./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.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_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/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_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/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_d6dea145-e81c-4046-b6a0-1e235eb7df67/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 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:33:54,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:33:54,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:33:54,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:33:54,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:33:54,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:33:54,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:33:54,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:33:54,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:33:54,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:33:54,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:33:54,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:33:54,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:33:54,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:33:54,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:33:54,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:33:54,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:33:54,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:33:54,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:33:54,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:33:54,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:33:54,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:33:54,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:33:54,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:33:54,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:33:54,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:33:54,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:33:54,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:33:54,160 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:33:54,161 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:33:54,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:33:54,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:33:54,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:33:54,166 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:33:54,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:33:54,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:33:54,169 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:33:54,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:33:54,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:33:54,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:33:54,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:33:54,172 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:33:54,227 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:33:54,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:33:54,229 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:33:54,230 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:33:54,230 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:33:54,230 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:33:54,230 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:33:54,231 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:33:54,239 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:33:54,239 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:33:54,241 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:33:54,241 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:33:54,241 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:33:54,242 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:33:54,242 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:33:54,242 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:33:54,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:33:54,243 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:33:54,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:33:54,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:33:54,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:33:54,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:33:54,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:33:54,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:33:54,245 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:33:54,245 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:33:54,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:33:54,246 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:33:54,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:33:54,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:33:54,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:33:54,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:33:54,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:33:54,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:33:54,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:33:54,250 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:33:54,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:33:54,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:33:54,251 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:33:54,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:33:54,252 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_d6dea145-e81c-4046-b6a0-1e235eb7df67/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd [2021-11-13 02:33:54,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:33:54,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:33:54,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:33:54,615 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:33:54,616 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:33:54,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2021-11-13 02:33:54,721 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/data/0bf51ca05/e8c607a784964f34a8e3ecb71d6e7584/FLAG30cf8fe73 [2021-11-13 02:33:55,461 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:33:55,462 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2021-11-13 02:33:55,488 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/data/0bf51ca05/e8c607a784964f34a8e3ecb71d6e7584/FLAG30cf8fe73 [2021-11-13 02:33:55,626 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/data/0bf51ca05/e8c607a784964f34a8e3ecb71d6e7584 [2021-11-13 02:33:55,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:33:55,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:33:55,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:33:55,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:33:55,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:33:55,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:33:55" (1/1) ... [2021-11-13 02:33:55,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@387656c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:55, skipping insertion in model container [2021-11-13 02:33:55,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:33:55" (1/1) ... [2021-11-13 02:33:55,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:33:55,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:33:56,621 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_d6dea145-e81c-4046-b6a0-1e235eb7df67/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2021-11-13 02:33:56,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:33:56,648 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) [2021-11-13 02:33:56,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@669194a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:56, skipping insertion in model container [2021-11-13 02:33:56,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:33:56,650 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:33:56,652 INFO L158 Benchmark]: Toolchain (without parser) took 1020.06ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 68.0MB in the beginning and 90.1MB in the end (delta: -22.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 02:33:56,653 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 104.9MB. Free memory is still 60.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:33:56,655 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1015.59ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 67.7MB in the beginning and 90.1MB in the end (delta: -22.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 02:33:56,657 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 104.9MB. Free memory is still 60.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1015.59ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 67.7MB in the beginning and 90.1MB in the end (delta: -22.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2070]: 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_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/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_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/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_d6dea145-e81c-4046-b6a0-1e235eb7df67/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 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:33:59,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:33:59,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:33:59,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:33:59,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:33:59,217 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:33:59,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:33:59,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:33:59,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:33:59,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:33:59,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:33:59,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:33:59,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:33:59,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:33:59,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:33:59,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:33:59,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:33:59,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:33:59,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:33:59,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:33:59,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:33:59,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:33:59,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:33:59,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:33:59,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:33:59,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:33:59,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:33:59,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:33:59,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:33:59,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:33:59,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:33:59,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:33:59,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:33:59,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:33:59,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:33:59,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:33:59,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:33:59,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:33:59,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:33:59,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:33:59,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:33:59,272 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 02:33:59,302 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:33:59,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:33:59,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:33:59,305 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:33:59,305 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:33:59,305 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:33:59,305 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:33:59,306 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:33:59,306 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:33:59,306 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:33:59,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:33:59,307 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:33:59,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:33:59,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:33:59,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:33:59,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:33:59,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:33:59,309 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:33:59,309 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:33:59,309 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:33:59,309 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:33:59,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:33:59,310 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:33:59,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:33:59,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:33:59,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:33:59,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:33:59,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:33:59,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:33:59,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:33:59,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:33:59,312 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:33:59,312 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:33:59,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:33:59,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:33:59,313 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:33:59,313 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_d6dea145-e81c-4046-b6a0-1e235eb7df67/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd [2021-11-13 02:33:59,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:33:59,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:33:59,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:33:59,894 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:33:59,895 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:33:59,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2021-11-13 02:33:59,987 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/data/511676827/b0e920d04f2748eca9ef5091a9e4c865/FLAG41f15a8ac [2021-11-13 02:34:00,859 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:34:00,859 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2021-11-13 02:34:00,893 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/data/511676827/b0e920d04f2748eca9ef5091a9e4c865/FLAG41f15a8ac [2021-11-13 02:34:00,970 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/data/511676827/b0e920d04f2748eca9ef5091a9e4c865 [2021-11-13 02:34:00,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:34:00,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:34:00,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:34:00,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:34:00,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:34:00,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:34:00" (1/1) ... [2021-11-13 02:34:00,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68b4e114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:00, skipping insertion in model container [2021-11-13 02:34:00,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:34:00" (1/1) ... [2021-11-13 02:34:00,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:34:01,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:34:01,886 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_d6dea145-e81c-4046-b6a0-1e235eb7df67/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2021-11-13 02:34:01,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:34:01,928 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:34:01,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:34:02,101 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_d6dea145-e81c-4046-b6a0-1e235eb7df67/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2021-11-13 02:34:02,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:34:02,114 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:34:02,220 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_d6dea145-e81c-4046-b6a0-1e235eb7df67/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2021-11-13 02:34:02,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:34:02,282 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:34:02,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:02 WrapperNode [2021-11-13 02:34:02,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:34:02,285 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:34:02,285 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:34:02,286 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:34:02,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:02" (1/1) ... [2021-11-13 02:34:02,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:02" (1/1) ... [2021-11-13 02:34:02,425 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:34:02,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:34:02,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:34:02,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:34:02,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:02" (1/1) ... [2021-11-13 02:34:02,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:02" (1/1) ... [2021-11-13 02:34:02,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:02" (1/1) ... [2021-11-13 02:34:02,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:02" (1/1) ... [2021-11-13 02:34:02,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:02" (1/1) ... [2021-11-13 02:34:02,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:02" (1/1) ... [2021-11-13 02:34:02,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:02" (1/1) ... [2021-11-13 02:34:02,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:34:02,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:34:02,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:34:02,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:34:02,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:02" (1/1) ... [2021-11-13 02:34:02,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:34:02,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:02,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:34:02,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:34:02,662 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-13 02:34:02,662 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-13 02:34:02,662 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-13 02:34:02,663 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-13 02:34:02,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:34:02,663 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-13 02:34:02,663 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-13 02:34:02,663 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-13 02:34:02,663 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-13 02:34:02,664 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-13 02:34:02,664 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-13 02:34:02,664 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-13 02:34:02,664 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-13 02:34:02,665 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-13 02:34:02,665 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-13 02:34:02,665 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-13 02:34:02,665 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-13 02:34:02,665 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-13 02:34:02,665 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-13 02:34:02,666 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-13 02:34:02,666 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-13 02:34:02,666 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-13 02:34:02,666 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-13 02:34:02,666 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-13 02:34:02,666 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-13 02:34:02,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:34:02,667 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-13 02:34:02,667 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-13 02:34:02,667 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-13 02:34:02,667 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-13 02:34:02,667 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-13 02:34:02,668 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-13 02:34:02,669 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-13 02:34:02,669 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-13 02:34:02,669 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2021-11-13 02:34:02,670 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2021-11-13 02:34:02,670 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-13 02:34:02,670 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-13 02:34:02,670 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-13 02:34:02,670 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-13 02:34:02,670 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-13 02:34:02,671 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-13 02:34:02,671 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-13 02:34:02,671 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-13 02:34:02,671 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-13 02:34:02,672 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-13 02:34:02,672 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-13 02:34:02,672 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-13 02:34:02,673 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-13 02:34:02,673 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-13 02:34:02,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:34:02,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:34:02,676 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-13 02:34:02,676 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-13 02:34:07,186 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:34:07,189 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 02:34:07,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:34:07 BoogieIcfgContainer [2021-11-13 02:34:07,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:34:07,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:34:07,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:34:07,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:34:07,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:34:00" (1/3) ... [2021-11-13 02:34:07,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e77b6e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:34:07, skipping insertion in model container [2021-11-13 02:34:07,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:02" (2/3) ... [2021-11-13 02:34:07,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e77b6e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:34:07, skipping insertion in model container [2021-11-13 02:34:07,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:34:07" (3/3) ... [2021-11-13 02:34:07,209 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product26.cil.c [2021-11-13 02:34:07,215 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:34:07,216 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:34:07,297 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:34:07,308 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 [2021-11-13 02:34:07,308 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:34:07,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 578 states, 449 states have (on average 1.6859688195991092) internal successors, (757), 469 states have internal predecessors, (757), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-13 02:34:07,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 02:34:07,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:07,394 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] [2021-11-13 02:34:07,395 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:07,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:07,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1615056188, now seen corresponding path program 1 times [2021-11-13 02:34:07,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:07,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062238104] [2021-11-13 02:34:07,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:07,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:07,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:07,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:07,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:34:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:08,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:34:08,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:08,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:09,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:09,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062238104] [2021-11-13 02:34:09,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062238104] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:09,056 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:09,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 02:34:09,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246378488] [2021-11-13 02:34:09,060 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:09,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:34:09,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:09,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:34:09,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:34:09,107 INFO L87 Difference]: Start difference. First operand has 578 states, 449 states have (on average 1.6859688195991092) internal successors, (757), 469 states have internal predecessors, (757), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 11 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 02:34:09,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:09,572 INFO L93 Difference]: Finished difference Result 1159 states and 1943 transitions. [2021-11-13 02:34:09,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:34:09,579 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 63 [2021-11-13 02:34:09,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:09,610 INFO L225 Difference]: With dead ends: 1159 [2021-11-13 02:34:09,611 INFO L226 Difference]: Without dead ends: 589 [2021-11-13 02:34:09,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:34:09,631 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 214 mSDsluCounter, 4689 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 173.