./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product32.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_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/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_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/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_1fed02c3-0cbe-4a5f-a380-a1080f039d78/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 5ead0301c8481fccc00f115bae086423ed9e315d4392b2a0732a4d381346437b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:37:58,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:37:58,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:37:58,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:37:58,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:37:58,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:37:58,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:37:58,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:37:58,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:37:58,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:37:58,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:37:58,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:37:58,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:37:58,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:37:58,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:37:58,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:37:58,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:37:58,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:37:58,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:37:58,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:37:58,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:37:58,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:37:58,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:37:58,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:37:58,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:37:58,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:37:58,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:37:58,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:37:58,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:37:58,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:37:58,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:37:58,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:37:58,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:37:58,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:37:58,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:37:58,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:37:58,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:37:58,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:37:58,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:37:58,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:37:58,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:37:58,265 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:37:58,309 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:37:58,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:37:58,310 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:37:58,311 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:37:58,311 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:37:58,311 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:37:58,311 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:37:58,312 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:37:58,312 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:37:58,312 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:37:58,313 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:37:58,313 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:37:58,314 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:37:58,314 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:37:58,314 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:37:58,314 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:37:58,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:37:58,315 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:37:58,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:37:58,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:37:58,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:37:58,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:37:58,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:37:58,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:37:58,317 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:37:58,317 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:37:58,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:37:58,317 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:37:58,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:37:58,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:37:58,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:37:58,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:37:58,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:37:58,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:37:58,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:37:58,319 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:37:58,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:37:58,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:37:58,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:37:58,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:37:58,320 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_1fed02c3-0cbe-4a5f-a380-a1080f039d78/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ead0301c8481fccc00f115bae086423ed9e315d4392b2a0732a4d381346437b [2021-11-12 23:37:58,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:37:58,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:37:58,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:37:58,719 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:37:58,720 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:37:58,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c [2021-11-12 23:37:58,784 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/data/322794b62/2b3f05f2350a469fb85f46ed2044ca60/FLAG3c7c46d62 [2021-11-12 23:37:59,404 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:37:59,412 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c [2021-11-12 23:37:59,442 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/data/322794b62/2b3f05f2350a469fb85f46ed2044ca60/FLAG3c7c46d62 [2021-11-12 23:37:59,598 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/data/322794b62/2b3f05f2350a469fb85f46ed2044ca60 [2021-11-12 23:37:59,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:37:59,602 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:37:59,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:37:59,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:37:59,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:37:59,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:37:59" (1/1) ... [2021-11-12 23:37:59,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a1f42a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:59, skipping insertion in model container [2021-11-12 23:37:59,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:37:59" (1/1) ... [2021-11-12 23:37:59,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:37:59,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:38:00,348 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_1fed02c3-0cbe-4a5f-a380-a1080f039d78/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c[71521,71534] [2021-11-12 23:38:00,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:38:00,368 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:38:00,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7f91ef52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:00, skipping insertion in model container [2021-11-12 23:38:00,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:38:00,369 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:38:00,371 INFO L158 Benchmark]: Toolchain (without parser) took 767.74ms. Allocated memory is still 98.6MB. Free memory was 58.0MB in the beginning and 57.7MB in the end (delta: 370.8kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:38:00,372 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 98.6MB. Free memory is still 76.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:38:00,373 INFO L158 Benchmark]: CACSL2BoogieTranslator took 764.98ms. Allocated memory is still 98.6MB. Free memory was 57.8MB in the beginning and 57.7MB in the end (delta: 142.0kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:38:00,374 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 98.6MB. Free memory is still 76.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 764.98ms. Allocated memory is still 98.6MB. Free memory was 57.8MB in the beginning and 57.7MB in the end (delta: 142.0kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 574]: 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_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/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_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/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_1fed02c3-0cbe-4a5f-a380-a1080f039d78/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 5ead0301c8481fccc00f115bae086423ed9e315d4392b2a0732a4d381346437b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:38:02,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:38:02,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:38:02,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:38:02,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:38:02,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:38:02,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:38:02,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:38:02,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:38:02,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:38:02,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:38:02,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:38:02,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:38:02,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:38:02,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:38:02,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:38:02,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:38:02,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:38:02,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:38:02,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:38:02,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:38:02,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:38:02,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:38:02,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:38:02,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:38:02,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:38:02,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:38:02,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:38:02,755 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:38:02,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:38:02,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:38:02,757 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:38:02,759 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:38:02,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:38:02,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:38:02,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:38:02,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:38:02,763 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:38:02,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:38:02,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:38:02,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:38:02,771 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:38:02,814 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:38:02,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:38:02,816 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:38:02,816 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:38:02,817 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:38:02,817 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:38:02,817 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:38:02,817 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:38:02,818 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:38:02,818 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:38:02,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:38:02,820 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:38:02,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:38:02,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:38:02,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:38:02,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:38:02,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:38:02,822 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:38:02,822 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:38:02,822 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:38:02,823 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:38:02,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:38:02,823 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:38:02,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:38:02,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:38:02,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:38:02,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:38:02,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:38:02,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:38:02,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:38:02,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:38:02,825 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:38:02,826 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:02,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:38:02,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:38:02,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:38:02,827 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_1fed02c3-0cbe-4a5f-a380-a1080f039d78/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ead0301c8481fccc00f115bae086423ed9e315d4392b2a0732a4d381346437b [2021-11-12 23:38:03,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:38:03,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:38:03,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:38:03,271 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:38:03,274 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:38:03,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c [2021-11-12 23:38:03,353 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/data/d07bfc71e/68bd245e63294abbb5e8dd1ec0b78d11/FLAGfd210b618 [2021-11-12 23:38:04,107 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:38:04,108 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c [2021-11-12 23:38:04,139 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/data/d07bfc71e/68bd245e63294abbb5e8dd1ec0b78d11/FLAGfd210b618 [2021-11-12 23:38:04,390 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/data/d07bfc71e/68bd245e63294abbb5e8dd1ec0b78d11 [2021-11-12 23:38:04,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:38:04,395 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:38:04,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:38:04,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:38:04,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:38:04,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:38:04" (1/1) ... [2021-11-12 23:38:04,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28e86866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:04, skipping insertion in model container [2021-11-12 23:38:04,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:38:04" (1/1) ... [2021-11-12 23:38:04,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:38:04,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:38:05,140 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_1fed02c3-0cbe-4a5f-a380-a1080f039d78/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c[71521,71534] [2021-11-12 23:38:05,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:38:05,158 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:38:05,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:38:05,355 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_1fed02c3-0cbe-4a5f-a380-a1080f039d78/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c[71521,71534] [2021-11-12 23:38:05,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:38:05,361 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:38:05,491 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_1fed02c3-0cbe-4a5f-a380-a1080f039d78/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c[71521,71534] [2021-11-12 23:38:05,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:38:05,535 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:38:05,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:05 WrapperNode [2021-11-12 23:38:05,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:38:05,537 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:38:05,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:38:05,538 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:38:05,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:05" (1/1) ... [2021-11-12 23:38:05,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:05" (1/1) ... [2021-11-12 23:38:05,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:38:05,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:38:05,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:38:05,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:38:05,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:05" (1/1) ... [2021-11-12 23:38:05,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:05" (1/1) ... [2021-11-12 23:38:05,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:05" (1/1) ... [2021-11-12 23:38:05,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:05" (1/1) ... [2021-11-12 23:38:05,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:05" (1/1) ... [2021-11-12 23:38:05,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:05" (1/1) ... [2021-11-12 23:38:05,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:05" (1/1) ... [2021-11-12 23:38:05,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:38:05,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:38:05,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:38:05,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:38:05,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:05" (1/1) ... [2021-11-12 23:38:05,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:38:05,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:38:05,875 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:38:05,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:38:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 23:38:05,927 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 23:38:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:38:05,928 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:38:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:38:05,928 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:38:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 23:38:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 23:38:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:38:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:38:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:38:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:38:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:38:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:38:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:38:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:38:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 23:38:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 23:38:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:38:05,931 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:38:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:38:05,931 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:38:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 23:38:05,931 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 23:38:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:38:05,932 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:38:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:38:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 23:38:05,932 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 23:38:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 23:38:05,933 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 23:38:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:38:05,934 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:38:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:38:05,934 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:38:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 23:38:05,934 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 23:38:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:38:05,935 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:38:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:38:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:38:05,935 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:38:05,936 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:38:05,936 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:38:05,936 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:38:05,936 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:38:05,936 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:38:05,937 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:38:05,937 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:38:05,938 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:38:05,939 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:38:05,939 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:38:05,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:38:05,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:38:05,940 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:38:05,940 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:38:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-12 23:38:05,941 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-12 23:38:09,975 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:38:09,975 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:38:09,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:38:09 BoogieIcfgContainer [2021-11-12 23:38:09,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:38:10,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:38:10,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:38:10,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:38:10,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:38:04" (1/3) ... [2021-11-12 23:38:10,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145219c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:38:10, skipping insertion in model container [2021-11-12 23:38:10,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:05" (2/3) ... [2021-11-12 23:38:10,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145219c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:38:10, skipping insertion in model container [2021-11-12 23:38:10,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:38:09" (3/3) ... [2021-11-12 23:38:10,009 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product32.cil.c [2021-11-12 23:38:10,015 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:38:10,016 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:38:10,088 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:38:10,098 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:38:10,098 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:38:10,152 INFO L276 IsEmpty]: Start isEmpty. Operand has 581 states, 449 states have (on average 1.6614699331848553) internal successors, (746), 467 states have internal predecessors, (746), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:38:10,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-12 23:38:10,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:10,180 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:10,181 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:10,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:10,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1262274351, now seen corresponding path program 1 times [2021-11-12 23:38:10,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:10,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799585512] [2021-11-12 23:38:10,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:10,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:10,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:10,209 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:10,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:38:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:10,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:38:10,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:38:11,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:11,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:38:11,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:11,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799585512] [2021-11-12 23:38:11,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799585512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:11,315 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:11,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:38:11,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304896548] [2021-11-12 23:38:11,318 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:11,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:38:11,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:11,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:38:11,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:38:11,363 INFO L87 Difference]: Start difference. First operand has 581 states, 449 states have (on average 1.6614699331848553) internal successors, (746), 467 states have internal predecessors, (746), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:38:11,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:11,658 INFO L93 Difference]: Finished difference Result 1157 states and 1906 transitions. [2021-11-12 23:38:11,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:38:11,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 63 [2021-11-12 23:38:11,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:11,697 INFO L225 Difference]: With dead ends: 1157 [2021-11-12 23:38:11,698 INFO L226 Difference]: Without dead ends: 576 [2021-11-12 23:38:11,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:38:11,717 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 16 mSDsluCounter, 3722 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 4656 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.36ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:11,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 4656 Invalid, 55 Unknown, 0 Unchecked, 38.36ms Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 61.31ms Time] [2021-11-12 23:38:11,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-12 23:38:11,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2021-11-12 23:38:11,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 445 states have (on average 1.6404494382022472) internal successors, (730), 462 states have internal predecessors, (730), 103 states have call successors, (103), 28 states have call predecessors, (103), 27 states have return successors, (102), 99 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-12 23:38:11,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 935 transitions. [2021-11-12 23:38:11,827 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 935 transitions. Word has length 63 [2021-11-12 23:38:11,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:11,828 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 935 transitions. [2021-11-12 23:38:11,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:38:11,828 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 935 transitions. [2021-11-12 23:38:11,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:38:11,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:11,833 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:11,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:12,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:12,052 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:12,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:12,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1711845813, now seen corresponding path program 1 times [2021-11-12 23:38:12,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:12,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432409880] [2021-11-12 23:38:12,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:12,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:12,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:12,058 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:12,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:38:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:12,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:38:12,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:38:12,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:38:13,156 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:13,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432409880] [2021-11-12 23:38:13,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432409880] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:13,157 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:13,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:38:13,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702489967] [2021-11-12 23:38:13,158 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:13,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:38:13,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:13,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:38:13,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:38:13,160 INFO L87 Difference]: Start difference. First operand 576 states and 935 transitions. Second operand has 11 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 23:38:13,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:13,449 INFO L93 Difference]: Finished difference Result 1140 states and 1862 transitions. [2021-11-12 23:38:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:38:13,451 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 68 [2021-11-12 23:38:13,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:13,462 INFO L225 Difference]: With dead ends: 1140 [2021-11-12 23:38:13,462 INFO L226 Difference]: Without dead ends: 585 [2021-11-12 23:38:13,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:38:13,470 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 118 mSDsluCounter, 5414 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 141.