:40:26,141 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) [2021-11-12 23:40:26,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:26,295 INFO L93 Difference]: Finished difference Result 5004 states and 7833 transitions. [2021-11-12 23:40:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:40:26,296 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 [2021-11-12 23:40:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:26,324 INFO L225 Difference]: With dead ends: 5004 [2021-11-12 23:40:26,324 INFO L226 Difference]: Without dead ends: 3348 [2021-11-12 23:40:26,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:40:26,336 INFO L933 BasicCegarLoop]: 1033 mSDtfsCounter, 845 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.22ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:26,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 1845 Invalid, 8 Unknown, 0 Unchecked, 4.22ms Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 34.61ms Time] [2021-11-12 23:40:26,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-11-12 23:40:26,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 3336. [2021-11-12 23:40:26,532 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) [2021-11-12 23:40:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 5193 transitions. [2021-11-12 23:40:26,554 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 5193 transitions. Word has length 140 [2021-11-12 23:40:26,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:26,555 INFO L470 AbstractCegarLoop]: Abstraction has 3336 states and 5193 transitions. [2021-11-12 23:40:26,555 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) [2021-11-12 23:40:26,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 5193 transitions. [2021-11-12 23:40:26,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-12 23:40:26,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:26,563 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] [2021-11-12 23:40:26,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:26,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:26,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:26,981 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:26,981 INFO L85 PathProgramCache]: Analyzing trace with hash 408163947, now seen corresponding path program 1 times [2021-11-12 23:40:26,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:26,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996195748] [2021-11-12 23:40:26,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:26,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:26,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:26,984 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:26,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:40:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:27,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:40:27,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:27,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:28,717 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:40:28,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:28,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996195748] [2021-11-12 23:40:28,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996195748] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:28,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1443285593] [2021-11-12 23:40:28,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:28,718 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:28,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:40:28,719 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:40:28,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-12 23:40:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:29,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:40:29,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:29,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:40:30,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1443285593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:30,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742930843] [2021-11-12 23:40:30,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:30,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:40:30,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:40:30,092 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:40:30,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-12 23:40:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:30,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:40:30,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:30,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:40:31,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742930843] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:31,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:40:31,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-12 23:40:31,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135434675] [2021-11-12 23:40:31,322 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:40:31,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:40:31,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:31,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:40:31,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:40:31,329 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) [2021-11-12 23:40:33,358 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:35,364 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:37,370 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:39,376 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:41,383 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:43,390 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:55,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:55,753 INFO L93 Difference]: Finished difference Result 11289 states and 18257 transitions. [2021-11-12 23:40:55,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:40:55,755 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 [2021-11-12 23:40:55,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:55,823 INFO L225 Difference]: With dead ends: 11289 [2021-11-12 23:40:55,823 INFO L226 Difference]: Without dead ends: 7996 [2021-11-12 23:40:55,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 820 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-11-12 23:40:55,874 INFO L933 BasicCegarLoop]: 1630 mSDtfsCounter, 6912 mSDsluCounter, 4678 mSDsCounter, 0 mSdLazyCounter, 9870 mSolverCounterSat, 2693 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22185.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6992 SdHoareTripleChecker+Valid, 6308 SdHoareTripleChecker+Invalid, 12569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 73.58ms SdHoareTripleChecker+Time, 2693 IncrementalHoareTripleChecker+Valid, 9870 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23694.