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 5631 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 44.00ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 213.78ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:09,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 5631 Invalid, 101 Unknown, 0 Unchecked, 44.00ms Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 213.78ms Time] [2021-11-13 02:34:09,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-13 02:34:09,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 581. [2021-11-13 02:34:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 452 states have (on average 1.676991150442478) internal successors, (758), 472 states have internal predecessors, (758), 103 states have call successors, (103), 25 states have call predecessors, (103), 25 states have return successors, (102), 97 states have call predecessors, (102), 100 states have call successors, (102) [2021-11-13 02:34:09,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 963 transitions. [2021-11-13 02:34:09,787 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 963 transitions. Word has length 63 [2021-11-13 02:34:09,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:09,793 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 963 transitions. [2021-11-13 02:34:09,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 02:34:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 963 transitions. [2021-11-13 02:34:09,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 02:34:09,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:09,807 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] [2021-11-13 02:34:09,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:10,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:10,032 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:10,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:10,033 INFO L85 PathProgramCache]: Analyzing trace with hash -102377112, now seen corresponding path program 1 times [2021-11-13 02:34:10,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:10,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574762551] [2021-11-13 02:34:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:10,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:10,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:10,036 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:10,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:34:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:10,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:34:10,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:10,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:11,359 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:11,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574762551] [2021-11-13 02:34:11,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574762551] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:11,360 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:11,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 02:34:11,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732306000] [2021-11-13 02:34:11,367 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:11,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:34:11,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:11,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:34:11,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:34:11,372 INFO L87 Difference]: Start difference. First operand 581 states and 963 transitions. Second operand has 11 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 02:34:11,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:11,775 INFO L93 Difference]: Finished difference Result 1167 states and 1944 transitions. [2021-11-13 02:34:11,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:34:11,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 64 [2021-11-13 02:34:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:11,786 INFO L225 Difference]: With dead ends: 1167 [2021-11-13 02:34:11,786 INFO L226 Difference]: Without dead ends: 602 [2021-11-13 02:34:11,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:34:11,792 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 175 mSDsluCounter, 6487 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 214.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 7431 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.09ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 241.17ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:11,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 7431 Invalid, 127 Unknown, 0 Unchecked, 25.09ms Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 241.17ms Time] [2021-11-13 02:34:11,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-11-13 02:34:11,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 594. [2021-11-13 02:34:11,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 462 states have (on average 1.673160173160173) internal successors, (773), 484 states have internal predecessors, (773), 104 states have call successors, (104), 25 states have call predecessors, (104), 27 states have return successors, (105), 98 states have call predecessors, (105), 101 states have call successors, (105) [2021-11-13 02:34:11,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 982 transitions. [2021-11-13 02:34:11,846 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 982 transitions. Word has length 64 [2021-11-13 02:34:11,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:11,846 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 982 transitions. [2021-11-13 02:34:11,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 02:34:11,847 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 982 transitions. [2021-11-13 02:34:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 02:34:11,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:11,851 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] [2021-11-13 02:34:11,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:12,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:12,074 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:12,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:12,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1467300504, now seen corresponding path program 1 times [2021-11-13 02:34:12,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:12,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404481635] [2021-11-13 02:34:12,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:12,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:12,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:12,078 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:12,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:34:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:12,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:34:12,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:12,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:13,321 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:13,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404481635] [2021-11-13 02:34:13,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404481635] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:13,322 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:13,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 02:34:13,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422075809] [2021-11-13 02:34:13,323 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:13,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:34:13,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:13,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:34:13,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:34:13,325 INFO L87 Difference]: Start difference. First operand 594 states and 982 transitions. Second operand has 11 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 02:34:13,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:13,641 INFO L93 Difference]: Finished difference Result 1193 states and 1983 transitions. [2021-11-13 02:34:13,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:34:13,643 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 65 [2021-11-13 02:34:13,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:13,655 INFO L225 Difference]: With dead ends: 1193 [2021-11-13 02:34:13,655 INFO L226 Difference]: Without dead ends: 615 [2021-11-13 02:34:13,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:34:13,666 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 185 mSDsluCounter, 4680 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 186.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 5624 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.49ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 210.69ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:13,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 5624 Invalid, 111 Unknown, 0 Unchecked, 23.49ms Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 210.69ms Time] [2021-11-13 02:34:13,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-11-13 02:34:13,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 607. [2021-11-13 02:34:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 472 states have (on average 1.6694915254237288) internal successors, (788), 496 states have internal predecessors, (788), 105 states have call successors, (105), 25 states have call predecessors, (105), 29 states have return successors, (108), 99 states have call predecessors, (108), 102 states have call successors, (108) [2021-11-13 02:34:13,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1001 transitions. [2021-11-13 02:34:13,720 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1001 transitions. Word has length 65 [2021-11-13 02:34:13,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:13,722 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 1001 transitions. [2021-11-13 02:34:13,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 02:34:13,723 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1001 transitions. [2021-11-13 02:34:13,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 02:34:13,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:13,727 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] [2021-11-13 02:34:13,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:13,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:13,951 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:13,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:13,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1843587188, now seen corresponding path program 1 times [2021-11-13 02:34:13,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:13,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883737469] [2021-11-13 02:34:13,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:13,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:13,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:13,954 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:13,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:34:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:14,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:34:14,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:14,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:15,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:15,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883737469] [2021-11-13 02:34:15,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [883737469] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:15,251 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:15,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 02:34:15,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540175018] [2021-11-13 02:34:15,252 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:15,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:34:15,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:15,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:34:15,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:34:15,253 INFO L87 Difference]: Start difference. First operand 607 states and 1001 transitions. Second operand has 11 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 02:34:15,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:15,539 INFO L93 Difference]: Finished difference Result 1215 states and 2016 transitions. [2021-11-13 02:34:15,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:34:15,541 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 66 [2021-11-13 02:34:15,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:15,548 INFO L225 Difference]: With dead ends: 1215 [2021-11-13 02:34:15,549 INFO L226 Difference]: Without dead ends: 624 [2021-11-13 02:34:15,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:34:15,555 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 102 mSDsluCounter, 6402 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 177.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 7346 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.17ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 201.27ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:15,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 7346 Invalid, 118 Unknown, 0 Unchecked, 16.17ms Time], IncrementalHoareTripleChecker [5 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 201.27ms Time] [2021-11-13 02:34:15,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-11-13 02:34:15,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 620. [2021-11-13 02:34:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 482 states have (on average 1.66597510373444) internal successors, (803), 508 states have internal predecessors, (803), 106 states have call successors, (106), 25 states have call predecessors, (106), 31 states have return successors, (111), 100 states have call predecessors, (111), 103 states have call successors, (111) [2021-11-13 02:34:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1020 transitions. [2021-11-13 02:34:15,596 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1020 transitions. Word has length 66 [2021-11-13 02:34:15,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:15,596 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 1020 transitions. [2021-11-13 02:34:15,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 02:34:15,597 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1020 transitions. [2021-11-13 02:34:15,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 02:34:15,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:15,600 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] [2021-11-13 02:34:15,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:15,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:15,823 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:15,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:15,824 INFO L85 PathProgramCache]: Analyzing trace with hash 789040973, now seen corresponding path program 1 times [2021-11-13 02:34:15,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:15,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501775925] [2021-11-13 02:34:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:15,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:15,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:15,826 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:15,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:34:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:16,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:34:16,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:16,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:17,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:17,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501775925] [2021-11-13 02:34:17,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501775925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:17,058 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:17,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-13 02:34:17,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068147043] [2021-11-13 02:34:17,059 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:17,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:34:17,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:17,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:34:17,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:34:17,061 INFO L87 Difference]: Start difference. First operand 620 states and 1020 transitions. Second operand has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 02:34:17,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:17,250 INFO L93 