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 6333 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 45.76ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 161.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:13,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 6333 Invalid, 93 Unknown, 0 Unchecked, 45.76ms Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 161.69ms Time] [2021-11-12 23:38:13,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-11-12 23:38:13,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 585. [2021-11-12 23:38:13,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 453 states have (on average 1.640176600441501) internal successors, (743), 471 states have internal predecessors, (743), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (103), 99 states have call predecessors, (103), 102 states have call successors, (103) [2021-11-12 23:38:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 949 transitions. [2021-11-12 23:38:13,550 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 949 transitions. Word has length 68 [2021-11-12 23:38:13,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:13,551 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 949 transitions. [2021-11-12 23:38:13,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 23:38:13,551 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 949 transitions. [2021-11-12 23:38:13,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 23:38:13,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:13,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:13,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:13,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:13,772 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:13,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:13,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1898400757, now seen corresponding path program 1 times [2021-11-12 23:38:13,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:13,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654255697] [2021-11-12 23:38:13,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:13,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:13,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:13,775 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:13,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:38:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:14,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:38:14,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:38:14,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:38:14,614 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:14,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654255697] [2021-11-12 23:38:14,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654255697] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:14,615 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:14,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:38:14,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243833576] [2021-11-12 23:38:14,616 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:14,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:38:14,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:14,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:38:14,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:38:14,618 INFO L87 Difference]: Start difference. First operand 585 states and 949 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:38:14,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:14,951 INFO L93 Difference]: Finished difference Result 1196 states and 1953 transitions. [2021-11-12 23:38:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:38:14,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 69 [2021-11-12 23:38:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:14,962 INFO L225 Difference]: With dead ends: 1196 [2021-11-12 23:38:14,962 INFO L226 Difference]: Without dead ends: 599 [2021-11-12 23:38:14,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:38:14,971 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 243 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1770 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.50ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 245.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:14,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 1770 Invalid, 195 Unknown, 0 Unchecked, 8.50ms Time], IncrementalHoareTripleChecker [36 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 245.55ms Time] [2021-11-12 23:38:14,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-12 23:38:15,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 590. [2021-11-12 23:38:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 458 states have (on average 1.5851528384279476) internal successors, (726), 475 states have internal predecessors, (726), 103 states have call successors, (103), 29 states have call predecessors, (103), 28 states have return successors, (102), 99 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-12 23:38:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 931 transitions. [2021-11-12 23:38:15,034 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 931 transitions. Word has length 69 [2021-11-12 23:38:15,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:15,036 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 931 transitions. [2021-11-12 23:38:15,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:38:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 931 transitions. [2021-11-12 23:38:15,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:38:15,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:15,040 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:15,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:15,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:15,253 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:15,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:15,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1560263654, now seen corresponding path program 1 times [2021-11-12 23:38:15,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:15,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259161195] [2021-11-12 23:38:15,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:15,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:15,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:15,260 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:15,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:38:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:15,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:38:15,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:38:15,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:38:16,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:16,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259161195] [2021-11-12 23:38:16,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259161195] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:16,268 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:16,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:38:16,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195039671] [2021-11-12 23:38:16,268 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:16,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:38:16,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:16,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:38:16,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:38:16,270 INFO L87 Difference]: Start difference. First operand 590 states and 931 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 23:38:16,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:16,462 INFO L93 Difference]: Finished difference Result 1138 states and 1816 transitions. [2021-11-12 23:38:16,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:38:16,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 71 [2021-11-12 23:38:16,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:16,470 INFO L225 Difference]: With dead ends: 1138 [2021-11-12 23:38:16,471 INFO L226 Difference]: Without dead ends: 578 [2021-11-12 23:38:16,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:38:16,483 INFO L933 BasicCegarLoop]: 900 mSDtfsCounter, 137 mSDsluCounter, 3557 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 4457 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.59ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 118.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:16,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 4457 Invalid, 70 Unknown, 0 Unchecked, 8.59ms Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 118.81ms Time] [2021-11-12 23:38:16,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-11-12 23:38:16,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 569. [2021-11-12 23:38:16,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 437 states have (on average 1.597254004576659) internal successors, (698), 454 states have internal predecessors, (698), 103 states have call successors, (103), 29 states have call predecessors, (103), 28 states have return successors, (102), 99 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-12 23:38:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 903 transitions. [2021-11-12 23:38:16,521 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 903 transitions. Word has length 71 [2021-11-12 23:38:16,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:16,522 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 903 transitions. [2021-11-12 23:38:16,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 23:38:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 903 transitions. [2021-11-12 23:38:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 23:38:16,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:16,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:16,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:16,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:16,740 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:16,741 INFO L85 PathProgramCache]: Analyzing trace with hash 501420920, now seen corresponding path program 1 times [2021-11-12 23:38:16,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:16,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777608973] [2021-11-12 23:38:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:16,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:16,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:16,743 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:16,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:38:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:17,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:38:17,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:38:17,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:17,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:38:17,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:17,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777608973] [2021-11-12 23:38:17,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777608973] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:17,898 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:17,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:38:17,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322314419] [2021-11-12 23:38:17,899 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:17,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:38:17,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:17,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:38:17,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:38:17,900 INFO L87 Difference]: Start difference. First operand 569 states and 903 transitions. Second operand has 13 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 23:38:18,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:18,356 INFO L93 Difference]: Finished difference Result 1107 states and 1771 transitions. [2021-11-12 23:38:18,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:38:18,357 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 74 [2021-11-12 23:38:18,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:18,364 INFO L225 Difference]: With dead ends: 1107 [2021-11-12 23:38:18,364 INFO L226 Difference]: Without dead ends: 574 [2021-11-12 23:38:18,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:38:18,369 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 73 mSDsluCounter, 7712 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 276.