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:55,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6992 Valid, 6308 Invalid, 12569 Unknown, 0 Unchecked, 73.58ms Time], IncrementalHoareTripleChecker [2693 Valid, 9870 Invalid, 6 Unknown, 0 Unchecked, 23694.50ms Time] [2021-11-12 23:40:55,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7996 states. [2021-11-12 23:40:56,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7996 to 7060. [2021-11-12 23:40:56,373 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) [2021-11-12 23:40:56,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7060 states to 7060 states and 11085 transitions. [2021-11-12 23:40:56,457 INFO L78 Accepts]: Start accepts. Automaton has 7060 states and 11085 transitions. Word has length 140 [2021-11-12 23:40:56,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:56,459 INFO L470 AbstractCegarLoop]: Abstraction has 7060 states and 11085 transitions. [2021-11-12 23:40:56,460 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) [2021-11-12 23:40:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 7060 states and 11085 transitions. [2021-11-12 23:40:56,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-12 23:40:56,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:56,470 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:56,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:56,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:56,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:57,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:40:57,074 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:57,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:57,075 INFO L85 PathProgramCache]: Analyzing trace with hash -478835743, now seen corresponding path program 1 times [2021-11-12 23:40:57,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:57,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579994179] [2021-11-12 23:40:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:57,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:57,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:57,076 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:57,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:40:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:57,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:40:57,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:40:57,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:40:58,454 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:58,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579994179] [2021-11-12 23:40:58,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579994179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:58,455 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:58,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 23:40:58,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397723956] [2021-11-12 23:40:58,455 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:58,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:40:58,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:58,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:40:58,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:40:58,456 INFO L87 Difference]: Start difference. First operand 7060 states and 11085 transitions. Second operand has 10 states, 9 states have (on average 15.222222222222221) internal successors, (137), 9 states have internal predecessors, (137), 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) [2021-11-12 23:40:59,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:59,034 INFO L93 Difference]: Finished difference Result 13784 states and 21684 transitions. [2021-11-12 23:40:59,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:40:59,035 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 15.222222222222221) internal successors, (137), 9 states have internal predecessors, (137), 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 [2021-11-12 23:40:59,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:59,107 INFO L225 Difference]: With dead ends: 13784 [2021-11-12 23:40:59,107 INFO L226 Difference]: Without dead ends: 6757 [2021-11-12 23:40:59,134 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 [2021-11-12 23:40:59,135 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 80 mSDsluCounter, 4885 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 181.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 5706 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.95ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 201.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:59,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 5706 Invalid, 147 Unknown, 0 Unchecked, 5.95ms Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 201.28ms Time] [2021-11-12 23:40:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6757 states. [2021-11-12 23:40:59,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6757 to 6727. [2021-11-12 23:40:59,520 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) [2021-11-12 23:40:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6727 states to 6727 states and 10574 transitions. [2021-11-12 23:40:59,563 INFO L78 Accepts]: Start accepts. Automaton has 6727 states and 10574 transitions. Word has length 143 [2021-11-12 23:40:59,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:59,563 INFO L470 AbstractCegarLoop]: Abstraction has 6727 states and 10574 transitions. [2021-11-12 23:40:59,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 15.222222222222221) internal successors, (137), 9 states have internal predecessors, (137), 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) [2021-11-12 23:40:59,563 INFO L276 IsEmpty]: Start isEmpty. Operand 6727 states and 10574 transitions. [2021-11-12 23:40:59,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-12 23:40:59,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:59,569 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] [2021-11-12 23:40:59,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:59,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:59,792 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:59,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:59,792 INFO L85 PathProgramCache]: Analyzing trace with hash 2100732710, now seen corresponding path program 1 times [2021-11-12 23:40:59,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:59,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275295571] [2021-11-12 23:40:59,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:59,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:59,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:59,793 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:59,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:41:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:00,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:41:00,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:41:00,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 23:41:01,392 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:01,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275295571] [2021-11-12 23:41:01,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275295571] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:01,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [718299518] [2021-11-12 23:41:01,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:01,393 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:01,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:41:01,399 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:41:01,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 23:41:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:01,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:41:01,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:41:02,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 23:41:02,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [718299518] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:02,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020543092] [2021-11-12 23:41:02,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:02,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:02,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:41:02,731 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:41:02,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-12 