Difference]: Finished difference Result 1235 states and 2046 transitions. [2021-11-13 02:34:17,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:34:17,251 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2021-11-13 02:34:17,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:17,257 INFO L225 Difference]: With dead ends: 1235 [2021-11-13 02:34:17,258 INFO L226 Difference]: Without dead ends: 631 [2021-11-13 02:34:17,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:34:17,263 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 181 mSDsluCounter, 4528 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 5460 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.96ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.28ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:17,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 5460 Invalid, 81 Unknown, 0 Unchecked, 10.96ms Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 122.28ms Time] [2021-11-13 02:34:17,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-13 02:34:17,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2021-11-13 02:34:17,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 490 states have (on average 1.6653061224489796) internal successors, (816), 517 states have internal predecessors, (816), 106 states have call successors, (106), 25 states have call predecessors, (106), 32 states have return successors, (115), 100 states have call predecessors, (115), 103 states have call successors, (115) [2021-11-13 02:34:17,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1037 transitions. [2021-11-13 02:34:17,296 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1037 transitions. Word has length 66 [2021-11-13 02:34:17,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:17,297 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1037 transitions. [2021-11-13 02:34:17,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 02:34:17,297 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1037 transitions. [2021-11-13 02:34:17,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 02:34:17,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:17,300 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] [2021-11-13 02:34:17,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:17,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:17,518 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:17,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:17,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1636906996, now seen corresponding path program 1 times [2021-11-13 02:34:17,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:17,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263294050] [2021-11-13 02:34:17,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:17,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:17,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:17,521 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:17,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:34:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:18,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:34:18,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:18,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:18,861 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:18,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263294050] [2021-11-13 02:34:18,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263294050] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:18,861 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:18,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:34:18,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334020382] [2021-11-13 02:34:18,862 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:18,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:34:18,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:18,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:34:18,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:34:18,863 INFO L87 Difference]: Start difference. First operand 629 states and 1037 transitions. Second operand has 13 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 02:34:19,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:19,330 INFO L93 Difference]: Finished difference Result 1257 states and 2080 transitions. [2021-11-13 02:34:19,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 02:34:19,332 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 67 [2021-11-13 02:34:19,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:19,339 INFO L225 Difference]: With dead ends: 1257 [2021-11-13 02:34:19,340 INFO L226 Difference]: Without dead ends: 635 [2021-11-13 02:34:19,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:34:19,346 INFO L933 BasicCegarLoop]: 922 mSDtfsCounter, 204 mSDsluCounter, 7286 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 286.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 8208 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.18ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 320.99ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:19,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 8208 Invalid, 209 Unknown, 0 Unchecked, 20.18ms Time], IncrementalHoareTripleChecker [7 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 320.99ms Time] [2021-11-13 02:34:19,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-13 02:34:19,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 625. [2021-11-13 02:34:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 486 states have (on average 1.654320987654321) internal successors, (804), 513 states have internal predecessors, (804), 106 states have call successors, (106), 25 states have call predecessors, (106), 32 states have return successors, (115), 100 states have call predecessors, (115), 103 states have call successors, (115) [2021-11-13 02:34:19,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1025 transitions. [2021-11-13 02:34:19,390 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1025 transitions. Word has length 67 [2021-11-13 02:34:19,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:19,391 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1025 transitions. [2021-11-13 02:34:19,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 02:34:19,391 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1025 transitions. [2021-11-13 02:34:19,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 02:34:19,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:19,394 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] [2021-11-13 02:34:19,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:19,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:19,616 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:19,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:19,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1570369604, now seen corresponding path program 1 times [2021-11-13 02:34:19,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:19,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761072310] [2021-11-13 02:34:19,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:19,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:19,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:19,620 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:19,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:34:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:20,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:34:20,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:20,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:20,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:20,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761072310] [2021-11-13 02:34:20,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761072310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:20,636 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:20,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 02:34:20,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314511089] [2021-11-13 02:34:20,637 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:20,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:34:20,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:20,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:34:20,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:34:20,638 INFO L87 Difference]: Start difference. First operand 625 states and 1025 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 02:34:20,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:20,735 INFO L93 Difference]: Finished difference Result 1226 states and 2015 transitions. [2021-11-13 02:34:20,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:34:20,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 67 [2021-11-13 02:34:20,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:20,747 INFO L225 Difference]: With dead ends: 1226 [2021-11-13 02:34:20,747 INFO L226 Difference]: Without dead ends: 539 [2021-11-13 02:34:20,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:34:20,756 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 19 mSDsluCounter, 2785 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3717 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.60ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.42ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:20,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 3717 Invalid, 21 Unknown, 0 Unchecked, 8.60ms Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 36.42ms Time] [2021-11-13 02:34:20,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-11-13 02:34:20,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2021-11-13 02:34:20,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 413 states have (on average 1.6416464891041163) internal successors, (678), 431 states have internal predecessors, (678), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-13 02:34:20,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 879 transitions. [2021-11-13 02:34:20,791 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 879 transitions. Word has length 67 [2021-11-13 02:34:20,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:20,791 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 879 transitions. [2021-11-13 02:34:20,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 02:34:20,792 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 879 transitions. [2021-11-13 02:34:20,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 02:34:20,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:20,793 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] [2021-11-13 02:34:20,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:21,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:21,008 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:21,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:21,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1677680748, now seen corresponding path program 1 times [2021-11-13 02:34:21,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:21,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781034321] [2021-11-13 02:34:21,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:21,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:21,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:21,010 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:21,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:34:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:21,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:34:21,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:21,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:22,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:22,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781034321] [2021-11-13 02:34:22,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781034321] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:22,211 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:22,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:34:22,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975349536] [2021-11-13 02:34:22,212 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:22,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:34:22,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:22,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:34:22,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:34:22,215 INFO L87 Difference]: Start difference. First operand 539 states and 879 transitions. Second operand has 13 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 02:34:22,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:22,478 INFO L93 Difference]: Finished difference Result 1065 states and 1746 transitions. [2021-11-13 02:34:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:34:22,480 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2021-11-13 02:34:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:22,487 INFO L225 Difference]: With dead ends: 1065 [2021-11-13 02:34:22,487 INFO L226 Difference]: Without dead ends: 539 [2021-11-13 02:34:22,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:34:22,493 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 50 mSDsluCounter, 6853 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 141.