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 8572 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.11ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 312.18ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:18,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 8572 Invalid, 240 Unknown, 0 Unchecked, 39.11ms Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 312.18ms Time] [2021-11-12 23:38:18,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-12 23:38:18,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 571. [2021-11-12 23:38:18,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 439 states have (on average 1.5922551252847381) internal successors, (699), 456 states have internal predecessors, (699), 103 states have call successors, (103), 29 states have call predecessors, (103), 28 states have return successors, (102), 99 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-12 23:38:18,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 904 transitions. [2021-11-12 23:38:18,398 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 904 transitions. Word has length 74 [2021-11-12 23:38:18,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:18,399 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 904 transitions. [2021-11-12 23:38:18,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 23:38:18,399 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 904 transitions. [2021-11-12 23:38:18,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 23:38:18,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:18,401 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:18,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:18,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:18,618 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:18,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:18,619 INFO L85 PathProgramCache]: Analyzing trace with hash 911971252, now seen corresponding path program 1 times [2021-11-12 23:38:18,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:18,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952936803] [2021-11-12 23:38:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:18,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:18,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:18,621 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:18,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:38:19,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:19,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:38:19,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:38:19,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:38:19,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:19,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952936803] [2021-11-12 23:38:19,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952936803] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:19,799 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:19,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-12 23:38:19,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503743282] [2021-11-12 23:38:19,800 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:19,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:38:19,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:19,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:38:19,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:38:19,801 INFO L87 Difference]: Start difference. First operand 571 states and 904 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:38:21,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:21,333 INFO L93 Difference]: Finished difference Result 2127 states and 3450 transitions. [2021-11-12 23:38:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:38:21,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 75 [2021-11-12 23:38:21,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:21,351 INFO L225 Difference]: With dead ends: 2127 [2021-11-12 23:38:21,351 INFO L226 Difference]: Without dead ends: 1599 [2021-11-12 23:38:21,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:38:21,357 INFO L933 BasicCegarLoop]: 1145 mSDtfsCounter, 2227 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1209.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2227 SdHoareTripleChecker+Valid, 2616 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.68ms SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1404.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:21,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2227 Valid, 2616 Invalid, 427 Unknown, 0 Unchecked, 13.68ms Time], IncrementalHoareTripleChecker [184 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1404.26ms Time] [2021-11-12 23:38:21,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-11-12 23:38:21,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1473. [2021-11-12 23:38:21,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1143 states have (on average 1.6176727909011372) internal successors, (1849), 1177 states have internal predecessors, (1849), 259 states have call successors, (259), 73 states have call predecessors, (259), 70 states have return successors, (272), 238 states have call predecessors, (272), 256 states have call successors, (272) [2021-11-12 23:38:21,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2380 transitions. [2021-11-12 23:38:21,465 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2380 transitions. Word has length 75 [2021-11-12 23:38:21,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:21,466 INFO L470 AbstractCegarLoop]: Abstraction has 1473 states and 2380 transitions. [2021-11-12 23:38:21,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:38:21,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2380 transitions. [2021-11-12 23:38:21,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-12 23:38:21,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:21,474 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:21,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:21,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:21,696 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:21,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:21,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1214675461, now seen corresponding path program 1 times [2021-11-12 23:38:21,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:21,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392161599] [2021-11-12 23:38:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:21,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:21,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:21,698 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:21,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:38:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:22,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:22,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:38:22,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:38:23,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:23,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392161599] [2021-11-12 23:38:23,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392161599] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:38:23,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:38:23,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:38:23,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491245059] [2021-11-12 23:38:23,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:23,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:38:23,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:23,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:38:23,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:38:23,117 INFO L87 Difference]: Start difference. First operand 1473 states and 2380 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:38:25,156 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:27,163 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:28,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:28,238 INFO L93 Difference]: Finished difference Result 2915 states and 4829 transitions. [2021-11-12 23:38:28,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:38:28,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 130 [2021-11-12 23:38:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:28,254 INFO L225 Difference]: With dead ends: 2915 [2021-11-12 23:38:28,255 INFO L226 Difference]: Without dead ends: 1485 [2021-11-12 23:38:28,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:38:28,269 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 827 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4857.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 2175 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.78ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4991.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:28,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 2175 Invalid, 476 Unknown, 0 Unchecked, 9.78ms Time], IncrementalHoareTripleChecker [16 Valid, 458 Invalid, 2 Unknown, 0 Unchecked, 4991.97ms Time] [2021-11-12 23:38:28,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2021-11-12 23:38:28,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 1485. [2021-11-12 23:38:28,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1152 states have (on average 1.6128472222222223) internal successors, (1858), 1186 states have internal predecessors, (1858), 259 states have call successors, (259), 76 states have call predecessors, (259), 73 states have return successors, (275), 238 states have call predecessors, (275), 256 states have call successors, (275) [2021-11-12 23:38:28,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2392 transitions. [2021-11-12 23:38:28,395 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2392 transitions. Word has length 130 [2021-11-12 23:38:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:28,395 INFO L470 AbstractCegarLoop]: Abstraction has 1485 states and 2392 transitions. [2021-11-12 23:38:28,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:38:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2392 transitions. [2021-11-12 23:38:28,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-12 23:38:28,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:28,404 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:28,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:28,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:28,617 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:28,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:28,618 INFO L85 PathProgramCache]: Analyzing trace with hash 815289499, now seen corresponding path program 1 times [2021-11-12 23:38:28,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:28,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23140091] [2021-11-12 23:38:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:28,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:28,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:28,620 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:28,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:38:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:29,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:38:29,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:38:29,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 23:38:29,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:29,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23140091] [2021-11-12 23:38:29,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23140091] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:38:29,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:38:29,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-12 23:38:29,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642561300] [2021-11-12 23:38:29,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:29,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:38:29,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:29,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:38:29,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:38:29,896 INFO L87 Difference]: Start difference. First operand 1485 states and 2392 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:38:31,930 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:32,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:32,735 INFO L93 Difference]: Finished difference Result 3134 states and 5013 transitions. [2021-11-12 23:38:32,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:38:32,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 132 [2021-11-12 23:38:32,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:32,754 INFO L225 Difference]: With dead ends: 3134 [2021-11-12 23:38:32,754 INFO L226 Difference]: Without dead ends: 1692 [2021-11-12 23:38:32,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:38:32,765 INFO L933 BasicCegarLoop]: 970 mSDtfsCounter, 628 mSDsluCounter, 3189 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2576.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 4159 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.95ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2679.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:32,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 4159 Invalid, 212 Unknown, 0 Unchecked, 11.95ms Time], IncrementalHoareTripleChecker [18 Valid, 193 Invalid, 1 Unknown, 0 Unchecked, 2679.21ms Time] [2021-11-12 23:38:32,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-11-12 23:38:32,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1686. [2021-11-12 23:38:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1293 states have (on average 1.546017014694509) internal successors, (1999), 1319 states have internal predecessors, (1999), 295 states have call successors, (295), 96 states have call predecessors, (295), 97 states have return successors, (344), 282 states have call predecessors, (344), 290 states have call successors, (344) [2021-11-12 23:38:32,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 2638 transitions. [2021-11-12 23:38:32,865 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 2638 transitions. Word has length 132 [2021-11-12 23:38:32,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:32,865 INFO L470 AbstractCegarLoop]: Abstraction has 1686 states and 2638 transitions. [2021-11-12 23:38:32,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:38:32,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 2638 transitions. [2021-11-12 23:38:32,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 23:38:32,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:32,876 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:32,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:33,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:33,096 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:33,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:33,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1301133774, now seen corresponding path program 1 times [2021-11-12 23:38:33,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:33,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502951972] [2021-11-12 23:38:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:33,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:33,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:33,099 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:33,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:38:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:33,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:33,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:38:33,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:38:34,489 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:34,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502951972] [2021-11-12 23:38:34,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502951972] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:38:34,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:38:34,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:38:34,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091932302] [2021-11-12 23:38:34,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:34,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:38:34,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:34,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:38:34,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:38:34,491 INFO L87 Difference]: Start difference. First operand 1686 states and 2638 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:38:36,520 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:38,525 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:39,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:39,799 INFO L93 Difference]: Finished difference Result 3354 states and 5400 transitions. [2021-11-12 23:38:39,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:38:39,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 133 [2021-11-12 23:38:39,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:39,817 INFO L225 Difference]: With dead ends: 3354 [2021-11-12 23:38:39,818 INFO L226 Difference]: Without dead ends: 1711 [2021-11-12 23:38:39,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:38:39,833 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 825 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5018.