23:41:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:02,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:41:03,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:41:03,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 23:41:04,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020543092] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:04,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:41:04,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-12 23:41:04,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585879495] [2021-11-12 23:41:04,034 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:41:04,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:41:04,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:04,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:41:04,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:41:04,036 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) [2021-11-12 23:41:06,072 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:08,080 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:10,086 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:12,093 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:14,099 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:16,105 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:25,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:25,971 INFO L93 Difference]: Finished difference Result 17172 states and 27644 transitions. [2021-11-12 23:41:25,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:41:25,972 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 [2021-11-12 23:41:25,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:26,032 INFO L225 Difference]: With dead ends: 17172 [2021-11-12 23:41:26,032 INFO L226 Difference]: Without dead ends: 10485 [2021-11-12 23:41:26,077 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 [2021-11-12 23:41:26,078 INFO L933 BasicCegarLoop]: 1545 mSDtfsCounter, 3830 mSDsluCounter, 3476 mSDsCounter, 0 mSdLazyCounter, 6982 mSolverCounterSat, 1186 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19947.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3901 SdHoareTripleChecker+Valid, 5021 SdHoareTripleChecker+Invalid, 8174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 51.59ms SdHoareTripleChecker+Time, 1186 IncrementalHoareTripleChecker+Valid, 6982 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21128.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:26,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3901 Valid, 5021 Invalid, 8174 Unknown, 0 Unchecked, 51.59ms Time], IncrementalHoareTripleChecker [1186 Valid, 6982 Invalid, 6 Unknown, 0 Unchecked, 21128.34ms Time] [2021-11-12 23:41:26,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10485 states. [2021-11-12 23:41:26,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10485 to 10099. [2021-11-12 23:41:26,837 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) [2021-11-12 23:41:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10099 states to 10099 states and 15910 transitions. [2021-11-12 23:41:26,920 INFO L78 Accepts]: Start accepts. Automaton has 10099 states and 15910 transitions. Word has length 146 [2021-11-12 23:41:26,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:26,921 INFO L470 AbstractCegarLoop]: Abstraction has 10099 states and 15910 transitions. [2021-11-12 23:41:26,922 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) [2021-11-12 23:41:26,922 INFO L276 IsEmpty]: Start isEmpty. Operand 10099 states and 15910 transitions. [2021-11-12 23:41:26,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 23:41:26,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:26,929 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] [2021-11-12 23:41:26,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:27,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:27,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-12 23:41:27,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:27,544 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:27,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:27,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1191847912, now seen corresponding path program 1 times [2021-11-12 23:41:27,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:27,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383801367] [2021-11-12 23:41:27,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:27,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:27,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:27,548 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:27,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:41:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:28,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:41:28,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:41:28,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:41:28,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:28,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383801367] [2021-11-12 23:41:28,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383801367] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:28,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1028165206] [2021-11-12 23:41:28,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:28,946 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:28,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:41:28,947 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:41:28,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 23:41:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:29,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:41:29,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:41:29,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:41:30,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1028165206] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:30,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873168606] [2021-11-12 23:41:30,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:30,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:30,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:41:30,168 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:41:30,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-12 23:41:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:30,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:41:30,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:41:30,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:41:31,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873168606] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:31,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:41:31,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-12 23:41:31,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978805272] [2021-11-12 23:41:31,396 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:41:31,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:41:31,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:31,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:41:31,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:41:31,398 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) [2021-11-12 23:41:33,427 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:35,434 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:44,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:44,788 INFO L93 Difference]: Finished difference Result 37466 states and 61451 transitions. [2021-11-12 23:41:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:41:44,790 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 [2021-11-12 23:41:44,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:44,999 INFO L225 Difference]: With dead ends: 37466 [2021-11-12 23:41:44,999 INFO L226 Difference]: Without dead ends: 27383 [2021-11-12 23:41:45,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:41:45,098 INFO L933 BasicCegarLoop]: 1368 mSDtfsCounter, 5949 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 4729 mSolverCounterSat, 1865 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10778.