./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.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_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/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_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/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_2e40845f-acd7-4e47-aeed-0b9434454a61/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 62c2cf132c1af8470eae7f9b6621445fd5b91c1643db1f71bf7213022a4dec0a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:38:38,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:38:38,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:38:38,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:38:38,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:38:38,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:38:38,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:38:38,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:38:38,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:38:38,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:38:38,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:38:38,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:38:38,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:38:38,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:38:38,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:38:38,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:38:38,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:38:38,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:38:38,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:38:38,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:38:38,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:38:38,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:38:38,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:38:38,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:38:38,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:38:38,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:38:38,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:38:38,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:38:38,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:38:38,653 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:38:38,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:38:38,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:38:38,655 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:38:38,657 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:38:38,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:38:38,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:38:38,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:38:38,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:38:38,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:38:38,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:38:38,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:38:38,664 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:38:38,696 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:38:38,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:38:38,697 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:38:38,698 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:38:38,698 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:38:38,698 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:38:38,698 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:38:38,699 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:38:38,699 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:38:38,699 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:38:38,700 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:38:38,700 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:38:38,700 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:38:38,701 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:38:38,701 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:38:38,701 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:38:38,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:38:38,702 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:38:38,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:38:38,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:38:38,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:38:38,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:38:38,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:38:38,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:38:38,704 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:38:38,705 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:38:38,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:38:38,705 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:38:38,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:38:38,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:38:38,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:38:38,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:38:38,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:38:38,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:38:38,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:38:38,708 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:38:38,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:38:38,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:38:38,708 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:38:38,709 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:38:38,709 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_2e40845f-acd7-4e47-aeed-0b9434454a61/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62c2cf132c1af8470eae7f9b6621445fd5b91c1643db1f71bf7213022a4dec0a [2021-11-12 22:38:39,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:38:39,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:38:39,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:38:39,076 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:38:39,077 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:38:39,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2021-11-12 22:38:39,151 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/data/c016f0fcb/7005d6ee451044f5b4695f5e446eaa1f/FLAG64c085043 [2021-11-12 22:38:39,757 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:38:39,759 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2021-11-12 22:38:39,778 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/data/c016f0fcb/7005d6ee451044f5b4695f5e446eaa1f/FLAG64c085043 [2021-11-12 22:38:40,062 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/data/c016f0fcb/7005d6ee451044f5b4695f5e446eaa1f [2021-11-12 22:38:40,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:38:40,071 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:38:40,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:38:40,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:38:40,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:38:40,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:38:40" (1/1) ... [2021-11-12 22:38:40,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f5fcf14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:40, skipping insertion in model container [2021-11-12 22:38:40,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:38:40" (1/1) ... [2021-11-12 22:38:40,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:38:40,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:38:40,475 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_2e40845f-acd7-4e47-aeed-0b9434454a61/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2021-11-12 22:38:40,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:38:40,586 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 22:38:40,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@812738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:40, skipping insertion in model container [2021-11-12 22:38:40,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:38:40,588 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:38:40,590 INFO L158 Benchmark]: Toolchain (without parser) took 518.28ms. Allocated memory is still 98.6MB. Free memory was 55.8MB in the beginning and 70.2MB in the end (delta: -14.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-12 22:38:40,591 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 98.6MB. Free memory is still 73.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:38:40,592 INFO L158 Benchmark]: CACSL2BoogieTranslator took 512.07ms. Allocated memory is still 98.6MB. Free memory was 55.6MB in the beginning and 70.2MB in the end (delta: -14.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-12 22:38:40,595 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 98.6MB. Free memory is still 73.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 512.07ms. Allocated memory is still 98.6MB. Free memory was 55.6MB in the beginning and 70.2MB in the end (delta: -14.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 355]: 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_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/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_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/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_2e40845f-acd7-4e47-aeed-0b9434454a61/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 62c2cf132c1af8470eae7f9b6621445fd5b91c1643db1f71bf7213022a4dec0a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:38:43,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:38:43,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:38:43,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:38:43,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:38:43,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:38:43,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:38:43,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:38:43,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:38:43,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:38:43,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:38:43,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:38:43,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:38:43,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:38:43,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:38:43,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:38:43,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:38:43,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:38:43,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:38:43,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:38:43,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:38:43,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:38:43,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:38:43,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:38:43,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:38:43,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:38:43,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:38:43,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:38:43,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:38:43,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:38:43,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:38:43,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:38:43,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:38:43,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:38:43,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:38:43,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:38:43,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:38:43,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:38:43,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:38:43,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:38:43,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:38:43,423 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:38:43,480 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:38:43,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:38:43,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:38:43,482 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:38:43,482 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:38:43,483 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:38:43,483 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:38:43,483 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:38:43,484 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:38:43,484 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:38:43,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:38:43,487 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:38:43,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:38:43,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:38:43,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:38:43,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:38:43,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:38:43,489 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:38:43,489 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:38:43,490 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:38:43,490 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:38:43,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:38:43,490 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:38:43,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:38:43,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:38:43,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:38:43,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:38:43,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:38:43,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:38:43,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:38:43,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:38:43,493 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:38:43,493 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:38:43,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:38:43,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:38:43,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:38:43,495 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_2e40845f-acd7-4e47-aeed-0b9434454a61/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62c2cf132c1af8470eae7f9b6621445fd5b91c1643db1f71bf7213022a4dec0a [2021-11-12 22:38:43,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:38:44,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:38:44,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:38:44,017 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:38:44,018 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:38:44,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2021-11-12 22:38:44,105 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/data/34fb3ef4c/cf07dd85c5de49f58024257f5b9d593c/FLAGd2b68ecf6 [2021-11-12 22:38:44,827 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:38:44,828 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2021-11-12 22:38:44,865 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/data/34fb3ef4c/cf07dd85c5de49f58024257f5b9d593c/FLAGd2b68ecf6 [2021-11-12 22:38:45,049 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/data/34fb3ef4c/cf07dd85c5de49f58024257f5b9d593c [2021-11-12 22:38:45,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:38:45,057 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:38:45,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:38:45,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:38:45,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:38:45,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:38:45" (1/1) ... [2021-11-12 22:38:45,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f16f829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:45, skipping insertion in model container [2021-11-12 22:38:45,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:38:45" (1/1) ... [2021-11-12 22:38:45,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:38:45,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:38:45,527 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_2e40845f-acd7-4e47-aeed-0b9434454a61/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2021-11-12 22:38:45,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:38:45,654 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:38:45,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:38:45,707 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_2e40845f-acd7-4e47-aeed-0b9434454a61/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2021-11-12 22:38:45,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:38:45,832 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:38:45,883 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_2e40845f-acd7-4e47-aeed-0b9434454a61/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2021-11-12 22:38:45,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:38:46,017 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:38:46,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:46 WrapperNode [2021-11-12 22:38:46,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:38:46,020 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:38:46,020 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:38:46,020 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:38:46,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:46" (1/1) ... [2021-11-12 22:38:46,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:46" (1/1) ... [2021-11-12 