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 2176 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.00ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5166.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:39,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 2176 Invalid, 478 Unknown, 0 Unchecked, 9.00ms Time], IncrementalHoareTripleChecker [14 Valid, 462 Invalid, 2 Unknown, 0 Unchecked, 5166.37ms Time] [2021-11-12 23:38:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-11-12 23:38:39,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1711. [2021-11-12 23:38:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1313 states have (on average 1.5376999238385376) internal successors, (2019), 1339 states have internal predecessors, (2019), 295 states have call successors, (295), 101 states have call predecessors, (295), 102 states have return successors, (348), 282 states have call predecessors, (348), 290 states have call successors, (348) [2021-11-12 23:38:39,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2662 transitions. [2021-11-12 23:38:39,939 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2662 transitions. Word has length 133 [2021-11-12 23:38:39,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:39,939 INFO L470 AbstractCegarLoop]: Abstraction has 1711 states and 2662 transitions. [2021-11-12 23:38:39,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:38:39,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2662 transitions. [2021-11-12 23:38:39,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 23:38:39,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:39,947 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:39,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:40,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:40,160 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:40,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:40,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1185865247, now seen corresponding path program 1 times [2021-11-12 23:38:40,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:40,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100420521] [2021-11-12 23:38:40,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:40,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:40,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:40,163 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:40,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:38:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:40,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:40,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:38:41,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:38:41,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:41,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100420521] [2021-11-12 23:38:41,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100420521] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:38:41,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:38:41,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:38:41,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207135097] [2021-11-12 23:38:41,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:41,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:38:41,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:41,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:38:41,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:38:41,590 INFO L87 Difference]: Start difference. First operand 1711 states and 2662 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:38:43,619 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:45,626 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:46,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:46,737 INFO L93 Difference]: Finished difference Result 3409 states and 5449 transitions. [2021-11-12 23:38:46,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:38:46,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 136 [2021-11-12 23:38:46,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:46,754 INFO L225 Difference]: With dead ends: 3409 [2021-11-12 23:38:46,754 INFO L226 Difference]: Without dead ends: 1741 [2021-11-12 23:38:46,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:38:46,769 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 825 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4870.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 2176 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.29ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5007.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:46,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 2176 Invalid, 477 Unknown, 0 Unchecked, 7.29ms Time], IncrementalHoareTripleChecker [12 Valid, 463 Invalid, 2 Unknown, 0 Unchecked, 5007.89ms Time] [2021-11-12 23:38:46,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2021-11-12 23:38:46,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1741. [2021-11-12 23:38:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1338 states have (on average 1.5276532137518684) internal successors, (2044), 1364 states have internal predecessors, (2044), 295 states have call successors, (295), 106 states have call predecessors, (295), 107 states have return successors, (352), 282 states have call predecessors, (352), 290 states have call successors, (352) [2021-11-12 23:38:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2691 transitions. [2021-11-12 23:38:46,893 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2691 transitions. Word has length 136 [2021-11-12 23:38:46,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:46,893 INFO L470 AbstractCegarLoop]: Abstraction has 1741 states and 2691 transitions. [2021-11-12 23:38:46,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:38:46,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2691 transitions. [2021-11-12 23:38:46,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 23:38:46,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:46,901 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:46,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:47,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:47,120 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:47,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:47,120 INFO L85 PathProgramCache]: Analyzing trace with hash 338876642, now seen corresponding path program 1 times [2021-11-12 23:38:47,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:47,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726872194] [2021-11-12 23:38:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:47,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:47,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:47,121 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:47,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:38:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:47,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:47,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:38:47,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:38:48,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:48,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726872194] [2021-11-12 23:38:48,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726872194] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:38:48,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:38:48,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:38:48,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061846517] [2021-11-12 23:38:48,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:48,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:38:48,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:48,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:38:48,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:38:48,470 INFO L87 Difference]: Start difference. First operand 1741 states and 2691 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:38:50,503 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:52,510 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:53,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:53,593 INFO L93 Difference]: Finished difference Result 3474 states and 5508 transitions. [2021-11-12 23:38:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:38:53,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 139 [2021-11-12 23:38:53,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:53,612 INFO L225 Difference]: With dead ends: 3474 [2021-11-12 23:38:53,612 INFO L226 Difference]: Without dead ends: 1776 [2021-11-12 23:38:53,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:38:53,628 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 825 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4877.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 2176 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.58ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5013.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:53,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 2176 Invalid, 476 Unknown, 0 Unchecked, 6.58ms Time], IncrementalHoareTripleChecker [10 Valid, 464 Invalid, 2 Unknown, 0 Unchecked, 5013.56ms Time] [2021-11-12 23:38:53,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-11-12 23:38:53,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1776. [2021-11-12 23:38:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1368 states have (on average 1.5160818713450293) internal successors, (2074), 1394 states have internal predecessors, (2074), 295 states have call successors, (295), 111 states have call predecessors, (295), 112 states have return successors, (356), 282 states have call predecessors, (356), 290 states have call successors, (356) [2021-11-12 23:38:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 2725 transitions. [2021-11-12 23:38:53,731 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 2725 transitions. Word has length 139 [2021-11-12 23:38:53,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:53,731 INFO L470 AbstractCegarLoop]: Abstraction has 1776 states and 2725 transitions. [2021-11-12 23:38:53,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:38:53,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 2725 transitions. [2021-11-12 23:38:53,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 23:38:53,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:53,742 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:53,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:53,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:53,970 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:53,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:53,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1657557949, now seen corresponding path program 1 times [2021-11-12 23:38:53,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:53,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924774909] [2021-11-12 23:38:53,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:53,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:53,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:53,973 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:54,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:38:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:54,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:38:54,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:38:55,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 23:38:55,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:55,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924774909] [2021-11-12 23:38:55,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924774909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:55,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1590934068] [2021-11-12 23:38:55,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:55,771 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:55,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:38:55,790 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:38:55,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 23:38:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:56,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:38:56,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:38:56,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 23:38:57,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1590934068] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:57,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686604937] [2021-11-12 23:38:57,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:57,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:38:57,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:38:57,209 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:38:57,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 23:38:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:57,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:38:57,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:38:57,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 23:38:58,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686604937] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:58,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:38:58,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-12 23:38:58,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748200535] [2021-11-12 23:38:58,556 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:38:58,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:38:58,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:58,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:38:58,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:38:58,559 INFO L87 Difference]: Start difference. First operand 1776 states and 2725 transitions. Second operand has 18 states, 18 states have (on average 8.61111111111111) internal successors, (155), 14 states have internal predecessors, (155), 8 states have call successors, (32), 6 states have call predecessors, (32), 12 states have return successors, (33), 12 states have call predecessors, (33), 8 states have call successors, (33) [2021-11-12 23:39:00,582 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:02,588 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:04,594 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:06,600 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:08,607 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:22,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:22,780 INFO L93 Difference]: Finished difference Result 5934 states and 9426 transitions. [2021-11-12 23:39:22,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:39:22,781 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.61111111111111) internal successors, (155), 14 states have internal predecessors, (155), 8 states have call successors, (32), 6 states have call predecessors, (32), 12 states have return successors, (33), 12 states have call predecessors, (33), 8 states have call successors, (33) Word has length 142 [2021-11-12 23:39:22,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:22,813 INFO L225 Difference]: With dead ends: 5934 [2021-11-12 23:39:22,814 INFO L226 Difference]: Without dead ends: 4201 [2021-11-12 23:39:22,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 861 GetRequests, 832 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-11-12 23:39:22,827 INFO L933 BasicCegarLoop]: 1734 mSDtfsCounter, 2310 mSDsluCounter, 5815 mSDsCounter, 0 mSdLazyCounter, 12644 mSolverCounterSat, 862 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21858.