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 7715 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.02ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 159.11ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:22,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 7715 Invalid, 124 Unknown, 0 Unchecked, 17.02ms Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 159.11ms Time] [2021-11-13 02:34:22,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-11-13 02:34:22,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2021-11-13 02:34:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 413 states have (on average 1.639225181598063) internal successors, (677), 431 states have internal predecessors, (677), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-13 02:34:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 878 transitions. [2021-11-13 02:34:22,524 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 878 transitions. Word has length 68 [2021-11-13 02:34:22,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:22,525 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 878 transitions. [2021-11-13 02:34:22,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 02:34:22,526 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 878 transitions. [2021-11-13 02:34:22,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 02:34:22,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:22,528 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] [2021-11-13 02:34:22,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:22,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:22,744 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:22,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1388155601, now seen corresponding path program 1 times [2021-11-13 02:34:22,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:22,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572983805] [2021-11-13 02:34:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:22,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:22,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:22,747 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:22,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 02:34:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:23,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:34:23,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:23,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:24,085 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:24,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572983805] [2021-11-13 02:34:24,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572983805] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:24,085 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:24,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:34:24,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732571739] [2021-11-13 02:34:24,086 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:24,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:34:24,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:24,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:34:24,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:34:24,090 INFO L87 Difference]: Start difference. First operand 539 states and 878 transitions. Second operand has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 02:34:24,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:24,366 INFO L93 Difference]: Finished difference Result 1065 states and 1744 transitions. [2021-11-13 02:34:24,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:34:24,368 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-11-13 02:34:24,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:24,382 INFO L225 Difference]: With dead ends: 1065 [2021-11-13 02:34:24,382 INFO L226 Difference]: Without dead ends: 539 [2021-11-13 02:34:24,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:34:24,390 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 59 mSDsluCounter, 6878 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 143.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 7740 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.22ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 162.29ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:24,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 7740 Invalid, 129 Unknown, 0 Unchecked, 14.22ms Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 162.29ms Time] [2021-11-13 02:34:24,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-11-13 02:34:24,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2021-11-13 02:34:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 413 states have (on average 1.6368038740920097) internal successors, (676), 431 states have internal predecessors, (676), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-13 02:34:24,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 877 transitions. [2021-11-13 02:34:24,420 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 877 transitions. Word has length 69 [2021-11-13 02:34:24,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:24,420 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 877 transitions. [2021-11-13 02:34:24,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 02:34:24,421 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 877 transitions. [2021-11-13 02:34:24,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 02:34:24,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:24,424 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] [2021-11-13 02:34:24,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:24,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:24,641 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:24,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:24,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1040280529, now seen corresponding path program 1 times [2021-11-13 02:34:24,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:24,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668738824] [2021-11-13 02:34:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:24,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:24,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:24,643 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:24,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:34:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:25,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:34:25,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:25,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:25,825 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:25,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668738824] [2021-11-13 02:34:25,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668738824] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:25,825 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:25,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:34:25,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231179042] [2021-11-13 02:34:25,826 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:25,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:34:25,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:25,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:34:25,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:34:25,828 INFO L87 Difference]: Start difference. First operand 539 states and 877 transitions. Second operand has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 02:34:26,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:26,120 INFO L93 Difference]: Finished difference Result 1065 states and 1742 transitions. [2021-11-13 02:34:26,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:34:26,122 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2021-11-13 02:34:26,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:26,129 INFO L225 Difference]: With dead ends: 1065 [2021-11-13 02:34:26,129 INFO L226 Difference]: Without dead ends: 539 [2021-11-13 02:34:26,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:34:26,135 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 32 mSDsluCounter, 8572 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 165.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 9434 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.06ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 188.64ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:26,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 9434 Invalid, 134 Unknown, 0 Unchecked, 13.06ms Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 188.64ms Time] [2021-11-13 02:34:26,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-11-13 02:34:26,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2021-11-13 02:34:26,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 413 states have (on average 1.6343825665859564) internal successors, (675), 431 states have internal predecessors, (675), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-13 02:34:26,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 876 transitions. [2021-11-13 02:34:26,167 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 876 transitions. Word has length 70 [2021-11-13 02:34:26,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:26,168 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 876 transitions. [2021-11-13 02:34:26,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 02:34:26,168 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 876 transitions. [2021-11-13 02:34:26,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-13 02:34:26,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:26,170 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] [2021-11-13 02:34:26,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:26,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:26,384 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:26,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:26,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1116442218, now seen corresponding path program 1 times [2021-11-13 02:34:26,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:26,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596382577] [2021-11-13 02:34:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:26,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:26,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:26,386 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:26,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 02:34:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:26,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:34:26,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:27,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:34:27,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:27,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596382577] [2021-11-13 02:34:27,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596382577] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:27,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:34:27,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-13 02:34:27,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314456046] [2021-11-13 02:34:27,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:27,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:34:27,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:27,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:34:27,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:34:27,415 INFO L87 Difference]: Start difference. First operand 539 states and 876 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-13 02:34:29,438 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 [] [2021-11-13 02:34:31,445 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 [] [2021-11-13 02:34:32,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:32,485 INFO L93 Difference]: Finished difference Result 1584 states and 2620 transitions. [2021-11-13 02:34:32,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:34:32,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 71 [2021-11-13 02:34:32,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:32,506 INFO L225 Difference]: With dead ends: 1584 [2021-11-13 02:34:32,507 INFO L226 Difference]: Without dead ends: 1063 [2021-11-13 02:34:32,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:34:32,513 INFO L933 BasicCegarLoop]: 985 mSDtfsCounter, 840 mSDsluCounter, 3619 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 31 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4778.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 4604 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.75ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4909.90ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:32,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 4604 Invalid, 280 Unknown, 0 Unchecked, 29.75ms Time], IncrementalHoareTripleChecker [31 Valid, 247 Invalid, 2 Unknown, 0 Unchecked, 4909.90ms Time] [2021-11-13 02:34:32,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-11-13 02:34:32,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1050. [2021-11-13 02:34:32,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 810 states have (on average 1.6382716049382715) internal successors, (1327), 843 states have internal predecessors, (1327), 193 states have call successors, (193), 46 states have call predecessors, (193), 46 states have return successors, (205), 188 states have call predecessors, (205), 189 states have call successors, (205) [2021-11-13 02:34:32,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1725 transitions. [2021-11-13 02:34:32,617 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1725 transitions. Word has length 71 [2021-11-13 02:34:32,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:32,618 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 1725 transitions. [2021-11-13 02:34:32,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-13 02:34:32,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1725 transitions. [2021-11-13 02:34:32,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-13 02:34:32,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:32,619 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] [2021-11-13 02:34:32,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:32,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:32,820 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:32,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:32,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1785629846, now seen corresponding path program 1 times [2021-11-13 02:34:32,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:32,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576982383] [2021-11-13 02:34:32,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:32,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:32,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:32,823 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:32,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:34:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:33,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:34:33,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:33,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:33,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:33,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576982383] [2021-11-13 02:34:33,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576982383] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:33,860 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:33,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 02:34:33,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047894976] [2021-11-13 02:34:33,861 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:33,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:34:33,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:33,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:34:33,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:34:33,863 INFO L87 Difference]: Start difference. First operand 1050 states and 1725 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-13 02:34:35,887 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 [] [2021-11-13 02:34:38,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:38,190 INFO L93 Difference]: Finished difference Result 3620 states and 6043 transitions. [2021-11-13 02:34:38,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 02:34:38,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 71 [2021-11-13 02:34:38,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:38,225 INFO L225 Difference]: With dead ends: 3620 [2021-11-13 02:34:38,225 INFO L226 Difference]: Without dead ends: 2588 [2021-11-13 02:34:38,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:34:38,238 INFO L933 BasicCegarLoop]: 1096 mSDtfsCounter, 2334 mSDsluCounter, 3560 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 328 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3676.