22:38:46,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:38:46,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:38:46,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:38:46,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:38:46,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:46" (1/1) ... [2021-11-12 22:38:46,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:46" (1/1) ... [2021-11-12 22:38:46,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:46" (1/1) ... [2021-11-12 22:38:46,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:46" (1/1) ... [2021-11-12 22:38:46,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:46" (1/1) ... [2021-11-12 22:38:46,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:46" (1/1) ... [2021-11-12 22:38:46,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:46" (1/1) ... [2021-11-12 22:38:46,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:38:46,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:38:46,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:38:46,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:38:46,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:46" (1/1) ... [2021-11-12 22:38:46,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:38:46,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:38:46,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:38:46,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:38:46,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:38:46,325 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__before__methaneQuery [2021-11-12 22:38:46,325 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__before__methaneQuery [2021-11-12 22:38:46,325 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:38:46,325 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:38:46,326 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:38:46,326 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:38:46,326 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__highWaterSensor [2021-11-12 22:38:46,326 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__highWaterSensor [2021-11-12 22:38:46,327 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2021-11-12 22:38:46,327 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2021-11-12 22:38:46,327 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__methaneAlarm [2021-11-12 22:38:46,327 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__methaneAlarm [2021-11-12 22:38:46,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:38:46,328 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2021-11-12 22:38:46,328 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2021-11-12 22:38:46,328 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__lowWaterSensor [2021-11-12 22:38:46,328 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__lowWaterSensor [2021-11-12 22:38:46,329 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2021-11-12 22:38:46,329 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2021-11-12 22:38:46,329 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2021-11-12 22:38:46,329 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2021-11-12 22:38:46,329 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2021-11-12 22:38:46,330 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2021-11-12 22:38:46,330 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2021-11-12 22:38:46,330 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2021-11-12 22:38:46,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:38:46,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:38:49,011 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:38:49,012 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 22:38:49,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:38:49 BoogieIcfgContainer [2021-11-12 22:38:49,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:38:49,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:38:49,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:38:49,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:38:49,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:38:45" (1/3) ... [2021-11-12 22:38:49,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463400fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:38:49, skipping insertion in model container [2021-11-12 22:38:49,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:46" (2/3) ... [2021-11-12 22:38:49,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463400fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:38:49, skipping insertion in model container [2021-11-12 22:38:49,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:38:49" (3/3) ... [2021-11-12 22:38:49,026 INFO L111 eAbstractionObserver]: Analyzing ICFG minepump_spec5_productSimulator.cil.c [2021-11-12 22:38:49,035 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:38:49,036 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:38:49,118 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:38:49,132 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 22:38:49,133 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:38:49,161 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 104 states have (on average 1.3557692307692308) internal successors, (141), 120 states have internal predecessors, (141), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-12 22:38:49,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 22:38:49,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:49,175 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-12 22:38:49,176 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:49,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:49,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1460925416, now seen corresponding path program 1 times [2021-11-12 22:38:49,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:49,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438686000] [2021-11-12 22:38:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:49,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:49,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:49,202 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:49,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:38:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:49,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:38:49,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:38:49,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:38:49,983 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:38:49,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438686000] [2021-11-12 22:38:49,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438686000] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:49,985 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:49,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:38:49,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896183410] [2021-11-12 22:38:49,988 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:49,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:38:49,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:50,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:38:50,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:38:50,042 INFO L87 Difference]: Start difference. First operand has 148 states, 104 states have (on average 1.3557692307692308) internal successors, (141), 120 states have internal predecessors, (141), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:38:50,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:50,101 INFO L93 Difference]: Finished difference Result 272 states and 376 transitions. [2021-11-12 22:38:50,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:38:50,103 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 62 [2021-11-12 22:38:50,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:50,117 INFO L225 Difference]: With dead ends: 272 [2021-11-12 22:38:50,117 INFO L226 Difference]: Without dead ends: 139 [2021-11-12 22:38:50,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:38:50,128 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.02ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:50,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 4.02ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:38:50,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-12 22:38:50,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-11-12 22:38:50,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 97 states have (on average 1.309278350515464) internal successors, (127), 112 states have internal predecessors, (127), 30 states have call successors, (30), 12 states have call predecessors, (30), 11 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-12 22:38:50,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 186 transitions. [2021-11-12 22:38:50,186 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 186 transitions. Word has length 62 [2021-11-12 22:38:50,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:50,188 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 186 transitions. [2021-11-12 22:38:50,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:38:50,188 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 186 transitions. [2021-11-12 22:38:50,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-12 22:38:50,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:50,194 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-12 22:38:50,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:38:50,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:38:50,399 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:50,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:50,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1003270502, now seen corresponding path program 1 times [2021-11-12 22:38:50,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:50,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118511006] [2021-11-12 22:38:50,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:50,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:50,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:50,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:50,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:38:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:50,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:38:50,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:38:50,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:38:51,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:38:51,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2118511006] [2021-11-12 22:38:51,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2118511006] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:51,083 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:51,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:38:51,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232469253] [2021-11-12 22:38:51,084 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:51,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:38:51,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:51,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:38:51,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:38:51,088 INFO L87 Difference]: Start difference. First operand 139 states and 186 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:38:51,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:51,133 INFO L93 Difference]: Finished difference Result 221 states and 296 transitions. [2021-11-12 22:38:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:38:51,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 63 [2021-11-12 22:38:51,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:51,137 INFO L225 Difference]: With dead ends: 221 [2021-11-12 22:38:51,138 INFO L226 Difference]: Without dead ends: 130 [2021-11-12 22:38:51,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 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 22:38:51,142 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 42 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.65ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.18ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:51,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 320 Invalid, 5 Unknown, 0 Unchecked, 4.65ms Time], IncrementalHoareTripleChecker [4 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 10.18ms Time] [2021-11-12 22:38:51,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-12 22:38:51,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-12 22:38:51,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 91 states have (on average 1.3186813186813187) internal successors, (120), 106 states have internal predecessors, (120), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (27), 22 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-12 22:38:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 174 transitions. [2021-11-12 22:38:51,178 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 174 transitions. Word has length 63 [2021-11-12 22:38:51,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:51,179 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 174 transitions. [2021-11-12 22:38:51,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:38:51,180 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 174 transitions. [2021-11-12 22:38:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 22:38:51,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:51,185 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-12 22:38:51,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:38:51,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:38:51,395 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:51,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:51,399 INFO L85 PathProgramCache]: Analyzing trace with hash 742899427, now seen corresponding path program 1 times [2021-11-12 22:38:51,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:51,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670436934] [2021-11-12 22:38:51,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:51,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:51,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:51,404 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:51,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:38:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:51,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:38:51,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 22:38:51,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:38:52,240 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:38:52,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670436934] [2021-11-12 22:38:52,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670436934] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:52,245 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:52,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-12 22:38:52,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728403581] [2021-11-12 22:38:52,246 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:52,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:38:52,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:52,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:38:52,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:38:52,251 INFO L87 Difference]: Start difference. First operand 130 states and 174 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 22:38:52,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:52,469 INFO L93 Difference]: Finished difference Result 391 states and 531 transitions. [2021-11-12 22:38:52,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:38:52,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 68 [2021-11-12 22:38:52,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:52,488 INFO L225 Difference]: With dead ends: 391 [2021-11-12 22:38:52,491 INFO L226 Difference]: Without dead ends: 284 [2021-11-12 22:38:52,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 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 22:38:52,503 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 254 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.54ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 146.