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2396 SdHoareTripleChecker+Valid, 7549 SdHoareTripleChecker+Invalid, 13511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 71.65ms SdHoareTripleChecker+Time, 862 IncrementalHoareTripleChecker+Valid, 12644 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23585.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:22,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2396 Valid, 7549 Invalid, 13511 Unknown, 0 Unchecked, 71.65ms Time], IncrementalHoareTripleChecker [862 Valid, 12644 Invalid, 5 Unknown, 0 Unchecked, 23585.37ms Time] [2021-11-12 23:39:22,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-11-12 23:39:23,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3727. [2021-11-12 23:39:23,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3727 states, 2832 states have (on average 1.5070621468926553) internal successors, (4268), 2897 states have internal predecessors, (4268), 638 states have call successors, (638), 219 states have call predecessors, (638), 256 states have return successors, (876), 639 states have call predecessors, (876), 628 states have call successors, (876) [2021-11-12 23:39:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 5782 transitions. [2021-11-12 23:39:23,106 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 5782 transitions. Word has length 142 [2021-11-12 23:39:23,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:23,107 INFO L470 AbstractCegarLoop]: Abstraction has 3727 states and 5782 transitions. [2021-11-12 23:39:23,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.61111111111111) internal successors, (155), 14 states have internal predecessors, (155), 8 states have call successors, (32), 6 states have call predecessors, (32), 12 states have return successors, (33), 12 states have call predecessors, (33), 8 states have call successors, (33) [2021-11-12 23:39:23,108 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 5782 transitions. [2021-11-12 23:39:23,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 23:39:23,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:23,119 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:39:23,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:23,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:23,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:23,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:23,723 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:23,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:23,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1393812146, now seen corresponding path program 1 times [2021-11-12 23:39:23,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:23,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341892433] [2021-11-12 23:39:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:23,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:23,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:23,725 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:23,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:39:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:24,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:39:24,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 23:39:24,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 23:39:25,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:25,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341892433] [2021-11-12 23:39:25,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341892433] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:25,067 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:25,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 23:39:25,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759680620] [2021-11-12 23:39:25,067 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:25,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:39:25,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:25,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:39:25,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:39:25,069 INFO L87 Difference]: Start difference. First operand 3727 states and 5782 transitions. Second operand has 10 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-12 23:39:25,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:25,449 INFO L93 Difference]: Finished difference Result 7263 states and 11292 transitions. [2021-11-12 23:39:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:39:25,451 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 145 [2021-11-12 23:39:25,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:25,485 INFO L225 Difference]: With dead ends: 7263 [2021-11-12 23:39:25,486 INFO L226 Difference]: Without dead ends: 3569 [2021-11-12 23:39:25,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:39:25,500 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 78 mSDsluCounter, 5126 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 5986 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.06ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 157.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:25,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 5986 Invalid, 148 Unknown, 0 Unchecked, 6.06ms Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 157.43ms Time] [2021-11-12 23:39:25,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3569 states. [2021-11-12 23:39:25,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3569 to 3554. [2021-11-12 23:39:25,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3554 states, 2700 states have (on average 1.5137037037037038) internal successors, (4087), 2764 states have internal predecessors, (4087), 614 states have call successors, (614), 204 states have call predecessors, (614), 239 states have return successors, (814), 614 states have call predecessors, (814), 604 states have call successors, (814) [2021-11-12 23:39:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 5515 transitions. [2021-11-12 23:39:25,747 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 5515 transitions. Word has length 145 [2021-11-12 23:39:25,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:25,748 INFO L470 AbstractCegarLoop]: Abstraction has 3554 states and 5515 transitions. [2021-11-12 23:39:25,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-12 23:39:25,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 5515 transitions. [2021-11-12 23:39:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 23:39:25,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:25,755 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:39:25,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:25,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:25,970 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:25,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:25,970 INFO L85 PathProgramCache]: Analyzing trace with hash -720807921, now seen corresponding path program 1 times [2021-11-12 23:39:25,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:25,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379722120] [2021-11-12 23:39:25,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:25,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:25,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:25,972 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:25,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:39:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:26,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:39:26,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:39:26,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 23:39:27,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:27,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379722120] [2021-11-12 23:39:27,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379722120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:39:27,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [154907527] [2021-11-12 23:39:27,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:27,571 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:27,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:39:27,572 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:39:27,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 23:39:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:27,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:39:27,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:39:28,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 23:39:28,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [154907527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:39:28,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790214111] [2021-11-12 23:39:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:28,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:39:28,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:39:28,944 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:39:28,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-12 23:39:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:29,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:39:29,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:39:29,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 23:39:30,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790214111] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:39:30,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:39:30,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-12 23:39:30,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740647535] [2021-11-12 23:39:30,311 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:39:30,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:39:30,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:30,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:39:30,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:39:30,313 INFO L87 Difference]: Start difference. First operand 3554 states and 5515 transitions. Second operand has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 12 states have internal predecessors, (157), 8 states have call successors, (33), 6 states have call predecessors, (33), 10 states have return successors, (33), 10 states have call predecessors, (33), 8 states have call successors, (33) [2021-11-12 23:39:32,335 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:34,342 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:36,348 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:38,354 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:40,360 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:42,364 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:44,369 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:52,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:52,924 INFO L93 Difference]: Finished difference Result 9045 states and 14313 transitions. [2021-11-12 23:39:52,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:39:52,925 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 12 states have internal predecessors, (157), 8 states have call successors, (33), 6 states have call predecessors, (33), 10 states have return successors, (33), 10 states have call predecessors, (33), 8 states have call successors, (33) Word has length 150 [2021-11-12 23:39:52,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:52,966 INFO L225 Difference]: With dead ends: 9045 [2021-11-12 23:39:52,967 INFO L226 Difference]: Without dead ends: 5531 [2021-11-12 23:39:52,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 885 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:39:52,983 INFO L933 BasicCegarLoop]: 1614 mSDtfsCounter, 4725 mSDsluCounter, 3470 mSDsCounter, 0 mSdLazyCounter, 7469 mSolverCounterSat, 1543 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21062.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4802 SdHoareTripleChecker+Valid, 5084 SdHoareTripleChecker+Invalid, 9019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.51ms SdHoareTripleChecker+Time, 1543 IncrementalHoareTripleChecker+Valid, 7469 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22123.