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2346 SdHoareTripleChecker+Valid, 4656 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.67ms SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3973.56ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:38,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2346 Valid, 4656 Invalid, 963 Unknown, 0 Unchecked, 27.67ms Time], IncrementalHoareTripleChecker [328 Valid, 634 Invalid, 1 Unknown, 0 Unchecked, 3973.56ms Time] [2021-11-13 02:34:38,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-11-13 02:34:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2490. [2021-11-13 02:34:38,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 1920 states have (on average 1.609375) internal successors, (3090), 2000 states have internal predecessors, (3090), 454 states have call successors, (454), 112 states have call predecessors, (454), 115 states have return successors, (508), 446 states have call predecessors, (508), 447 states have call successors, (508) [2021-11-13 02:34:38,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 4052 transitions. [2021-11-13 02:34:38,451 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 4052 transitions. Word has length 71 [2021-11-13 02:34:38,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:38,452 INFO L470 AbstractCegarLoop]: Abstraction has 2490 states and 4052 transitions. [2021-11-13 02:34:38,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-13 02:34:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 4052 transitions. [2021-11-13 02:34:38,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 02:34:38,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:38,455 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] [2021-11-13 02:34:38,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:38,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:38,678 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:38,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:38,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1710631331, now seen corresponding path program 1 times [2021-11-13 02:34:38,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:38,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979493197] [2021-11-13 02:34:38,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:38,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:38,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:38,682 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:38,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 02:34:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:39,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:34:39,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:39,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:39,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:39,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979493197] [2021-11-13 02:34:39,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979493197] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:39,821 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:39,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-13 02:34:39,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039051678] [2021-11-13 02:34:39,822 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:39,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:34:39,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:39,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:34:39,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:39,823 INFO L87 Difference]: Start difference. First operand 2490 states and 4052 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:34:41,860 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 [] [2021-11-13 02:34:43,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:43,603 INFO L93 Difference]: Finished difference Result 7860 states and 13421 transitions. [2021-11-13 02:34:43,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:34:43,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 74 [2021-11-13 02:34:43,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:43,682 INFO L225 Difference]: With dead ends: 7860 [2021-11-13 02:34:43,682 INFO L226 Difference]: Without dead ends: 5388 [2021-11-13 02:34:43,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:34:43,757 INFO L933 BasicCegarLoop]: 1115 mSDtfsCounter, 953 mSDsluCounter, 3876 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3231.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 4991 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.29ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3420.53ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:43,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [976 Valid, 4991 Invalid, 398 Unknown, 0 Unchecked, 17.29ms Time], IncrementalHoareTripleChecker [43 Valid, 354 Invalid, 1 Unknown, 0 Unchecked, 3420.53ms Time] [2021-11-13 02:34:43,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5388 states. [2021-11-13 02:34:44,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5388 to 4904. [2021-11-13 02:34:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4904 states, 3787 states have (on average 1.6047002904673884) internal successors, (6077), 3950 states have internal predecessors, (6077), 878 states have call successors, (878), 221 states have call predecessors, (878), 238 states have return successors, (1214), 870 states have call predecessors, (1214), 866 states have call successors, (1214) [2021-11-13 02:34:44,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4904 states to 4904 states and 8169 transitions. [2021-11-13 02:34:44,189 INFO L78 Accepts]: Start accepts. Automaton has 4904 states and 8169 transitions. Word has length 74 [2021-11-13 02:34:44,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:44,190 INFO L470 AbstractCegarLoop]: Abstraction has 4904 states and 8169 transitions. [2021-11-13 02:34:44,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:34:44,193 INFO L276 IsEmpty]: Start isEmpty. Operand 4904 states and 8169 transitions. [2021-11-13 02:34:44,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-13 02:34:44,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:44,195 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] [2021-11-13 02:34:44,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:44,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:44,408 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:44,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:44,408 INFO L85 PathProgramCache]: Analyzing trace with hash -41120062, now seen corresponding path program 1 times [2021-11-13 02:34:44,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:44,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278221345] [2021-11-13 02:34:44,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:44,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:44,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:44,411 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:44,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 02:34:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:45,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:34:45,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:45,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:45,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:45,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278221345] [2021-11-13 02:34:45,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278221345] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:45,436 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:45,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 02:34:45,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325235693] [2021-11-13 02:34:45,436 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:45,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:34:45,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:45,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:34:45,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:34:45,438 INFO L87 Difference]: Start difference. First operand 4904 states and 8169 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 02:34:45,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:45,871 INFO L93 Difference]: Finished difference Result 9820 states and 16560 transitions. [2021-11-13 02:34:45,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:34:45,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 75 [2021-11-13 02:34:45,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:45,931 INFO L225 Difference]: With dead ends: 9820 [2021-11-13 02:34:45,932 INFO L226 Difference]: Without dead ends: 4934 [2021-11-13 02:34:45,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:34:45,976 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 19 mSDsluCounter, 2527 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 145.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3383 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.53ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 172.24ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:45,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 3383 Invalid, 89 Unknown, 0 Unchecked, 6.53ms Time], IncrementalHoareTripleChecker [10 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 172.24ms Time] [2021-11-13 02:34:45,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4934 states. [2021-11-13 02:34:46,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4934 to 4924. [2021-11-13 02:34:46,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4924 states, 3802 states have (on average 1.6009994739610731) internal successors, (6087), 3965 states have internal predecessors, (6087), 878 states have call successors, (878), 231 states have call predecessors, (878), 243 states have return successors, (1187), 865 states have call predecessors, (1187), 866 states have call successors, (1187) [2021-11-13 02:34:46,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4924 states to 4924 states and 8152 transitions. [2021-11-13 02:34:46,564 INFO L78 Accepts]: Start accepts. Automaton has 4924 states and 8152 transitions. Word has length 75 [2021-11-13 02:34:46,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:46,565 INFO L470 AbstractCegarLoop]: Abstraction has 4924 states and 8152 transitions. [2021-11-13 02:34:46,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 02:34:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 4924 states and 8152 transitions. [2021-11-13 02:34:46,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-13 02:34:46,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:46,572 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 02:34:46,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:46,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:46,783 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:46,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:46,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1571611657, now seen corresponding path program 1 times [2021-11-13 02:34:46,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:46,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883469982] [2021-11-13 02:34:46,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:46,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:46,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:46,787 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:46,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 02:34:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:47,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:34:47,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:34:47,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:34:47,879 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:47,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883469982] [2021-11-13 02:34:47,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883469982] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:47,879 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:47,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-13 02:34:47,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609646474] [2021-11-13 02:34:47,880 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:47,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:34:47,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:47,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:34:47,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:47,882 INFO L87 Difference]: Start difference. First operand 4924 states and 8152 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-13 02:34:49,916 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 [] [2021-11-13 02:34:51,921 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 [] [2021-11-13 02:34:53,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:53,810 INFO L93 Difference]: Finished difference Result 15732 states and 27855 transitions. [2021-11-13 02:34:53,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:34:53,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 83 [2021-11-13 02:34:53,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:53,974 INFO L225 Difference]: With dead ends: 15732 [2021-11-13 02:34:53,974 INFO L226 Difference]: Without dead ends: 10826 [2021-11-13 02:34:54,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:34:54,014 INFO L933 BasicCegarLoop]: 1109 mSDtfsCounter, 917 mSDsluCounter, 3883 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 40 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5137.