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:52,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 427 Invalid, 60 Unknown, 0 Unchecked, 10.54ms Time], IncrementalHoareTripleChecker [10 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 146.01ms Time] [2021-11-12 22:38:52,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-12 22:38:52,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 278. [2021-11-12 22:38:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 197 states have (on average 1.3604060913705585) internal successors, (268), 229 states have internal predecessors, (268), 54 states have call successors, (54), 26 states have call predecessors, (54), 26 states have return successors, (55), 42 states have call predecessors, (55), 54 states have call successors, (55) [2021-11-12 22:38:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 377 transitions. [2021-11-12 22:38:52,563 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 377 transitions. Word has length 68 [2021-11-12 22:38:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:52,564 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 377 transitions. [2021-11-12 22:38:52,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 22:38:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 377 transitions. [2021-11-12 22:38:52,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 22:38:52,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:52,570 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-12 22:38:52,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:38:52,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:38:52,790 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:52,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:52,791 INFO L85 PathProgramCache]: Analyzing trace with hash 999872991, now seen corresponding path program 1 times [2021-11-12 22:38:52,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:52,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966170111] [2021-11-12 22:38:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:52,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:52,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:52,794 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:52,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:38:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:53,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:38:53,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 22:38:53,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 22:38:53,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:38:53,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966170111] [2021-11-12 22:38:53,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966170111] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:53,761 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:53,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 7 [2021-11-12 22:38:53,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764491051] [2021-11-12 22:38:53,762 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:53,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:38:53,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:53,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:38:53,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:38:53,764 INFO L87 Difference]: Start difference. First operand 278 states and 377 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 1 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-12 22:38:55,450 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:38:55,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:55,911 INFO L93 Difference]: Finished difference Result 738 states and 1031 transitions. [2021-11-12 22:38:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:38:55,912 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 1 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 72 [2021-11-12 22:38:55,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:55,919 INFO L225 Difference]: With dead ends: 738 [2021-11-12 22:38:55,919 INFO L226 Difference]: Without dead ends: 483 [2021-11-12 22:38:55,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:38:55,923 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 134 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1928.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.11ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1995.60ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:55,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 863 Invalid, 176 Unknown, 0 Unchecked, 10.11ms Time], IncrementalHoareTripleChecker [25 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 1995.60ms Time] [2021-11-12 22:38:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-11-12 22:38:55,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 452. [2021-11-12 22:38:55,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 329 states have (on average 1.297872340425532) internal successors, (427), 366 states have internal predecessors, (427), 75 states have call successors, (75), 41 states have call predecessors, (75), 47 states have return successors, (107), 72 states have call predecessors, (107), 75 states have call successors, (107) [2021-11-12 22:38:56,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 609 transitions. [2021-11-12 22:38:56,003 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 609 transitions. Word has length 72 [2021-11-12 22:38:56,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:56,004 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 609 transitions. [2021-11-12 22:38:56,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 1 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-12 22:38:56,005 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 609 transitions. [2021-11-12 22:38:56,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 22:38:56,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:56,010 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:38:56,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-12 22:38:56,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:38:56,231 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:56,232 INFO L85 PathProgramCache]: Analyzing trace with hash 997919659, now seen corresponding path program 1 times [2021-11-12 22:38:56,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:56,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978333003] [2021-11-12 22:38:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:56,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:56,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:56,234 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:56,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:38:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:56,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:38:56,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 22:38:56,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:38:57,197 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:38:57,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978333003] [2021-11-12 22:38:57,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978333003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:57,197 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:57,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 5 [2021-11-12 22:38:57,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966096845] [2021-11-12 22:38:57,198 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:57,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:38:57,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:57,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:38:57,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:38:57,200 INFO L87 Difference]: Start difference. First operand 452 states and 609 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 5 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-12 22:38:58,610 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:38:59,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:59,193 INFO L93 Difference]: Finished difference Result 1892 states and 2786 transitions. [2021-11-12 22:38:59,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:38:59,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 5 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 5 states have call successors, (22) Word has length 92 [2021-11-12 22:38:59,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:59,211 INFO L225 Difference]: With dead ends: 1892 [2021-11-12 22:38:59,212 INFO L226 Difference]: Without dead ends: 1463 [2021-11-12 22:38:59,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:38:59,218 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 400 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1734.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.86ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1820.21ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:59,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 675 Invalid, 242 Unknown, 0 Unchecked, 9.86ms Time], IncrementalHoareTripleChecker [46 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 1820.21ms Time] [2021-11-12 22:38:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-11-12 22:38:59,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1443. [2021-11-12 22:38:59,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1067 states have (on average 1.2877225866916588) internal successors, (1374), 1164 states have internal predecessors, (1374), 226 states have call successors, (226), 139 states have call predecessors, (226), 149 states have return successors, (426), 228 states have call predecessors, (426), 226 states have call successors, (426) [2021-11-12 22:38:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 2026 transitions. [2021-11-12 22:38:59,422 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 2026 transitions. Word has length 92 [2021-11-12 22:38:59,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:59,423 INFO L470 AbstractCegarLoop]: Abstraction has 1443 states and 2026 transitions. [2021-11-12 22:38:59,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 5 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-12 22:38:59,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 2026 transitions. [2021-11-12 22:38:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 22:38:59,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:59,429 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:38:59,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:38:59,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:38:59,644 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:59,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:59,645 INFO L85 PathProgramCache]: Analyzing trace with hash -388283735, now seen corresponding path program 1 times [2021-11-12 22:38:59,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:59,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479910383] [2021-11-12 22:38:59,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:59,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:59,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:59,650 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:59,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:38:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:59,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:38:59,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 22:39:00,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:39:00,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:00,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479910383] [2021-11-12 22:39:00,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479910383] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:00,372 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:00,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 22:39:00,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091039336] [2021-11-12 22:39:00,373 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:00,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:39:00,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:00,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:39:00,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:39:00,375 INFO L87 Difference]: Start difference. First operand 1443 states and 2026 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:39:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:00,577 INFO L93 Difference]: Finished difference Result 2923 states and 4370 transitions. [2021-11-12 22:39:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:39:00,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 92 [2021-11-12 22:39:00,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:00,599 INFO L225 Difference]: With dead ends: 2923 [2021-11-12 22:39:00,599 INFO L226 Difference]: Without dead ends: 1503 [2021-11-12 22:39:00,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:39:00,616 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 12 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.85ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:00,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 709 Invalid, 17 Unknown, 0 Unchecked, 5.85ms Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 19.07ms Time] [2021-11-12 22:39:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2021-11-12 22:39:00,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1461. [2021-11-12 22:39:00,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1085 states have (on average 1.2829493087557604) internal successors, (1392), 1182 states have internal predecessors, (1392), 226 states have call successors, (226), 139 states have call predecessors, (226), 149 states have return successors, (426), 228 states have call predecessors, (426), 226 states have call successors, (426) [2021-11-12 22:39:00,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 2044 transitions. [2021-11-12 22:39:00,797 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 2044 transitions. Word has length 92 [2021-11-12 22:39:00,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:00,797 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 2044 transitions. [2021-11-12 22:39:00,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:39:00,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 2044 transitions. [2021-11-12 22:39:00,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 22:39:00,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:00,805 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:00,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:01,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:01,019 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:01,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:01,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1534944299, now seen corresponding path program 1 times [2021-11-12 22:39:01,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:01,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189905554] [2021-11-12 22:39:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:01,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:01,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:01,022 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:01,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:39:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:01,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:39:01,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 22:39:01,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:39:01,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:01,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189905554] [2021-11-12 22:39:01,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189905554] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:01,774 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:01,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:39:01,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626673534] [2021-11-12 22:39:01,775 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:01,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:39:01,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:01,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:39:01,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:39:01,777 INFO L87 Difference]: Start difference. First operand 1461 states and 2044 transitions. 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:39:01,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:01,924 INFO L93 Difference]: Finished difference Result 2713 states and 3912 transitions. [2021-11-12 22:39:01,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:39:01,925 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 92 [2021-11-12 22:39:01,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:01,940 INFO L225 Difference]: With dead ends: 2713 [2021-11-12 22:39:01,940 INFO L226 Difference]: Without dead ends: 1275 [2021-11-12 22:39:01,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:39:01,952 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 25 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.39ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:01,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 707 Invalid, 17 Unknown, 0 Unchecked, 4.39ms Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 19.00ms Time] [2021-11-12 22:39:01,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-11-12 22:39:02,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1259. [2021-11-12 22:39:02,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 929 states have (on average 1.2820236813778256) internal successors, (1191), 1013 states have internal predecessors, (1191), 201 states have call successors, (201), 122 states have call predecessors, (201), 128 states have return successors, (338), 195 states have call predecessors, (338), 201 states have call successors, (338) [2021-11-12 22:39:02,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 1730 transitions. [2021-11-12 22:39:02,100 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 1730 transitions. Word has length 92 [2021-11-12 22:39:02,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:02,101 INFO L470 AbstractCegarLoop]: Abstraction has 1259 states and 1730 transitions. [2021-11-12 22:39:02,101 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:39:02,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 1730 transitions. [2021-11-12 22:39:02,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 22:39:02,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:02,109 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-12 22:39:02,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:02,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:02,324 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:02,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1664630151, now seen corresponding path program 1 times [2021-11-12 22:39:02,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:02,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467098324] [2021-11-12 22:39:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:02,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:02,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:02,327 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:02,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:39:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:02,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:39:02,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 22:39:02,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:39:03,421 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:03,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467098324] [2021-11-12 22:39:03,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467098324] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:03,422 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:03,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 8] imperfect sequences [] total 10 [2021-11-12 22:39:03,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465938414] [2021-11-12 22:39:03,422 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:03,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:39:03,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:03,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:39:03,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:39:03,424 INFO L87 Difference]: Start difference. First operand 1259 states and 1730 transitions. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 8 states have internal predecessors, (83), 4 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-12 22:39:05,009 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:06,676 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:08,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:10,159 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:12,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:12,249 INFO L93 Difference]: Finished difference Result 3939 states and 5515 transitions. [2021-11-12 22:39:12,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:39:12,250 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 8 states have internal predecessors, (83), 4 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 96 [2021-11-12 22:39:12,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:12,279 INFO L225 Difference]: With dead ends: 3939 [2021-11-12 22:39:12,279 INFO L226 Difference]: Without dead ends: 2871 [2021-11-12 22:39:12,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:39:12,289 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 515 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8066.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.89ms SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8323.37ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:12,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 1125 Invalid, 1432 Unknown, 0 Unchecked, 20.89ms Time], IncrementalHoareTripleChecker [226 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 8323.37ms Time] [2021-11-12 22:39:12,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-11-12 22:39:12,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2508. [2021-11-12 22:39:12,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 1841 states have (on average 1.2705051602390005) internal successors, (2339), 2012 states have internal predecessors, (2339), 385 states have call successors, (385), 252 states have call predecessors, (385), 281 states have return successors, (645), 400 states have call predecessors, (645), 385 states have call successors, (645) [2021-11-12 22:39:12,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 3369 transitions. [2021-11-12 22:39:12,574 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 3369 transitions. Word has length 96 [2021-11-12 22:39:12,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:12,574 INFO L470 AbstractCegarLoop]: Abstraction has 2508 states and 3369 transitions. [2021-11-12 22:39:12,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 8 states have internal predecessors, (83), 4 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-12 22:39:12,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 3369 transitions. [2021-11-12 22:39:12,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 22:39:12,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:12,581 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:12,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:12,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:12,802 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:12,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:12,803 INFO L85 PathProgramCache]: Analyzing trace with hash 534729444, now seen corresponding path program 1 times [2021-11-12 22:39:12,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:12,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519814277] [2021-11-12 22:39:12,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:12,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:12,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:12,805 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:12,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:39:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:13,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:39:13,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 22:39:13,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-12 22:39:13,888 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:13,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519814277] [2021-11-12 22:39:13,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519814277] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:39:13,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:39:13,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-12 22:39:13,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450664316] [2021-11-12 22:39:13,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:13,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:39:13,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:13,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:39:13,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:39:13,891 INFO L87 Difference]: Start difference. First operand 2508 states and 3369 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-12 22:39:15,621 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:15,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:15,859 INFO L93 Difference]: Finished difference Result 5124 states and 7064 transitions. [2021-11-12 22:39:15,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:39:15,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 136 [2021-11-12 22:39:15,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:15,886 INFO L225 Difference]: With dead ends: 5124 [2021-11-12 22:39:15,887 INFO L226 Difference]: Without dead ends: 2639 [2021-11-12 22:39:15,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:39:15,903 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 94 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1733.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.74ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1742.62ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:15,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 352 Invalid, 4 Unknown, 0 Unchecked, 1.74ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 1742.62ms Time] [2021-11-12 22:39:15,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2021-11-12 22:39:16,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2460. [2021-11-12 22:39:16,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 1826 states have (on average 1.2628696604600218) internal successors, (2306), 1980 states have internal predecessors, (2306), 365 states have call successors, (365), 253 states have call predecessors, (365), 268 states have return successors, (572), 363 states have call predecessors, (572), 365 states have call successors, (572) [2021-11-12 22:39:16,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3243 transitions. [2021-11-12 22:39:16,153 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3243 transitions. Word has length 136 [2021-11-12 22:39:16,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:16,154 INFO L470 AbstractCegarLoop]: Abstraction has 2460 states and 3243 transitions. [2021-11-12 22:39:16,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-12 22:39:16,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3243 transitions. [2021-11-12 22:39:16,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-12 22:39:16,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:16,162 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:16,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:16,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:16,379 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:16,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:16,380 INFO L85 PathProgramCache]: Analyzing trace with hash -727153918, now seen corresponding path program 1 times [2021-11-12 22:39:16,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:16,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023721108] [2021-11-12 22:39:16,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:16,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:16,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:16,383 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:16,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:39:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:16,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:39:16,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 22:39:17,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 22:39:17,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:17,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023721108] [2021-11-12 22:39:17,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023721108] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:39:17,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2028405496] [2021-11-12 22:39:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:17,532 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:39:17,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:39:17,533 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:39:17,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 22:39:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:17,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:39:17,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 22:39:18,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 22:39:18,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2028405496] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:39:18,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285327609] [2021-11-12 22:39:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:18,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:39:18,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:39:18,570 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:39:18,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-12 22:39:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:18,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:39:18,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 22:39:19,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:19,520 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 22:39:19,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285327609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:39:19,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:39:19,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-12 22:39:19,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618549755] [2021-11-12 22:39:19,521 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:39:19,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:39:19,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:19,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:39:19,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:39:19,523 INFO L87 Difference]: Start difference. First operand 2460 states and 3243 transitions. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 8 states have internal predecessors, (136), 5 states have call successors, (23), 4 states have call predecessors, (23), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-12 22:39:21,204 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:22,929 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:24,645 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:25,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:25,533 INFO L93 Difference]: Finished difference Result 4779 states and 6416 transitions. [2021-11-12 22:39:25,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:39:25,534 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 8 states have internal predecessors, (136), 5 states have call successors, (23), 4 states have call predecessors, (23), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) Word has length 138 [2021-11-12 22:39:25,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:25,560 INFO L225 Difference]: With dead ends: 4779 [2021-11-12 22:39:25,560 INFO L226 Difference]: Without dead ends: 2805 [2021-11-12 22:39:25,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 835 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:39:25,575 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 311 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5532.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.99ms SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5626.80ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:25,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1832 Invalid, 412 Unknown, 0 Unchecked, 11.99ms Time], IncrementalHoareTripleChecker [95 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 5626.80ms Time] [2021-11-12 22:39:25,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2021-11-12 22:39:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2552. [2021-11-12 22:39:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 1887 states have (on average 1.2469528351881294) internal successors, (2353), 2053 states have internal predecessors, (2353), 376 states have call successors, (376), 278 states have call predecessors, (376), 288 states have return successors, (522), 360 states have call predecessors, (522), 376 states have call successors, (522) [2021-11-12 22:39:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 3251 transitions. [2021-11-12 22:39:25,832 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 3251 transitions. Word has length 138 [2021-11-12 22:39:25,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:25,833 INFO L470 AbstractCegarLoop]: Abstraction has 2552 states and 3251 transitions. [2021-11-12 22:39:25,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 8 states have internal predecessors, (136), 5 states have call successors, (23), 4 states have call predecessors, (23), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-12 22:39:25,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 3251 transitions. [2021-11-12 22:39:25,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-12 22:39:25,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:25,851 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:25,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:26,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:26,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:26,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:39:26,486 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:26,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:26,487 INFO L85 PathProgramCache]: Analyzing trace with hash -729053252, now seen corresponding path program 1 times [2021-11-12 22:39:26,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:26,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705333725] [2021-11-12 22:39:26,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:26,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:26,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:26,490 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:26,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:39:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:26,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:39:26,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 142 proven. 14 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 22:39:27,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 78 proven. 