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:52,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4802 Valid, 5084 Invalid, 9019 Unknown, 0 Unchecked, 39.51ms Time], IncrementalHoareTripleChecker [1543 Valid, 7469 Invalid, 7 Unknown, 0 Unchecked, 22123.61ms Time] [2021-11-12 23:39:52,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5531 states. [2021-11-12 23:39:53,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5531 to 5324. [2021-11-12 23:39:53,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5324 states, 4028 states have (on average 1.513157894736842) internal successors, (6095), 4122 states have internal predecessors, (6095), 933 states have call successors, (933), 297 states have call predecessors, (933), 362 states have return successors, (1258), 950 states have call predecessors, (1258), 918 states have call successors, (1258) [2021-11-12 23:39:53,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5324 states to 5324 states and 8286 transitions. [2021-11-12 23:39:53,390 INFO L78 Accepts]: Start accepts. Automaton has 5324 states and 8286 transitions. Word has length 150 [2021-11-12 23:39:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:53,390 INFO L470 AbstractCegarLoop]: Abstraction has 5324 states and 8286 transitions. [2021-11-12 23:39:53,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 12 states have internal predecessors, (157), 8 states have call successors, (33), 6 states have call predecessors, (33), 10 states have return successors, (33), 10 states have call predecessors, (33), 8 states have call successors, (33) [2021-11-12 23:39:53,391 INFO L276 IsEmpty]: Start isEmpty. Operand 5324 states and 8286 transitions. [2021-11-12 23:39:53,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 23:39:53,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:53,397 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:39:53,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:53,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:53,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:54,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:54,018 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:54,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:54,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1008150526, now seen corresponding path program 1 times [2021-11-12 23:39:54,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:54,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693614864] [2021-11-12 23:39:54,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:54,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:54,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:54,020 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:54,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:39:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:54,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:39:54,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:54,859 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 41 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:39:54,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 23:39:55,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:55,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693614864] [2021-11-12 23:39:55,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693614864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:39:55,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1582119049] [2021-11-12 23:39:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:55,409 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:55,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:39:55,410 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:39:55,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 23:39:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:55,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:39:55,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 41 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:39:56,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 23:39:56,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1582119049] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:39:56,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101584686] [2021-11-12 23:39:56,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:56,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:39:56,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:39:56,747 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:39:56,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-12 23:39:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:57,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:39:57,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 41 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:39:57,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 23:39:57,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101584686] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:39:57,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:39:57,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-12 23:39:57,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046587232] [2021-11-12 23:39:57,802 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:39:57,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:39:57,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:57,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:39:57,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:39:57,803 INFO L87 Difference]: Start difference. First operand 5324 states and 8286 transitions. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 6 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (27), 7 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-12 23:39:59,834 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:01,840 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:09,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:09,436 INFO L93 Difference]: Finished difference Result 21303 states and 34295 transitions. [2021-11-12 23:40:09,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:40:09,438 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 6 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (27), 7 states have call predecessors, (27), 6 states have call successors, (27) Word has length 151 [2021-11-12 23:40:09,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:09,554 INFO L225 Difference]: With dead ends: 21303 [2021-11-12 23:40:09,554 INFO L226 Difference]: Without dead ends: 16007 [2021-11-12 23:40:09,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 921 GetRequests, 900 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:40:09,592 INFO L933 BasicCegarLoop]: 1436 mSDtfsCounter, 6219 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 4251 mSolverCounterSat, 2004 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9715.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6323 SdHoareTripleChecker+Valid, 2694 SdHoareTripleChecker+Invalid, 6257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.04ms SdHoareTripleChecker+Time, 2004 IncrementalHoareTripleChecker+Valid, 4251 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10623.41ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:09,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6323 Valid, 2694 Invalid, 6257 Unknown, 0 Unchecked, 36.04ms Time], IncrementalHoareTripleChecker [2004 Valid, 4251 Invalid, 2 Unknown, 0 Unchecked, 10623.41ms Time] [2021-11-12 23:40:09,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16007 states. [2021-11-12 23:40:10,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16007 to 14425. [2021-11-12 23:40:10,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14425 states, 10890 states have (on average 1.502020202020202) internal successors, (16357), 11155 states have internal predecessors, (16357), 2528 states have call successors, (2528), 864 states have call predecessors, (2528), 1006 states have return successors, (3638), 2543 states have call predecessors, (3638), 2492 states have call successors, (3638) [2021-11-12 23:40:10,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14425 states to 14425 states and 22523 transitions. [2021-11-12 23:40:10,777 INFO L78 Accepts]: Start accepts. Automaton has 14425 states and 22523 transitions. Word has length 151 [2021-11-12 23:40:10,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:10,778 INFO L470 AbstractCegarLoop]: Abstraction has 14425 states and 22523 transitions. [2021-11-12 23:40:10,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 6 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (27), 7 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-12 23:40:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 14425 states and 22523 transitions. [2021-11-12 23:40:10,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-12 23:40:10,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:10,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:10,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:11,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:11,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:11,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:11,406 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:11,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:11,407 INFO L85 PathProgramCache]: Analyzing trace with hash 228765637, now seen corresponding path program 1 times [2021-11-12 23:40:11,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:11,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515408747] [2021-11-12 23:40:11,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:11,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:11,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:11,409 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:11,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:40:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:11,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:40:11,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:40:13,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 23:40:17,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:17,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515408747] [2021-11-12 23:40:17,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515408747] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:17,313 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:17,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-12 23:40:17,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127019969] [2021-11-12 23:40:17,314 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:17,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:40:17,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:17,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:40:17,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:40:17,315 INFO L87 Difference]: Start difference. First operand 14425 states and 22523 transitions. Second operand has 13 states, 13 states have (on average 14.692307692307692) internal successors, (191), 13 states have internal predecessors, (191), 11 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2021-11-12 23:40:19,356 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:21,363 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:23,368 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:37,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:37,791 INFO L93 Difference]: Finished difference Result 43852 states and 70729 transitions. [2021-11-12 23:40:37,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:40:37,792 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.692307692307692) internal successors, (191), 13 states have internal predecessors, (191), 11 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) Word has length 153 [2021-11-12 23:40:37,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:38,004 INFO L225 Difference]: With dead ends: 43852 [2021-11-12 23:40:38,005 INFO L226 Difference]: Without dead ends: 29443 [2021-11-12 23:40:38,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:40:38,237 INFO L933 BasicCegarLoop]: 1613 mSDtfsCounter, 7591 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 6358 mSolverCounterSat, 2241 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16133.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7793 SdHoareTripleChecker+Valid, 3809 SdHoareTripleChecker+Invalid, 8602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 53.06ms SdHoareTripleChecker+Time, 2241 IncrementalHoareTripleChecker+Valid, 6358 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17679.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:38,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7793 Valid, 3809 Invalid, 8602 Unknown, 0 Unchecked, 53.06ms Time], IncrementalHoareTripleChecker [2241 Valid, 6358 Invalid, 3 Unknown, 0 Unchecked, 17679.05ms Time] [2021-11-12 23:40:38,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29443 states. [2021-11-12 23:40:39,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29443 to 24937. [2021-11-12 23:40:39,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24937 states, 18485 states have (on average 1.4806599945902084) internal successors, (27370), 18991 states have internal predecessors, (27370), 4726 states have call successors, (4726), 1499 states have call predecessors, (4726), 1725 states have return successors, (6791), 4704 states have call predecessors, (6791), 4672 states have call successors, (6791) [2021-11-12 23:40:40,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24937 states to 24937 states and 38887 transitions. [2021-11-12 23:40:40,186 INFO L78 Accepts]: Start accepts. Automaton has 24937 states and 38887 transitions. Word has length 153 [2021-11-12 23:40:40,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:40,187 INFO L470 AbstractCegarLoop]: Abstraction has 24937 states and 38887 transitions. [2021-11-12 23:40:40,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.692307692307692) internal successors, (191), 13 states have internal predecessors, (191), 11 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2021-11-12 23:40:40,187 INFO L276 IsEmpty]: Start isEmpty. Operand 24937 states and 38887 transitions. [2021-11-12 23:40:40,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-12 23:40:40,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:40,194 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:40,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:40,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:40,414 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:40,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:40,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2125578942, now seen corresponding path program 1 times [2021-11-12 23:40:40,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:40,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510260009] [2021-11-12 23:40:40,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:40,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:40,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:40,418 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:40,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:40:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:40,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:40:40,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:40:41,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-12 23:40:42,016 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:42,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510260009] [2021-11-12 23:40:42,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510260009] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:42,016 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:42,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-12 23:40:42,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171625172] [2021-11-12 23:40:42,017 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:42,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:40:42,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:42,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:40:42,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:40:42,018 INFO L87 Difference]: Start difference. First operand 24937 states and 38887 transitions. Second operand has 14 states, 14 states have (on average 12.071428571428571) internal successors, (169), 12 states have internal predecessors, (169), 8 states have call successors, (34), 6 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 8 states have call successors, (34) [2021-11-12 23:40:44,038 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:46,044 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:48,050 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:02,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:02,043 INFO L93 Difference]: Finished difference Result 82306 states and 137314 transitions. [2021-11-12 23:41:02,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 23:41:02,045 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.071428571428571) internal successors, (169), 12 states have internal predecessors, (169), 8 states have call successors, (34), 6 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 8 states have call successors, (34) Word has length 157 [2021-11-12 23:41:02,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:02,740 INFO L225 Difference]: With dead ends: 82306 [2021-11-12 23:41:02,741 INFO L226 Difference]: Without dead ends: 57193 [2021-11-12 23:41:02,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:41:02,953 INFO L933 BasicCegarLoop]: 1752 mSDtfsCounter, 3099 mSDsluCounter, 2650 mSDsCounter, 0 mSdLazyCounter, 7814 mSolverCounterSat, 1244 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14767.