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6048 SdHoareTripleChecker+Valid, 2841 SdHoareTripleChecker+Invalid, 6596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 44.94ms SdHoareTripleChecker+Time, 1865 IncrementalHoareTripleChecker+Valid, 4729 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11798.85ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:45,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6048 Valid, 2841 Invalid, 6596 Unknown, 0 Unchecked, 44.94ms Time], IncrementalHoareTripleChecker [1865 Valid, 4729 Invalid, 2 Unknown, 0 Unchecked, 11798.85ms Time] [2021-11-12 23:41:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27383 states. [2021-11-12 23:41:46,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27383 to 24233. [2021-11-12 23:41:46,953 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) [2021-11-12 23:41:47,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24233 states to 24233 states and 38295 transitions. [2021-11-12 23:41:47,158 INFO L78 Accepts]: Start accepts. Automaton has 24233 states and 38295 transitions. Word has length 147 [2021-11-12 23:41:47,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:47,159 INFO L470 AbstractCegarLoop]: Abstraction has 24233 states and 38295 transitions. [2021-11-12 23:41:47,159 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) [2021-11-12 23:41:47,159 INFO L276 IsEmpty]: Start isEmpty. Operand 24233 states and 38295 transitions. [2021-11-12 23:41:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-12 23:41:47,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:47,169 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] [2021-11-12 23:41:47,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:47,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:47,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-12 23:41:47,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:47,774 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:47,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:47,776 INFO L85 PathProgramCache]: Analyzing trace with hash 100284943, now seen corresponding path program 1 times [2021-11-12 23:41:47,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:47,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240409754] [2021-11-12 23:41:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:47,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:47,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:47,778 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:47,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:41:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:48,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:41:48,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:41:48,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 23:41:49,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:49,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240409754] [2021-11-12 23:41:49,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240409754] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:49,265 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:49,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 23:41:49,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621187552] [2021-11-12 23:41:49,265 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:49,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:41:49,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:49,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:41:49,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:41:49,267 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) [2021-11-12 23:41:51,290 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:53,298 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:55,306 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:57,312 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:10,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:10,135 INFO L93 Difference]: Finished difference Result 74046 states and 124856 transitions. [2021-11-12 23:42:10,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:42:10,136 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 [2021-11-12 23:42:10,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:10,776 INFO L225 Difference]: With dead ends: 74046 [2021-11-12 23:42:10,776 INFO L226 Difference]: Without dead ends: 49745 [2021-11-12 23:42:11,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:42:11,028 INFO L933 BasicCegarLoop]: 1698 mSDtfsCounter, 4922 mSDsluCounter, 2327 mSDsCounter, 0 mSdLazyCounter, 6603 mSolverCounterSat, 1706 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16248.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5023 SdHoareTripleChecker+Valid, 4025 SdHoareTripleChecker+Invalid, 8313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 53.56ms SdHoareTripleChecker+Time, 1706 IncrementalHoareTripleChecker+Valid, 6603 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17451.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:11,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5023 Valid, 4025 Invalid, 8313 Unknown, 0 Unchecked, 53.56ms Time], IncrementalHoareTripleChecker [1706 Valid, 6603 Invalid, 4 Unknown, 0 Unchecked, 17451.01ms Time] [2021-11-12 23:42:11,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49745 states. [2021-11-12 23:42:14,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49745 to 43367. [2021-11-12 23:42:14,587 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) [2021-11-12 23:42:15,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43367 states to 43367 states and 70013 transitions. [2021-11-12 23:42:15,232 INFO L78 Accepts]: Start accepts. Automaton has 43367 states and 70013 transitions. Word has length 149 [2021-11-12 23:42:15,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:15,233 INFO L470 AbstractCegarLoop]: Abstraction has 43367 states and 70013 transitions. [2021-11-12 23:42:15,233 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) [2021-11-12 23:42:15,233 INFO L276 IsEmpty]: Start isEmpty. Operand 43367 states and 70013 transitions. [2021-11-12 23:42:15,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-12 23:42:15,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:15,242 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] [2021-11-12 23:42:15,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-12 23:42:15,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:15,464 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:15,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:15,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2008748306, now seen corresponding path program 1 times [2021-11-12 23:42:15,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:15,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178015446] [2021-11-12 23:42:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:15,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:15,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:15,468 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:15,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:42:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:16,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:42:16,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:42:16,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 