41 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-12 22:39:28,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:28,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705333725] [2021-11-12 22:39:28,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705333725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:39:28,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [568333767] [2021-11-12 22:39:28,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:28,774 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:39:28,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:39:28,774 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:39:28,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 22:39:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:29,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:39:29,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-12 22:39:29,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-12 22:39:30,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [568333767] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:30,029 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:39:30,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [10, 11] total 20 [2021-11-12 22:39:30,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785898162] [2021-11-12 22:39:30,030 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:30,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:39:30,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:30,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:39:30,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:39:30,032 INFO L87 Difference]: Start difference. First operand 2552 states and 3251 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-12 22:39:31,698 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:32,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:32,043 INFO L93 Difference]: Finished difference Result 7440 states and 9623 transitions. [2021-11-12 22:39:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:39:32,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 229 [2021-11-12 22:39:32,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:32,088 INFO L225 Difference]: With dead ends: 7440 [2021-11-12 22:39:32,088 INFO L226 Difference]: Without dead ends: 4911 [2021-11-12 22:39:32,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 912 GetRequests, 894 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:39:32,101 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 103 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1668.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.08ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1678.40ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:32,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 455 Invalid, 4 Unknown, 0 Unchecked, 2.08ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 1678.40ms Time] [2021-11-12 22:39:32,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4911 states. [2021-11-12 22:39:32,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4911 to 4909. [2021-11-12 22:39:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4909 states, 3659 states have (on average 1.2459688439464334) internal successors, (4559), 3934 states have internal predecessors, (4559), 682 states have call successors, (682), 547 states have call predecessors, (682), 567 states have return successors, (1032), 638 states have call predecessors, (1032), 682 states have call successors, (1032) [2021-11-12 22:39:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4909 states to 4909 states and 6273 transitions. [2021-11-12 22:39:32,595 INFO L78 Accepts]: Start accepts. Automaton has 4909 states and 6273 transitions. Word has length 229 [2021-11-12 22:39:32,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:32,596 INFO L470 AbstractCegarLoop]: Abstraction has 4909 states and 6273 transitions. [2021-11-12 22:39:32,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-12 22:39:32,597 INFO L276 IsEmpty]: Start isEmpty. Operand 4909 states and 6273 transitions. [2021-11-12 22:39:32,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-12 22:39:32,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:32,626 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:32,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:32,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:33,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:33,038 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:33,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:33,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1743428295, now seen corresponding path program 1 times [2021-11-12 22:39:33,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:33,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675441267] [2021-11-12 22:39:33,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:33,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:33,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:33,041 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:33,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:39:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:33,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:39:33,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 144 proven. 14 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:39:33,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 79 proven. 44 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-12 22:39:35,062 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:35,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675441267] [2021-11-12 22:39:35,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675441267] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:39:35,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1295334184] [2021-11-12 22:39:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:35,063 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:39:35,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:39:35,064 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:39:35,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 22:39:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:35,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:39:35,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-12 22:39:35,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 84 proven. 7 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-12 22:39:36,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1295334184] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:39:36,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:39:36,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10, 11, 3] total 20 [2021-11-12 22:39:36,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123605377] [2021-11-12 22:39:36,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:36,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:39:36,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:36,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:39:36,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:39:36,379 INFO L87 Difference]: Start difference. First operand 4909 states and 6273 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-12 22:39:36,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:36,696 INFO L93 Difference]: Finished difference Result 7554 states and 9595 transitions. [2021-11-12 22:39:36,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:39:36,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 235 [2021-11-12 22:39:36,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:36,741 INFO L225 Difference]: With dead ends: 7554 [2021-11-12 22:39:36,741 INFO L226 Difference]: Without dead ends: 5049 [2021-11-12 22:39:36,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 936 GetRequests, 918 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:39:36,758 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 93 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.73ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.19ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:36,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 392 Invalid, 4 Unknown, 0 Unchecked, 1.73ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 21.19ms Time] [2021-11-12 22:39:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5049 states. [2021-11-12 22:39:37,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5049 to 5047. [2021-11-12 22:39:37,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5047 states, 3767 states have (on average 1.2415715423413858) internal successors, (4677), 4047 states have internal predecessors, (4677), 698 states have call successors, (698), 563 states have call predecessors, (698), 581 states have return successors, (964), 651 states have call predecessors, (964), 698 states have call successors, (964) [2021-11-12 22:39:37,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5047 states to 5047 states and 6339 transitions. [2021-11-12 22:39:37,186 INFO L78 Accepts]: Start accepts. Automaton has 5047 states and 6339 transitions. Word has length 235 [2021-11-12 22:39:37,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:37,187 INFO L470 AbstractCegarLoop]: Abstraction has 5047 states and 6339 transitions. [2021-11-12 22:39:37,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-12 22:39:37,187 INFO L276 IsEmpty]: Start isEmpty. Operand 5047 states and 6339 transitions. [2021-11-12 22:39:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-12 22:39:37,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:37,213 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:37,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:37,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:37,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:39:37,627 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:37,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:37,628 INFO L85 PathProgramCache]: Analyzing trace with hash 426442613, now seen corresponding path program 1 times [2021-11-12 22:39:37,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:37,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454359075] [2021-11-12 22:39:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:37,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:37,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:37,631 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:37,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:39:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:37,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:39:37,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 154 proven. 14 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 22:39:38,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 80 proven. 46 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-12 22:39:39,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:39,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454359075] [2021-11-12 22:39:39,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454359075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:39:39,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1274484449] [2021-11-12 22:39:39,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:39,833 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:39:39,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:39:39,835 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:39:39,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 22:39:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:40,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:39:40,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-12 22:39:40,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-12 22:39:41,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1274484449] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:39:41,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:39:41,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10, 11, 4] total 21 [2021-11-12 22:39:41,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77962919] [2021-11-12 22:39:41,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:41,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:39:41,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:41,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:39:41,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:39:41,111 INFO L87 Difference]: Start difference. First operand 5047 states and 6339 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-12 22:39:42,816 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:43,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:43,438 INFO L93 Difference]: Finished difference Result 14218 states and 18246 transitions. [2021-11-12 22:39:43,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:39:43,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 235 [2021-11-12 22:39:43,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:43,527 INFO L225 Difference]: With dead ends: 14218 [2021-11-12 22:39:43,528 INFO L226 Difference]: Without dead ends: 9332 [2021-11-12 22:39:43,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 936 GetRequests, 917 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:39:43,553 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 99 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1708.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.51ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1724.51ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:43,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 458 Invalid, 4 Unknown, 0 Unchecked, 2.51ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 1724.51ms Time] [2021-11-12 22:39:43,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9332 states. [2021-11-12 22:39:44,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9332 to 9315. [2021-11-12 22:39:44,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9315 states, 6989 states have (on average 1.2352267849477752) internal successors, (8633), 7414 states have internal predecessors, (8633), 1227 states have call successors, (1227), 1078 states have call predecessors, (1227), 1098 states have return successors, (1951), 1129 states have call predecessors, (1951), 1227 states have call successors, (1951) [2021-11-12 22:39:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9315 states to 9315 states and 11811 transitions. [2021-11-12 22:39:44,494 INFO L78 Accepts]: Start accepts. Automaton has 9315 states and 11811 transitions. Word has length 235 [2021-11-12 22:39:44,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:44,495 INFO L470 AbstractCegarLoop]: Abstraction has 9315 states and 11811 transitions. [2021-11-12 22:39:44,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-12 22:39:44,495 INFO L276 IsEmpty]: Start isEmpty. Operand 9315 states and 11811 transitions. [2021-11-12 22:39:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-12 22:39:44,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:44,610 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:44,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-12 22:39:44,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:45,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:45,013 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:45,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:45,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1499709022, now seen corresponding path program 1 times [2021-11-12 22:39:45,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:45,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580092694] [2021-11-12 22:39:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:45,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:45,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:45,015 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:45,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:39:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:45,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:39:45,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 148 proven. 14 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-12 22:39:45,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 79 proven. 43 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-12 22:39:46,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:46,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580092694] [2021-11-12 22:39:46,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580092694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:39:46,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1062168677] [2021-11-12 22:39:46,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:46,907 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:39:46,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:39:46,908 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:39:46,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 22:39:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:47,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:39:47,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 22:39:47,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 92 proven. 