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3208 SdHoareTripleChecker+Valid, 4402 SdHoareTripleChecker+Invalid, 9061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 49.77ms SdHoareTripleChecker+Time, 1244 IncrementalHoareTripleChecker+Valid, 7814 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15991.48ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:02,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3208 Valid, 4402 Invalid, 9061 Unknown, 0 Unchecked, 49.77ms Time], IncrementalHoareTripleChecker [1244 Valid, 7814 Invalid, 3 Unknown, 0 Unchecked, 15991.48ms Time] [2021-11-12 23:41:03,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57193 states. [2021-11-12 23:41:06,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57193 to 49102. [2021-11-12 23:41:06,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49102 states, 34992 states have (on average 1.463991769547325) internal successors, (51228), 36470 states have internal predecessors, (51228), 10834 states have call successors, (10834), 2494 states have call predecessors, (10834), 3275 states have return successors, (16642), 11061 states have call predecessors, (16642), 10741 states have call successors, (16642) [2021-11-12 23:41:07,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49102 states to 49102 states and 78704 transitions. [2021-11-12 23:41:07,047 INFO L78 Accepts]: Start accepts. Automaton has 49102 states and 78704 transitions. Word has length 157 [2021-11-12 23:41:07,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:07,048 INFO L470 AbstractCegarLoop]: Abstraction has 49102 states and 78704 transitions. [2021-11-12 23:41:07,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.071428571428571) internal successors, (169), 12 states have internal predecessors, (169), 8 states have call successors, (34), 6 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 8 states have call successors, (34) [2021-11-12 23:41:07,048 INFO L276 IsEmpty]: Start isEmpty. Operand 49102 states and 78704 transitions. [2021-11-12 23:41:07,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-12 23:41:07,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:07,061 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:07,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:07,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:07,277 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:07,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:07,278 INFO L85 PathProgramCache]: Analyzing trace with hash -391474492, now seen corresponding path program 1 times [2021-11-12 23:41:07,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:07,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739206659] [2021-11-12 23:41:07,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:07,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:07,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:07,283 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:07,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:41:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:07,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:41:07,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 23:41:08,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:41:08,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:08,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739206659] [2021-11-12 23:41:08,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739206659] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:41:08,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:41:08,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 18 [2021-11-12 23:41:08,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406139094] [2021-11-12 23:41:08,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:08,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:41:08,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:08,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:41:08,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:41:08,966 INFO L87 Difference]: Start difference. First operand 49102 states and 78704 transitions. Second operand has 11 states, 11 states have (on average 10.0) internal successors, (110), 9 states have internal predecessors, (110), 6 states have call successors, (19), 5 states have call predecessors, (19), 8 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-12 23:41:10,985 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:12,991 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:14,997 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:17,003 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:19,009 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:21,014 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:23,019 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:25,024 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:38,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:38,547 INFO L93 Difference]: Finished difference Result 87519 states and 141058 transitions. [2021-11-12 23:41:38,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:41:38,548 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.0) internal successors, (110), 9 states have internal predecessors, (110), 6 states have call successors, (19), 5 states have call predecessors, (19), 8 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 157 [2021-11-12 23:41:38,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:39,160 INFO L225 Difference]: With dead ends: 87519 [2021-11-12 23:41:39,160 INFO L226 Difference]: Without dead ends: 50186 [2021-11-12 23:41:39,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-11-12 23:41:39,578 INFO L933 BasicCegarLoop]: 1497 mSDtfsCounter, 2081 mSDsluCounter, 3409 mSDsCounter, 0 mSdLazyCounter, 8316 mSolverCounterSat, 552 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24183.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2200 SdHoareTripleChecker+Valid, 4906 SdHoareTripleChecker+Invalid, 8876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.86ms SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 8316 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25339.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:39,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2200 Valid, 4906 Invalid, 8876 Unknown, 0 Unchecked, 43.86ms Time], IncrementalHoareTripleChecker [552 Valid, 8316 Invalid, 8 Unknown, 0 Unchecked, 25339.50ms Time] [2021-11-12 23:41:39,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50186 states. [2021-11-12 23:41:43,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50186 to 49145. [2021-11-12 23:41:43,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49145 states, 35033 states have (on average 1.4625924128678673) internal successors, (51239), 36511 states have internal predecessors, (51239), 10818 states have call successors, (10818), 2484 states have call predecessors, (10818), 3293 states have return successors, (16675), 11073 states have call predecessors, (16675), 10725 states have call successors, (16675) [2021-11-12 23:41:43,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49145 states to 49145 states and 78732 transitions. [2021-11-12 23:41:44,000 INFO L78 Accepts]: Start accepts. Automaton has 49145 states and 78732 transitions. Word has length 157 [2021-11-12 23:41:44,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:44,003 INFO L470 AbstractCegarLoop]: Abstraction has 49145 states and 78732 transitions. [2021-11-12 23:41:44,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.0) internal successors, (110), 9 states have internal predecessors, (110), 6 states have call successors, (19), 5 states have call predecessors, (19), 8 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-12 23:41:44,003 INFO L276 IsEmpty]: Start isEmpty. Operand 49145 states and 78732 transitions. [2021-11-12 23:41:44,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-12 23:41:44,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:44,011 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:44,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:44,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:44,232 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:44,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:44,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2066128348, now seen corresponding path program 1 times [2021-11-12 23:41:44,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:44,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74824222] [2021-11-12 23:41:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:44,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:44,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:44,234 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:44,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:41:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:44,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:41:44,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:41:45,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 23:41:45,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:45,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74824222] [2021-11-12 23:41:45,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74824222] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:45,666 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:45,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 23:41:45,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116764046] [2021-11-12 23:41:45,667 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:45,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:41:45,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:45,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:41:45,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:41:45,669 INFO L87 Difference]: Start difference. First operand 49145 states and 78732 transitions. Second operand has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) [2021-11-12 23:41:47,694 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:49,701 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:07,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:07,624 INFO L93 Difference]: Finished difference Result 178132 states and 306096 transitions. [2021-11-12 23:42:07,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:42:07,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) Word has length 164 [2021-11-12 23:42:07,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:09,237 INFO L225 Difference]: With dead ends: 178132 [2021-11-12 23:42:09,237 INFO L226 Difference]: Without dead ends: 129430 [2021-11-12 23:42:09,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:42:09,873 INFO L933 BasicCegarLoop]: 1756 mSDtfsCounter, 4191 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 2960 mSolverCounterSat, 1416 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8928.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4301 SdHoareTripleChecker+Valid, 2873 SdHoareTripleChecker+Invalid, 4378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.96ms SdHoareTripleChecker+Time, 1416 IncrementalHoareTripleChecker+Valid, 2960 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9680.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:09,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4301 Valid, 2873 Invalid, 4378 Unknown, 0 Unchecked, 30.96ms Time], IncrementalHoareTripleChecker [1416 Valid, 2960 Invalid, 2 Unknown, 0 Unchecked, 9680.23ms Time] [2021-11-12 23:42:10,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129430 states. [2021-11-12 23:42:19,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129430 to 112012. [2021-11-12 23:42:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112012 states, 76047 states have (on average 1.4450274172551185) internal successors, (109890), 80402 states have internal predecessors, (109890), 28958 states have call successors, (28958), 4508 states have call predecessors, (28958), 7006 states have return successors, (47246), 30227 states have call predecessors, (47246), 28787 states have call successors, (47246) [2021-11-12 23:42:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112012 states to 112012 states and 186094 transitions. [2021-11-12 23:42:21,908 INFO L78 Accepts]: Start accepts. Automaton has 112012 states and 186094 transitions. Word has length 164 [2021-11-12 23:42:21,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:21,908 INFO L470 AbstractCegarLoop]: Abstraction has 112012 states and 186094 transitions. [2021-11-12 23:42:21,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) [2021-11-12 23:42:21,908 INFO L276 IsEmpty]: Start isEmpty. Operand 112012 states and 186094 transitions. [2021-11-12 23:42:21,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 23:42:21,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:21,915 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:21,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:22,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:22,130 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:22,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:22,130 INFO L85 PathProgramCache]: Analyzing trace with hash -85315147, now seen corresponding path program 1 times [2021-11-12 23:42:22,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:22,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952349179] [2021-11-12 23:42:22,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:22,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:22,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:22,132 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:22,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fed02c3-0cbe-4a5f-a380-a1080f039d78/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:42:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:22,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:42:22,598 INFO L286 TraceCheckSpWp]: Computing forward predicates...