23:42:17,246 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:17,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178015446] [2021-11-12 23:42:17,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178015446] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:17,246 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:42:17,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 23:42:17,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078453660] [2021-11-12 23:42:17,246 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:17,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:42:17,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:17,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:42:17,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:42:17,249 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) [2021-11-12 23:42:19,272 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:21,280 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:30,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:30,966 INFO L93 Difference]: Finished difference Result 89434 states and 146461 transitions. [2021-11-12 23:42:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:42:30,967 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 [2021-11-12 23:42:30,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:31,497 INFO L225 Difference]: With dead ends: 89434 [2021-11-12 23:42:31,498 INFO L226 Difference]: Without dead ends: 52050 [2021-11-12 23:42:31,716 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 [2021-11-12 23:42:31,717 INFO L933 BasicCegarLoop]: 1111 mSDtfsCounter, 4824 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 4419 mSolverCounterSat, 1203 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9179.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4912 SdHoareTripleChecker+Valid, 2641 SdHoareTripleChecker+Invalid, 5624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.55ms SdHoareTripleChecker+Time, 1203 IncrementalHoareTripleChecker+Valid, 4419 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9924.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:31,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4912 Valid, 2641 Invalid, 5624 Unknown, 0 Unchecked, 29.55ms Time], IncrementalHoareTripleChecker [1203 Valid, 4419 Invalid, 2 Unknown, 0 Unchecked, 9924.59ms Time] [2021-11-12 23:42:31,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52050 states. [2021-11-12 23:42:34,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52050 to 46688. [2021-11-12 23:42:34,853 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) [2021-11-12 23:42:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46688 states to 46688 states and 75179 transitions. [2021-11-12 23:42:35,522 INFO L78 Accepts]: Start accepts. Automaton has 46688 states and 75179 transitions. Word has length 149 [2021-11-12 23:42:35,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:35,523 INFO L470 AbstractCegarLoop]: Abstraction has 46688 states and 75179 transitions. [2021-11-12 23:42:35,523 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) [2021-11-12 23:42:35,523 INFO L276 IsEmpty]: Start isEmpty. Operand 46688 states and 75179 transitions. [2021-11-12 23:42:35,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 23:42:35,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:35,531 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] [2021-11-12 23:42:35,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:35,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:35,753 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:35,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:35,754 INFO L85 PathProgramCache]: Analyzing trace with hash -884158546, now seen corresponding path program 1 times [2021-11-12 23:42:35,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:35,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460220573] [2021-11-12 23:42:35,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:35,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:35,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:35,755 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:35,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:42:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:36,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:42:36,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 23:42:36,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:42:37,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:37,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460220573] [2021-11-12 23:42:37,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460220573] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:42:37,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:42:37,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 18 [2021-11-12 23:42:37,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901190984] [2021-11-12 23:42:37,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:37,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:42:37,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:42:37,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:42:37,539 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) [2021-11-12 23:42:39,558 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:41,566 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:43,573 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:45,582 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:47,588 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:49,595 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:51,602 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:01,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:01,564 INFO L93 Difference]: Finished difference Result 88441 states and 144268 transitions. [2021-11-12 23:43:01,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:43:01,565 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 [2021-11-12 23:43:01,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:01,877 INFO L225 Difference]: With dead ends: 88441 [2021-11-12 23:43:01,877 INFO L226 Difference]: Without dead ends: 47736 [2021-11-12 23:43:02,095 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 [2021-11-12 23:43:02,096 INFO L933 BasicCegarLoop]: 1433 mSDtfsCounter, 2700 mSDsluCounter, 3136 mSDsCounter, 0 mSdLazyCounter, 7084 mSolverCounterSat, 704 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19995.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2811 SdHoareTripleChecker+Valid, 4569 SdHoareTripleChecker+Invalid, 7795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.92ms SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 7084 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20881.