11 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-12 22:39:48,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1062168677] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:39:48,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:39:48,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10, 11, 4] total 21 [2021-11-12 22:39:48,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599771368] [2021-11-12 22:39:48,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:48,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:39:48,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:48,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:39:48,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:39:48,183 INFO L87 Difference]: Start difference. First operand 9315 states and 11811 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:39:48,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:48,886 INFO L93 Difference]: Finished difference Result 14178 states and 17829 transitions. [2021-11-12 22:39:48,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:39:48,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 233 [2021-11-12 22:39:48,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:48,953 INFO L225 Difference]: With dead ends: 14178 [2021-11-12 22:39:48,953 INFO L226 Difference]: Without dead ends: 9340 [2021-11-12 22:39:48,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 909 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:39:48,978 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 94 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.00ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.35ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:48,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 404 Invalid, 4 Unknown, 0 Unchecked, 2.00ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 25.35ms Time] [2021-11-12 22:39:48,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9340 states. [2021-11-12 22:39:49,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9340 to 9068. [2021-11-12 22:39:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9068 states, 6805 states have (on average 1.228067597354886) internal successors, (8357), 7219 states have internal predecessors, (8357), 1197 states have call successors, (1197), 1052 states have call predecessors, (1197), 1065 states have return successors, (1666), 1093 states have call predecessors, (1666), 1197 states have call successors, (1666) [2021-11-12 22:39:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9068 states to 9068 states and 11220 transitions. [2021-11-12 22:39:49,778 INFO L78 Accepts]: Start accepts. Automaton has 9068 states and 11220 transitions. Word has length 233 [2021-11-12 22:39:49,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:49,779 INFO L470 AbstractCegarLoop]: Abstraction has 9068 states and 11220 transitions. [2021-11-12 22:39:49,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:39:49,779 INFO L276 IsEmpty]: Start isEmpty. Operand 9068 states and 11220 transitions. [2021-11-12 22:39:49,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-12 22:39:49,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:49,859 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:49,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-12 22:39:50,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:50,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:50,262 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:50,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:50,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1154009678, now seen corresponding path program 1 times [2021-11-12 22:39:50,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:50,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146521643] [2021-11-12 22:39:50,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:50,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:50,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:50,266 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:50,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:39:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:50,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:39:50,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 167 proven. 14 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-12 22:39:51,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-12 22:39:52,323 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:52,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146521643] [2021-11-12 22:39:52,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146521643] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:39:52,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1876630502] [2021-11-12 22:39:52,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:52,324 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:39:52,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:39:52,327 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:39:52,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 22:39:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:52,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:39:52,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-11-12 22:39:52,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-12 22:39:53,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1876630502] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:53,509 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:39:53,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [10, 11] total 20 [2021-11-12 22:39:53,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201546704] [2021-11-12 22:39:53,509 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:53,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:39:53,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:53,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:39:53,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:39:53,512 INFO L87 Difference]: Start difference. First operand 9068 states and 11220 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-12 22:39:55,381 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:55,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:55,728 INFO L93 Difference]: Finished difference Result 14572 states and 18008 transitions. [2021-11-12 22:39:55,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:39:55,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 241 [2021-11-12 22:39:55,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:55,756 INFO L225 Difference]: With dead ends: 14572 [2021-11-12 22:39:55,757 INFO L226 Difference]: Without dead ends: 5676 [2021-11-12 22:39:55,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 942 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:39:55,778 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 39 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1873.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.52ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1886.03ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:55,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 382 Invalid, 5 Unknown, 0 Unchecked, 1.52ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 1886.03ms Time] [2021-11-12 22:39:55,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-11-12 22:39:56,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 5608. [2021-11-12 22:39:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5608 states, 4228 states have (on average 1.2220908230842005) internal successors, (5167), 4489 states have internal predecessors, (5167), 738 states have call successors, (738), 648 states have call predecessors, (738), 641 states have return successors, (921), 662 states have call predecessors, (921), 738 states have call successors, (921) [2021-11-12 22:39:56,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5608 states to 5608 states and 6826 transitions. [2021-11-12 22:39:56,131 INFO L78 Accepts]: Start accepts. Automaton has 5608 states and 6826 transitions. Word has length 241 [2021-11-12 22:39:56,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:56,132 INFO L470 AbstractCegarLoop]: Abstraction has 5608 states and 6826 transitions. [2021-11-12 22:39:56,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-12 22:39:56,133 INFO L276 IsEmpty]: Start isEmpty. Operand 5608 states and 6826 transitions. [2021-11-12 22:39:56,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-12 22:39:56,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:56,154 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:56,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:56,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:56,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:39:56,567 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:56,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:56,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1805768186, now seen corresponding path program 1 times [2021-11-12 22:39:56,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:56,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989651935] [2021-11-12 22:39:56,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:56,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:56,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:56,571 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:56,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:39:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:56,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:39:56,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 160 proven. 15 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:39:57,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 84 proven. 52 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-12 22:39:58,960 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:58,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989651935] [2021-11-12 22:39:58,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989651935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:39:58,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1715141324] [2021-11-12 22:39:58,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:58,962 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:39:58,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:39:58,967 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:39:58,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-12 22:39:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:59,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:39:59,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-12 22:40:00,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-12 22:40:00,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1715141324] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:00,943 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:40:00,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 8] imperfect sequences [10, 11] total 29 [2021-11-12 22:40:00,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874067810] [2021-11-12 22:40:00,944 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:00,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:40:00,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:00,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:40:00,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:40:00,947 INFO L87 Difference]: Start difference. First operand 5608 states and 6826 transitions. Second operand has 12 states, 12 states have (on average 15.666666666666666) internal successors, (188), 10 states have internal predecessors, (188), 4 states have call successors, (43), 3 states have call predecessors, (43), 6 states have return successors, (46), 6 states have call predecessors, (46), 4 states have call successors, (46) [2021-11-12 22:40:02,724 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:04,440 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:06,142 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:07,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:09,427 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:10,534 INFO L93 Difference]: Finished difference Result 16628 states and 20458 transitions. [2021-11-12 22:40:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:40:10,535 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 15.666666666666666) internal successors, (188), 10 states have internal predecessors, (188), 4 states have call successors, (43), 3 states have call predecessors, (43), 6 states have return successors, (46), 6 states have call predecessors, (46), 4 states have call successors, (46) Word has length 246 [2021-11-12 22:40:10,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:10,586 INFO L225 Difference]: With dead ends: 16628 [2021-11-12 22:40:10,586 INFO L226 Difference]: Without dead ends: 11065 [2021-11-12 22:40:10,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 953 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:40:10,603 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 264 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8833.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.87ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8926.93ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:10,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 1222 Invalid, 456 Unknown, 0 Unchecked, 8.87ms Time], IncrementalHoareTripleChecker [10 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 8926.93ms Time] [2021-11-12 22:40:10,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11065 states. [2021-11-12 22:40:11,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11065 to 11048. [2021-11-12 22:40:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11048 states, 8340 states have (on average 1.1964028776978417) internal successors, (9978), 8842 states have internal predecessors, (9978), 1445 states have call successors, (1445), 1278 states have call predecessors, (1445), 1262 states have return successors, (1800), 1298 states have call predecessors, (1800), 1445 states have call successors, (1800) [2021-11-12 22:40:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11048 states to 11048 states and 13223 transitions. [2021-11-12 22:40:11,507 INFO L78 Accepts]: Start accepts. Automaton has 11048 states and 13223 transitions. Word has length 246 [2021-11-12 22:40:11,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:11,508 INFO L470 AbstractCegarLoop]: Abstraction has 11048 states and 13223 transitions. [2021-11-12 22:40:11,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.666666666666666) internal successors, (188), 10 states have internal predecessors, (188), 4 states have call successors, (43), 3 states have call predecessors, (43), 6 states have return successors, (46), 6 states have call predecessors, (46), 4 states have call successors, (46) [2021-11-12 22:40:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 11048 states and 13223 transitions. [2021-11-12 22:40:11,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-12 22:40:11,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:11,547 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:11,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:11,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:11,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:11,966 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:11,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash 921151601, now seen corresponding path program 1 times [2021-11-12 22:40:11,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:11,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470268920] [2021-11-12 22:40:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:11,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:11,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:11,970 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:12,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:40:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:12,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:40:12,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 174 proven. 14 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-12 22:40:13,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 87 proven. 53 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-12 22:40:14,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:14,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470268920] [2021-11-12 22:40:14,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470268920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:40:14,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [261229882] [2021-11-12 22:40:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:14,486 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:40:14,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:40:14,491 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:40:14,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-12 22:40:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:14,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:40:14,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-11-12 22:40:15,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 86 proven. 