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 4992 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.96ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5333.42ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:54,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 4992 Invalid, 388 Unknown, 0 Unchecked, 15.96ms Time], IncrementalHoareTripleChecker [40 Valid, 346 Invalid, 2 Unknown, 0 Unchecked, 5333.42ms Time] [2021-11-13 02:34:54,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10826 states. [2021-11-13 02:34:54,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10826 to 9822. [2021-11-13 02:34:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9822 states, 7586 states have (on average 1.596493540732929) internal successors, (12111), 7920 states have internal predecessors, (12111), 1731 states have call successors, (1731), 459 states have call predecessors, (1731), 504 states have return successors, (2914), 1718 states have call predecessors, (2914), 1709 states have call successors, (2914) [2021-11-13 02:34:55,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9822 states to 9822 states and 16756 transitions. [2021-11-13 02:34:55,050 INFO L78 Accepts]: Start accepts. Automaton has 9822 states and 16756 transitions. Word has length 83 [2021-11-13 02:34:55,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:55,050 INFO L470 AbstractCegarLoop]: Abstraction has 9822 states and 16756 transitions. [2021-11-13 02:34:55,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-13 02:34:55,051 INFO L276 IsEmpty]: Start isEmpty. Operand 9822 states and 16756 transitions. [2021-11-13 02:34:55,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-13 02:34:55,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:55,053 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:55,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-13 02:34:55,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:55,268 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:55,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:55,268 INFO L85 PathProgramCache]: Analyzing trace with hash 475861302, now seen corresponding path program 1 times [2021-11-13 02:34:55,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:55,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893344530] [2021-11-13 02:34:55,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:55,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:55,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:55,270 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:55,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 02:34:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:55,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:34:55,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:34:55,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 02:34:56,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:56,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893344530] [2021-11-13 02:34:56,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893344530] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:56,133 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:56,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 02:34:56,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356000275] [2021-11-13 02:34:56,134 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:56,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:34:56,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:56,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:34:56,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:34:56,136 INFO L87 Difference]: Start difference. First operand 9822 states and 16756 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 02:34:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:56,928 INFO L93 Difference]: Finished difference Result 19746 states and 34209 transitions. [2021-11-13 02:34:56,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:34:56,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 84 [2021-11-13 02:34:56,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:57,035 INFO L225 Difference]: With dead ends: 19746 [2021-11-13 02:34:57,035 INFO L226 Difference]: Without dead ends: 9942 [2021-11-13 02:34:57,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:34:57,110 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 21 mSDsluCounter, 1685 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2539 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.71ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 107.72ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:57,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 2539 Invalid, 80 Unknown, 0 Unchecked, 5.71ms Time], IncrementalHoareTripleChecker [19 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 107.72ms Time] [2021-11-13 02:34:57,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9942 states. [2021-11-13 02:34:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9942 to 9922. [2021-11-13 02:34:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9922 states, 7676 states have (on average 1.5908025013027618) internal successors, (12211), 7990 states have internal predecessors, (12211), 1731 states have call successors, (1731), 499 states have call predecessors, (1731), 514 states have return successors, (2872), 1708 states have call predecessors, (2872), 1709 states have call successors, (2872) [2021-11-13 02:34:57,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9922 states to 9922 states and 16814 transitions. [2021-11-13 02:34:57,933 INFO L78 Accepts]: Start accepts. Automaton has 9922 states and 16814 transitions. Word has length 84 [2021-11-13 02:34:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:57,935 INFO L470 AbstractCegarLoop]: Abstraction has 9922 states and 16814 transitions. [2021-11-13 02:34:57,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 02:34:57,936 INFO L276 IsEmpty]: Start isEmpty. Operand 9922 states and 16814 transitions. [2021-11-13 02:34:57,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-13 02:34:57,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:57,937 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:57,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:58,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:58,152 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:58,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:58,152 INFO L85 PathProgramCache]: Analyzing trace with hash -544941312, now seen corresponding path program 1 times [2021-11-13 02:34:58,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:58,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677692206] [2021-11-13 02:34:58,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:58,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:58,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:58,154 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:58,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 02:34:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:58,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:34:58,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:34:58,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:34:59,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:59,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677692206] [2021-11-13 02:34:59,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677692206] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:59,249 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:59,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-13 02:34:59,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011800588] [2021-11-13 02:34:59,250 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:59,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:34:59,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:59,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:34:59,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:59,251 INFO L87 Difference]: Start difference. First operand 9922 states and 16814 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 3 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 02:35:01,279 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 [] [2021-11-13 02:35:03,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:03,841 INFO L93 Difference]: Finished difference Result 31654 states and 59282 transitions. [2021-11-13 02:35:03,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:35:03,843 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 3 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 93 [2021-11-13 02:35:03,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:04,252 INFO L225 Difference]: With dead ends: 31654 [2021-11-13 02:35:04,252 INFO L226 Difference]: Without dead ends: 21750 [2021-11-13 02:35:04,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:35:04,361 INFO L933 BasicCegarLoop]: 1114 mSDtfsCounter, 891 mSDsluCounter, 4760 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3310.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 5874 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.16ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3549.97ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:04,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 5874 Invalid, 653 Unknown, 0 Unchecked, 15.16ms Time], IncrementalHoareTripleChecker [32 Valid, 620 Invalid, 1 Unknown, 0 Unchecked, 3549.97ms Time] [2021-11-13 02:35:04,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21750 states. [2021-11-13 02:35:05,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21750 to 19898. [2021-11-13 02:35:05,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19898 states, 15389 states have (on average 1.5859380076678147) internal successors, (24406), 16035 states have internal predecessors, (24406), 3442 states have call successors, (3442), 995 states have call predecessors, (3442), 1066 states have return successors, (7347), 3419 states have call predecessors, (7347), 3400 states have call successors, (7347) [2021-11-13 02:35:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19898 states to 19898 states and 35195 transitions. [2021-11-13 02:35:06,245 INFO L78 Accepts]: Start accepts. Automaton has 19898 states and 35195 transitions. Word has length 93 [2021-11-13 02:35:06,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:06,246 INFO L470 AbstractCegarLoop]: Abstraction has 19898 states and 35195 transitions. [2021-11-13 02:35:06,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 3 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 02:35:06,247 INFO L276 IsEmpty]: Start isEmpty. Operand 19898 states and 35195 transitions. [2021-11-13 02:35:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-13 02:35:06,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:06,248 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:06,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:06,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:35:06,462 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:06,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:06,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1425169813, now seen corresponding path program 1 times [2021-11-13 02:35:06,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:35:06,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422406255] [2021-11-13 02:35:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:06,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:35:06,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:35:06,466 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:35:06,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 02:35:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:07,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:35:07,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 02:35:07,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:35:07,502 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:35:07,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422406255] [2021-11-13 02:35:07,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422406255] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:07,502 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:35:07,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 02:35:07,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000286647] [2021-11-13 02:35:07,505 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:07,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:35:07,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:35:07,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:35:07,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:35:07,506 INFO L87 Difference]: Start difference. First operand 19898 states and 35195 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 02:35:08,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:08,797 INFO L93 Difference]: Finished difference Result 40018 states and 72413 transitions. [2021-11-13 02:35:08,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:35:08,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 94 [2021-11-13 02:35:08,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:09,051 INFO L225 Difference]: With dead ends: 40018 [2021-11-13 02:35:09,052 INFO L226 Difference]: Without dead ends: 20138 [2021-11-13 02:35:09,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:35:09,294 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 21 mSDsluCounter, 2527 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3381 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.58ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.39ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:09,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3381 Invalid, 88 Unknown, 0 Unchecked, 3.58ms Time], IncrementalHoareTripleChecker [12 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 79.39ms Time] [2021-11-13 02:35:09,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20138 states. [2021-11-13 02:35:10,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20138 to 20098. [2021-11-13 02:35:10,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20098 states, 15569 states have (on average 1.580448326803263) internal successors, (24606), 16215 states have internal predecessors, (24606), 3442 states have call successors, (3442), 1035 states have call predecessors, (3442), 