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:02,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2811 Valid, 4569 Invalid, 7795 Unknown, 0 Unchecked, 32.92ms Time], IncrementalHoareTripleChecker [704 Valid, 7084 Invalid, 7 Unknown, 0 Unchecked, 20881.89ms Time] [2021-11-12 23:43:02,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47736 states. [2021-11-12 23:43:04,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47736 to 46613. [2021-11-12 23:43:04,604 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) [2021-11-12 23:43:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46613 states to 46613 states and 75038 transitions. [2021-11-12 23:43:05,107 INFO L78 Accepts]: Start accepts. Automaton has 46613 states and 75038 transitions. Word has length 151 [2021-11-12 23:43:05,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:05,108 INFO L470 AbstractCegarLoop]: Abstraction has 46613 states and 75038 transitions. [2021-11-12 23:43:05,108 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) [2021-11-12 23:43:05,108 INFO L276 IsEmpty]: Start isEmpty. Operand 46613 states and 75038 transitions. [2021-11-12 23:43:05,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-12 23:43:05,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:05,114 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] [2021-11-12 23:43:05,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:05,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:43:05,328 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:05,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:05,329 INFO L85 PathProgramCache]: Analyzing trace with hash 101561086, now seen corresponding path program 1 times [2021-11-12 23:43:05,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:05,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548508564] [2021-11-12 23:43:05,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:05,329 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:05,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:05,330 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:05,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:43:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:05,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:43:05,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:43:06,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 23:43:07,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:07,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548508564] [2021-11-12 23:43:07,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548508564] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:07,070 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:07,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-12 23:43:07,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060927278] [2021-11-12 23:43:07,070 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:07,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:43:07,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:07,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:43:07,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:43:07,071 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) [2021-11-12 23:43:09,091 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:11,101 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:13,108 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:15,113 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:30,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:30,512 INFO L93 Difference]: Finished difference Result 130948 states and 217619 transitions. [2021-11-12 23:43:30,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 23:43:30,512 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 [2021-11-12 23:43:30,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:31,428 INFO L225 Difference]: With dead ends: 130948 [2021-11-12 23:43:31,428 INFO L226 Difference]: Without dead ends: 89808 [2021-11-12 23:43:31,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:43:31,709 INFO L933 BasicCegarLoop]: 1050 mSDtfsCounter, 4806 mSDsluCounter, 2451 mSDsCounter, 0 mSdLazyCounter, 7108 mSolverCounterSat, 1372 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16168.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4901 SdHoareTripleChecker+Valid, 3501 SdHoareTripleChecker+Invalid, 8484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.05ms SdHoareTripleChecker+Time, 1372 IncrementalHoareTripleChecker+Valid, 7108 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17318.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:31,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4901 Valid, 3501 Invalid, 8484 Unknown, 0 Unchecked, 48.05ms Time], IncrementalHoareTripleChecker [1372 Valid, 7108 Invalid, 4 Unknown, 0 Unchecked, 17318.23ms Time] [2021-11-12 23:43:31,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89808 states. [2021-11-12 23:43:36,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89808 to 81614. [2021-11-12 23:43:36,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81614 states, 59699 states have (on average 1.4746813179450242) internal successors, (88037), 62065 states have internal predecessors, (88037), 16111 states have call successors, (16111), 4104 states have call predecessors, (16111), 5803 states have return successors, (26997), 16884 states have call predecessors, (26997), 15988 states have call successors, (26997) [2021-11-12 23:43:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81614 states to 81614 states and 131145 transitions. [2021-11-12 23:43:37,697 INFO L78 Accepts]: Start accepts. Automaton has 81614 states and 131145 transitions. Word has length 154 [2021-11-12 23:43:37,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:37,698 INFO L470 AbstractCegarLoop]: Abstraction has 81614 states and 131145 transitions. [2021-11-12 23:43:37,698 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), 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) [2021-11-12 23:43:37,698 INFO L276 IsEmpty]: Start isEmpty. Operand 81614 states and 131145 transitions. [2021-11-12 23:43:37,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-12 23:43:37,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:37,704 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:37,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:37,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:43:37,920 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:37,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:37,921 INFO L85 PathProgramCache]: Analyzing trace with hash 367413937, now seen corresponding path program 1 times [2021-11-12 23:43:37,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:37,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813330846] [2021-11-12 23:43:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:37,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:37,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:37,922 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:37,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297f5fd4-19c0-4378-b0d0-989d9c56550b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:43:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:38,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:43:38,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:43:38,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 23:43:39,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:39,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813330846] [2021-11-12 23:43:39,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813330846] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:39,414 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:39,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:43:39,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20837856] [2021-11-12 23:43:39,415 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:39,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:43:39,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:39,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:43:39,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:43:39,416 INFO L87 Difference]: Start difference. First operand 81614 states and 131145 transitions. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 6 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24)