3 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-12 22:40:15,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [261229882] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:40:15,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:40:15,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 12, 5] total 23 [2021-11-12 22:40:15,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925784044] [2021-11-12 22:40:15,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:15,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:40:15,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:15,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:40:15,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:40:15,749 INFO L87 Difference]: Start difference. First operand 11048 states and 13223 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-12 22:40:16,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:16,391 INFO L93 Difference]: Finished difference Result 15720 states and 18842 transitions. [2021-11-12 22:40:16,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:40:16,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 246 [2021-11-12 22:40:16,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:16,443 INFO L225 Difference]: With dead ends: 15720 [2021-11-12 22:40:16,443 INFO L226 Difference]: Without dead ends: 11160 [2021-11-12 22:40:16,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 959 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:40:16,460 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 12 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.23ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.79ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:16,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 701 Invalid, 17 Unknown, 0 Unchecked, 2.23ms Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 19.79ms Time] [2021-11-12 22:40:16,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11160 states. [2021-11-12 22:40:17,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11160 to 11096. [2021-11-12 22:40:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11096 states, 8388 states have (on average 1.1952789699570816) internal successors, (10026), 8890 states have internal predecessors, (10026), 1445 states have call successors, (1445), 1278 states have call predecessors, (1445), 1262 states have return successors, (1800), 1298 states have call predecessors, (1800), 1445 states have call successors, (1800) [2021-11-12 22:40:17,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11096 states to 11096 states and 13271 transitions. [2021-11-12 22:40:17,524 INFO L78 Accepts]: Start accepts. Automaton has 11096 states and 13271 transitions. Word has length 246 [2021-11-12 22:40:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:17,525 INFO L470 AbstractCegarLoop]: Abstraction has 11096 states and 13271 transitions. [2021-11-12 22:40:17,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-12 22:40:17,525 INFO L276 IsEmpty]: Start isEmpty. Operand 11096 states and 13271 transitions. [2021-11-12 22:40:17,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-12 22:40:17,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:17,552 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:17,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:17,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:17,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:17,961 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:17,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:17,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1171531821, now seen corresponding path program 1 times [2021-11-12 22:40:17,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:17,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631382074] [2021-11-12 22:40:17,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:17,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:17,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:17,963 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:17,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:40:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:18,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:40:18,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 170 proven. 14 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-12 22:40:19,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 86 proven. 50 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-12 22:40:20,238 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:20,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631382074] [2021-11-12 22:40:20,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631382074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:40:20,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1326425549] [2021-11-12 22:40:20,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:20,239 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:40:20,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:40:20,240 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:40:20,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-12 22:40:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:20,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:40:20,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-12 22:40:21,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-11-12 22:40:21,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1326425549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:40:21,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804617887] [2021-11-12 22:40:21,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:21,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:40:21,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:40:21,654 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:40:21,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-12 22:40:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:21,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:40:21,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-12 22:40:22,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 96 proven. 27 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-11-12 22:40:23,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804617887] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:40:23,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:40:23,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11, 12, 7, 7, 10] total 37 [2021-11-12 22:40:23,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817930487] [2021-11-12 22:40:23,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:23,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:40:23,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:23,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:40:23,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-11-12 22:40:23,454 INFO L87 Difference]: Start difference. First operand 11096 states and 13271 transitions. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 5 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-12 22:40:25,384 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:26,971 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:28,855 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:30,558 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:32,094 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:33,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:33,998 INFO L93 Difference]: Finished difference Result 30213 states and 36987 transitions. [2021-11-12 22:40:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 22:40:33,999 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 5 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) Word has length 242 [2021-11-12 22:40:33,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:34,100 INFO L225 Difference]: With dead ends: 30213 [2021-11-12 22:40:34,100 INFO L226 Difference]: Without dead ends: 15760 [2021-11-12 22:40:34,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1454 GetRequests, 1412 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2021-11-12 22:40:34,141 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 241 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9383.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.20ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9532.24ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:34,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 756 Invalid, 880 Unknown, 0 Unchecked, 7.20ms Time], IncrementalHoareTripleChecker [75 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 9532.24ms Time] [2021-11-12 22:40:34,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15760 states. [2021-11-12 22:40:35,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15760 to 13377. [2021-11-12 22:40:35,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13377 states, 10166 states have (on average 1.1905370843989769) internal successors, (12103), 10808 states have internal predecessors, (12103), 1682 states have call successors, (1682), 1491 states have call predecessors, (1682), 1528 states have return successors, (2221), 1572 states have call predecessors, (2221), 1682 states have call successors, (2221) [2021-11-12 22:40:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13377 states to 13377 states and 16006 transitions. [2021-11-12 22:40:35,258 INFO L78 Accepts]: Start accepts. Automaton has 13377 states and 16006 transitions. Word has length 242 [2021-11-12 22:40:35,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:35,259 INFO L470 AbstractCegarLoop]: Abstraction has 13377 states and 16006 transitions. [2021-11-12 22:40:35,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 5 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-12 22:40:35,259 INFO L276 IsEmpty]: Start isEmpty. Operand 13377 states and 16006 transitions. [2021-11-12 22:40:35,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-12 22:40:35,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:35,299 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:35,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:35,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:35,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:35,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:35,919 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:35,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:35,920 INFO L85 PathProgramCache]: Analyzing trace with hash 147419357, now seen corresponding path program 1 times [2021-11-12 22:40:35,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:35,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429164236] [2021-11-12 22:40:35,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:35,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:35,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:35,922 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:35,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 22:40:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:36,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:40:36,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 200 proven. 14 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 22:40:36,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 92 proven. 53 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-11-12 22:40:38,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:38,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429164236] [2021-11-12 22:40:38,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429164236] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:40:38,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1816297649] [2021-11-12 22:40:38,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:38,128 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:40:38,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:40:38,129 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:40:38,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 22:40:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:38,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:40:38,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 212 proven. 13 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 22:40:39,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 108 proven. 80 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-12 22:40:40,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1816297649] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:40:40,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851724361] [2021-11-12 22:40:40,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:40,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:40:40,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:40:40,548 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:40:40,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-12 22:40:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:40,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:40:40,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 212 proven. 13 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 22:40:41,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 108 proven. 80 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-12 22:40:42,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851724361] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:40:42,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:40:42,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 8, 8, 8, 8] total 32 [2021-11-12 22:40:42,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345187726] [2021-11-12 22:40:42,190 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:40:42,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-12 22:40:42,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:42,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-12 22:40:42,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:40:42,193 INFO L87 Difference]: Start difference. First operand 13377 states and 16006 transitions. Second operand has 32 states, 32 states have (on average 11.40625) internal successors, (365), 29 states have internal predecessors, (365), 17 states have call successors, (65), 9 states have call predecessors, (65), 18 states have return successors, (74), 17 states have call predecessors, (74), 17 states have call successors, (74) [2021-11-12 22:40:44,005 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:45,962 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:47,621 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:49,377 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:51,189 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:52,894 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:54,542 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:56,390 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:57,981 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:59,669 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:01,465 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:03,162 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:04,888 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:06,848 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:08,685 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:10,382 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:12,117 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:19,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:19,342 INFO L93 Difference]: Finished difference Result 28550 states and 34657 transitions. [2021-11-12 22:41:19,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-12 22:41:19,343 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 11.40625) internal successors, (365), 29 states have internal predecessors, (365), 17 states have call successors, (65), 9 states have call predecessors, (65), 18 states have return successors, (74), 17 states have call predecessors, (74), 17 states have call successors, (74) Word has length 254 [2021-11-12 22:41:19,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:19,432 INFO L225 Difference]: With dead ends: 28550 [2021-11-12 22:41:19,432 INFO L226 Difference]: Without dead ends: 16011 [2021-11-12 22:41:19,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1596 GetRequests, 1513 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=995, Invalid=6145, Unknown=0, NotChecked=0, Total=7140 [2021-11-12 22:41:19,471 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 2186 mSDsluCounter, 3848 mSDsCounter, 0 mSdLazyCounter, 5531 mSolverCounterSat, 989 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33612.