1086 states have return successors, (7287), 3399 states have call predecessors, (7287), 3400 states have call successors, (7287) [2021-11-13 02:35:10,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20098 states to 20098 states and 35335 transitions. [2021-11-13 02:35:10,870 INFO L78 Accepts]: Start accepts. Automaton has 20098 states and 35335 transitions. Word has length 94 [2021-11-13 02:35:10,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:10,871 INFO L470 AbstractCegarLoop]: Abstraction has 20098 states and 35335 transitions. [2021-11-13 02:35:10,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 02:35:10,872 INFO L276 IsEmpty]: Start isEmpty. Operand 20098 states and 35335 transitions. [2021-11-13 02:35:10,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 02:35:10,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:10,874 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:10,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:11,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:35:11,088 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:11,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:11,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2101931910, now seen corresponding path program 1 times [2021-11-13 02:35:11,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:35:11,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687948851] [2021-11-13 02:35:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:11,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:35:11,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:35:11,092 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:35:11,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 02:35:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:11,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:35:11,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 02:35:12,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 02:35:12,432 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:35:12,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687948851] [2021-11-13 02:35:12,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687948851] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:12,433 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:35:12,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-13 02:35:12,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176251490] [2021-11-13 02:35:12,433 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:12,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:35:12,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:35:12,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:35:12,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:35:12,435 INFO L87 Difference]: Start difference. First operand 20098 states and 35335 transitions. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 6 states have internal predecessors, (107), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-13 02:35:14,471 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 [] [2021-11-13 02:35:18,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:18,422 INFO L93 Difference]: Finished difference Result 63890 states and 131168 transitions. [2021-11-13 02:35:18,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:35:18,424 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 6 states have internal predecessors, (107), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 104 [2021-11-13 02:35:18,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:19,132 INFO L225 Difference]: With dead ends: 63890 [2021-11-13 02:35:19,138 INFO L226 Difference]: Without dead ends: 43810 [2021-11-13 02:35:19,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:35:19,348 INFO L933 BasicCegarLoop]: 1101 mSDtfsCounter, 896 mSDsluCounter, 4550 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3319.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 5651 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.58ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3529.51ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:19,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 5651 Invalid, 605 Unknown, 0 Unchecked, 12.58ms Time], IncrementalHoareTripleChecker [38 Valid, 566 Invalid, 1 Unknown, 0 Unchecked, 3529.51ms Time] [2021-11-13 02:35:19,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43810 states. [2021-11-13 02:35:22,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43810 to 40390. [2021-11-13 02:35:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40390 states, 31270 states have (on average 1.5757275343779982) internal successors, (49273), 32600 states have internal predecessors, (49273), 6869 states have call successors, (6869), 2067 states have call predecessors, (6869), 2250 states have return successors, (19742), 6826 states have call predecessors, (19742), 6787 states have call successors, (19742) [2021-11-13 02:35:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40390 states to 40390 states and 75884 transitions. [2021-11-13 02:35:23,690 INFO L78 Accepts]: Start accepts. Automaton has 40390 states and 75884 transitions. Word has length 104 [2021-11-13 02:35:23,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:23,691 INFO L470 AbstractCegarLoop]: Abstraction has 40390 states and 75884 transitions. [2021-11-13 02:35:23,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 6 states have internal predecessors, (107), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-13 02:35:23,691 INFO L276 IsEmpty]: Start isEmpty. Operand 40390 states and 75884 transitions. [2021-11-13 02:35:23,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-13 02:35:23,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:23,693 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:23,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-13 02:35:23,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:35:23,911 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:23,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:23,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1664149346, now seen corresponding path program 1 times [2021-11-13 02:35:23,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:35:23,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330991843] [2021-11-13 02:35:23,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:23,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:35:23,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:35:23,915 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:35:23,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 02:35:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:24,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:35:24,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 02:35:25,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 02:35:25,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:35:25,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330991843] [2021-11-13 02:35:25,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330991843] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:25,435 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:35:25,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-13 02:35:25,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109163460] [2021-11-13 02:35:25,435 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:25,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:35:25,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:35:25,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:35:25,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:35:25,437 INFO L87 Difference]: Start difference. First operand 40390 states and 75884 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 4 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:35:31,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:31,341 INFO L93 Difference]: Finished difference Result 121918 states and 230105 transitions. [2021-11-13 02:35:31,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:35:31,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 4 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 105 [2021-11-13 02:35:31,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:32,120 INFO L225 Difference]: With dead ends: 121918 [2021-11-13 02:35:32,121 INFO L226 Difference]: Without dead ends: 82675 [2021-11-13 02:35:32,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:35:32,727 INFO L933 BasicCegarLoop]: 1225 mSDtfsCounter, 2119 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 864.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2119 SdHoareTripleChecker+Valid, 2716 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.14ms SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1034.80ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:32,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2119 Valid, 2716 Invalid, 402 Unknown, 0 Unchecked, 8.14ms Time], IncrementalHoareTripleChecker [175 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 1034.80ms Time] [2021-11-13 02:35:32,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82675 states. [2021-11-13 02:35:36,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82675 to 77242. [2021-11-13 02:35:37,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77242 states, 60519 states have (on average 1.5743155042218147) internal successors, (95276), 62435 states have internal predecessors, (95276), 12546 states have call successors, (12546), 3965 states have call predecessors, (12546), 4176 states have return successors, (38297), 12013 states have call predecessors, (38297), 12379 states have call successors, (38297) [2021-11-13 02:35:38,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77242 states to 77242 states and 146119 transitions. [2021-11-13 02:35:38,949 INFO L78 Accepts]: Start accepts. Automaton has 77242 states and 146119 transitions. Word has length 105 [2021-11-13 02:35:38,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:38,950 INFO L470 AbstractCegarLoop]: Abstraction has 77242 states and 146119 transitions. [2021-11-13 02:35:38,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 4 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:35:38,951 INFO L276 IsEmpty]: Start isEmpty. Operand 77242 states and 146119 transitions. [2021-11-13 02:35:38,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-13 02:35:38,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:38,956 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:38,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:39,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:35:39,179 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:39,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:39,180 INFO L85 PathProgramCache]: Analyzing trace with hash -258240288, now seen corresponding path program 1 times [2021-11-13 02:35:39,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:35:39,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684137893] [2021-11-13 02:35:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:39,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:35:39,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:35:39,182 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:35:39,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dea145-e81c-4046-b6a0-1e235eb7df67/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 02:35:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:39,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:35:39,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 02:35:40,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 02:35:40,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:35:40,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684137893] [2021-11-13 02:35:40,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684137893] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:40,589 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:35:40,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 02:35:40,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21359716] [2021-11-13 02:35:40,590 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:40,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:35:40,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:35:40,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:35:40,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:35:40,591 INFO L87 Difference]: Start difference. First operand 77242 states and 146119 transitions. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 7 states have call successors, (31), 6 states have call predecessors, (31), 7 states have return successors, (29), 5 states have call predecessors, (29), 7 states have call successors, (29) [2021-11-13 02:35:42,624 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 [] [2021-11-13 02:35:44,631 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 [] [2021-11-13 02:36:08,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:08,746 INFO L93 Difference]: Finished difference Result 218796 states and 475431 transitions. [2021-11-13 02:36:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-13 02:36:08,746 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 7 states have call successors, (31), 6 states have call predecessors, (31), 7 states have return successors, (29), 5 states have call predecessors, (29), 7 states have call successors, (29) Word has length 139 [2021-11-13 02:36:08,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:10,849 INFO L225 Difference]: With dead ends: 218796 [2021-11-13 02:36:10,849 INFO L226 Difference]: Without dead ends: 141572 [2021-11-13 02:36:13,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-11-13 02:36:13,294 INFO L933 BasicCegarLoop]: 1513 mSDtfsCounter, 5664 mSDsluCounter, 2962 mSDsCounter, 0 mSdLazyCounter, 6482 mSolverCounterSat, 1765 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13362.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5770 SdHoareTripleChecker+Valid, 4475 SdHoareTripleChecker+Invalid, 8249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 72.49ms SdHoareTripleChecker+Time, 1765 IncrementalHoareTripleChecker+Valid, 6482 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15192.09ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:13,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5770 Valid, 4475 Invalid, 8249 Unknown, 0 Unchecked, 72.49ms Time], IncrementalHoareTripleChecker [1765 Valid, 6482 Invalid, 2 Unknown, 0 Unchecked, 15192.09ms Time] [2021-11-13 02:36:13,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141572 states.