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2189 SdHoareTripleChecker+Valid, 4307 SdHoareTripleChecker+Invalid, 6520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.56ms SdHoareTripleChecker+Time, 989 IncrementalHoareTripleChecker+Valid, 5531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34341.34ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:19,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2189 Valid, 4307 Invalid, 6520 Unknown, 0 Unchecked, 35.56ms Time], IncrementalHoareTripleChecker [989 Valid, 5531 Invalid, 0 Unknown, 0 Unchecked, 34341.34ms Time] [2021-11-12 22:41:19,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16011 states. [2021-11-12 22:41:20,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16011 to 12219. [2021-11-12 22:41:20,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12219 states, 9247 states have (on average 1.1714069427922569) internal successors, (10832), 9809 states have internal predecessors, (10832), 1501 states have call successors, (1501), 1408 states have call predecessors, (1501), 1470 states have return successors, (1791), 1441 states have call predecessors, (1791), 1501 states have call successors, (1791) [2021-11-12 22:41:20,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12219 states to 12219 states and 14124 transitions. [2021-11-12 22:41:20,763 INFO L78 Accepts]: Start accepts. Automaton has 12219 states and 14124 transitions. Word has length 254 [2021-11-12 22:41:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:20,763 INFO L470 AbstractCegarLoop]: Abstraction has 12219 states and 14124 transitions. [2021-11-12 22:41:20,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 11.40625) internal successors, (365), 29 states have internal predecessors, (365), 17 states have call successors, (65), 9 states have call predecessors, (65), 18 states have return successors, (74), 17 states have call predecessors, (74), 17 states have call successors, (74) [2021-11-12 22:41:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand 12219 states and 14124 transitions. [2021-11-12 22:41:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-11-12 22:41:20,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:20,789 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:41:20,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:21,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:21,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:21,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:41:21,403 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:21,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:21,404 INFO L85 PathProgramCache]: Analyzing trace with hash 52793847, now seen corresponding path program 1 times [2021-11-12 22:41:21,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:21,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239184270] [2021-11-12 22:41:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:21,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:21,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:21,406 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:21,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 22:41:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:21,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:41:21,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-12 22:41:22,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-11-12 22:41:23,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:23,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239184270] [2021-11-12 22:41:23,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239184270] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:41:23,082 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:41:23,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:41:23,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120325860] [2021-11-12 22:41:23,082 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:23,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:41:23,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:23,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:41:23,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:41:23,084 INFO L87 Difference]: Start difference. First operand 12219 states and 14124 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-12 22:41:24,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:24,339 INFO L93 Difference]: Finished difference Result 36195 states and 41842 transitions. [2021-11-12 22:41:24,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:41:24,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 291 [2021-11-12 22:41:24,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:24,435 INFO L225 Difference]: With dead ends: 36195 [2021-11-12 22:41:24,436 INFO L226 Difference]: Without dead ends: 18115 [2021-11-12 22:41:24,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:41:24,472 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 86 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.34ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:24,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 382 Invalid, 4 Unknown, 0 Unchecked, 1.34ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 21.07ms Time] [2021-11-12 22:41:24,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18115 states. [2021-11-12 22:41:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18115 to 18040. [2021-11-12 22:41:25,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18040 states, 13608 states have (on average 1.1446942974720753) internal successors, (15577), 14411 states have internal predecessors, (15577), 2232 states have call successors, (2232), 2089 states have call predecessors, (2232), 2199 states have return successors, (2692), 2159 states have call predecessors, (2692), 2232 states have call successors, (2692) [2021-11-12 22:41:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18040 states to 18040 states and 20501 transitions. [2021-11-12 22:41:25,915 INFO L78 Accepts]: Start accepts. Automaton has 18040 states and 20501 transitions. Word has length 291 [2021-11-12 22:41:25,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:25,916 INFO L470 AbstractCegarLoop]: Abstraction has 18040 states and 20501 transitions. [2021-11-12 22:41:25,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-12 22:41:25,916 INFO L276 IsEmpty]: Start isEmpty. Operand 18040 states and 20501 transitions. [2021-11-12 22:41:25,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-11-12 22:41:25,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:25,950 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:41:25,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:26,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:26,153 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:26,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:26,154 INFO L85 PathProgramCache]: Analyzing trace with hash 11787525, now seen corresponding path program 1 times [2021-11-12 22:41:26,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:26,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010312273] [2021-11-12 22:41:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:26,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:26,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:26,155 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:26,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 22:41:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:26,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 22:41:26,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 95 proven. 149 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-12 22:41:27,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 26 proven. 183 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-11-12 22:41:28,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:28,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010312273] [2021-11-12 22:41:28,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010312273] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:41:28,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2061910335] [2021-11-12 22:41:28,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:28,372 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:41:28,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:41:28,373 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:41:28,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-12 22:41:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:28,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-12 22:41:28,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 95 proven. 149 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-12 22:41:29,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 26 proven. 183 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-11-12 22:41:30,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2061910335] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:41:30,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281625341] [2021-11-12 22:41:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:30,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:41:30,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:41:30,518 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:41:30,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-12 22:41:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:30,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-12 22:41:30,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 145 proven. 157 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-12 22:41:31,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 92 proven. 173 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-12 22:41:36,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281625341] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:41:36,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:41:36,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 10, 14, 13, 20] total 35 [2021-11-12 22:41:36,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256576046] [2021-11-12 22:41:36,833 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:41:36,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-12 22:41:36,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:36,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-12 22:41:36,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2021-11-12 22:41:36,836 INFO L87 Difference]: Start difference. First operand 18040 states and 20501 transitions. Second operand has 35 states, 35 states have (on average 10.085714285714285) internal successors, (353), 33 states have internal predecessors, (353), 24 states have call successors, (77), 14 states have call predecessors, (77), 24 states have return successors, (83), 24 states have call predecessors, (83), 24 states have call successors, (83) [2021-11-12 22:41:38,332 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:39,994 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:41,756 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:43,338 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:45,127 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:46,974 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:48,487 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:50,327 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:52,035 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:53,842 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:55,557 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:57,164 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:42:00,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:00,272 INFO L93 Difference]: Finished difference Result 27886 states and 31612 transitions. [2021-11-12 22:42:00,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:42:00,273 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 10.085714285714285) internal successors, (353), 33 states have internal predecessors, (353), 24 states have call successors, (77), 14 states have call predecessors, (77), 24 states have return successors, (83), 24 states have call predecessors, (83), 24 states have call successors, (83) Word has length 291 [2021-11-12 22:42:00,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:00,281 INFO L225 Difference]: With dead ends: 27886 [2021-11-12 22:42:00,282 INFO L226 Difference]: Without dead ends: 0 [2021-11-12 22:42:00,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1753 GetRequests, 1708 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=404, Invalid=1576, Unknown=0, NotChecked=0, Total=1980 [2021-11-12 22:42:00,317 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 2634 mSDsluCounter, 1926 mSDsCounter, 0 mSdLazyCounter, 2200 mSolverCounterSat, 1228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21918.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2639 SdHoareTripleChecker+Valid, 2267 SdHoareTripleChecker+Invalid, 3428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.47ms SdHoareTripleChecker+Time, 1228 IncrementalHoareTripleChecker+Valid, 2200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22269.50ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:00,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2639 Valid, 2267 Invalid, 3428 Unknown, 0 Unchecked, 16.47ms Time], IncrementalHoareTripleChecker [1228 Valid, 2200 Invalid, 0 Unknown, 0 Unchecked, 22269.50ms Time] [2021-11-12 22:42:00,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-12 22:42:00,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-12 22:42:00,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:42:00,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-12 22:42:00,324 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 291 [2021-11-12 22:42:00,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:00,325 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-12 22:42:00,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 10.085714285714285) internal successors, (353), 33 states have internal predecessors, (353), 24 states have call successors, (77), 14 states have call predecessors, (77), 24 states have return successors, (83), 24 states have call predecessors, (83), 24 states have call successors, (83) [2021-11-12 22:42:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-12 22:42:00,326 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-12 22:42:00,328 INFO L764 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 22:42:00,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:00,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:00,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-12 22:42:00,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40845f-acd7-4e47-aeed-0b9434454a61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:42:00,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-12 22:42:24,849 WARN L227 SmtUtils]: Spent 14.04s on a formula simplification. DAG size of input: 862 DAG size of output: 716 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-12 22:42:30,391 WARN L227 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 545 DAG size of output: 432 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-12 22:42:42,055 WARN L227 SmtUtils]: Spent 11.48s on a formula simplification. DAG size of input: 711 DAG size of output: 661 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-12 22:43:17,223 WARN L227 SmtUtils]: Spent 30.01s on a formula simplification. DAG size of input: 1265 DAG size of output: 991 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-12 22:43:26,093 WARN L227 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 584 DAG size of output: 470 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-12 22:44:01,041 WARN L227 SmtUtils]: Spent 33.42s on a formula simplification. DAG size of input: 1786 DAG size of output: 70 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:44:15,605 WARN L227 SmtUtils]: Spent 14.51s on a formula simplification. DAG size of input: 997 DAG size of output: 71 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:44:43,734 WARN L227 SmtUtils]: Spent 28.02s on a formula simplification. DAG size of input: 1948 DAG size of output: 73 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:45:08,179 WARN L227 SmtUtils]: Spent 16.66s on a formula simplification. DAG size of input: 1054 DAG size of output: 68 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:45:13,324 WARN L227 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 607 DAG size of output: 49 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:45:30,328 WARN L227 SmtUtils]: Spent 16.95s on a formula simplification. DAG size of input: 1168 DAG size of output: 57 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:45:58,593 WARN L227 SmtUtils]: Spent 28.20s on a formula simplification. DAG size of input: 1948 DAG size of output: 73 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:46:15,942 WARN L227 SmtUtils]: Spent 12.97s on a formula simplification. DAG size of input: 968 DAG size of output: 48 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:46:31,822 WARN L227 SmtUtils]: Spent 15.83s on a formula simplification. DAG size of input: 1015 DAG size of output: 74 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:46:40,698 WARN L227 SmtUtils]: Spent 8.85s on a formula simplification. DAG size of input: 603 DAG size of output: 53 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:46:49,439 WARN L227 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 716 DAG size of output: 42 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:47:07,738 WARN L227 SmtUtils]: Spent 18.25s on a formula simplification. DAG size of input: 1513 DAG size of output: 71 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:47:16,554 WARN L227 SmtUtils]: Spent 5.65s on a formula simplification. DAG size of input: 457 DAG size of output: 46 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:47:23,876 WARN L227 SmtUtils]: Spent 7.32s on a formula simplification. DAG size of input: 661 DAG size of output: 41 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:47:49,778 WARN L227 SmtUtils]: Spent 22.38s on a formula simplification. DAG size of input: 2163 DAG size of output: 1 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:47:58,797 WARN L227 SmtUtils]: Spent 5.77s on a formula simplification. DAG size of input: 484 DAG size of output: 49 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:48:06,414 WARN L227 SmtUtils]: Spent 7.60s on a formula simplification. DAG size of input: 587 DAG size of output: 63 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:48:25,859 WARN L227 SmtUtils]: Spent 11.94s on a formula simplification. DAG size of input: 1323 DAG size of output: 54 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:48:59,538 WARN L227 SmtUtils]: Spent 33.61s on a formula simplification. DAG size of input: 1489 DAG size of output: 97 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:49:54,795 WARN L227 SmtUtils]: Spent 55.19s on a formula simplification. DAG size of input: 1818 DAG size of output: 106 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:50:18,576 WARN L227 SmtUtils]: Spent 20.42s on a formula simplification. DAG size of input: 1125 DAG size of output: 93 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:50:33,191 WARN L227 SmtUtils]: Spent 14.60s on a formula simplification. DAG size of input: 991 DAG size of output: 43 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:50:40,404 WARN L227 SmtUtils]: Spent 7.19s on a formula simplification. DAG size of input: 505 DAG size of output: 53 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)