./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/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_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/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_f59b3f79-52e1-4488-a785-8d6e79bf32fa/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 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:22:59,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:22:59,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:22:59,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:22:59,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:22:59,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:22:59,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:22:59,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:22:59,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:22:59,664 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:22:59,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:22:59,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:22:59,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:22:59,672 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:22:59,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:22:59,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:22:59,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:22:59,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:22:59,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:22:59,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:22:59,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:22:59,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:22:59,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:22:59,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:22:59,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:22:59,718 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:22:59,718 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:22:59,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:22:59,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:22:59,724 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:22:59,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:22:59,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:22:59,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:22:59,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:22:59,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:22:59,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:22:59,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:22:59,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:22:59,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:22:59,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:22:59,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:22:59,738 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:22:59,796 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:22:59,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:22:59,798 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:22:59,799 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:22:59,799 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:22:59,799 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:22:59,800 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:22:59,800 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:22:59,800 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:22:59,801 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:22:59,802 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:22:59,802 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:22:59,803 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:22:59,803 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:22:59,803 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:22:59,804 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:22:59,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:22:59,805 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:22:59,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:22:59,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:22:59,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:22:59,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:22:59,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:22:59,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:22:59,807 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:22:59,807 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:22:59,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:22:59,808 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:22:59,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:22:59,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:22:59,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:22:59,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:22:59,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:22:59,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:22:59,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:22:59,813 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:22:59,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:22:59,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:22:59,814 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:22:59,814 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:22:59,814 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_f59b3f79-52e1-4488-a785-8d6e79bf32fa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a [2021-11-12 23:23:00,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:23:00,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:23:00,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:23:00,153 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:23:00,154 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:23:00,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-12 23:23:00,228 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/data/a38cb9551/8d2ef257f18b4f118e1fc6c061250dd8/FLAGa50ae9a32 [2021-11-12 23:23:00,990 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:23:00,991 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-12 23:23:01,035 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/data/a38cb9551/8d2ef257f18b4f118e1fc6c061250dd8/FLAGa50ae9a32 [2021-11-12 23:23:01,150 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/data/a38cb9551/8d2ef257f18b4f118e1fc6c061250dd8 [2021-11-12 23:23:01,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:23:01,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:23:01,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:23:01,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:23:01,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:23:01,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:23:01" (1/1) ... [2021-11-12 23:23:01,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b6bdf7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:01, skipping insertion in model container [2021-11-12 23:23:01,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:23:01" (1/1) ... [2021-11-12 23:23:01,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:23:01,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:23:01,843 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_f59b3f79-52e1-4488-a785-8d6e79bf32fa/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-12 23:23:02,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:23:02,038 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:23:02,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@73722f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:02, skipping insertion in model container [2021-11-12 23:23:02,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:23:02,040 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:23:02,043 INFO L158 Benchmark]: Toolchain (without parser) took 883.88ms. Allocated memory is still 111.1MB. Free memory was 79.2MB in the beginning and 71.7MB in the end (delta: 7.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:23:02,045 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 111.1MB. Free memory is still 65.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:23:02,047 INFO L158 Benchmark]: CACSL2BoogieTranslator took 877.96ms. Allocated memory is still 111.1MB. Free memory was 78.9MB in the beginning and 71.7MB in the end (delta: 7.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:23:02,050 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 111.1MB. Free memory is still 65.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 877.96ms. Allocated memory is still 111.1MB. Free memory was 78.9MB in the beginning and 71.7MB in the end (delta: 7.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2888]: 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_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/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_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/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_f59b3f79-52e1-4488-a785-8d6e79bf32fa/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 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:23:04,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:23:04,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:23:04,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:23:04,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:23:04,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:23:04,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:23:04,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:23:04,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:23:04,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:23:04,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:23:04,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:23:04,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:23:04,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:23:04,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:23:04,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:23:04,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:23:04,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:23:04,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:23:04,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:23:04,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:23:04,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:23:04,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:23:04,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:23:04,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:23:04,928 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:23:04,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:23:04,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:23:04,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:23:04,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:23:04,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:23:04,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:23:04,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:23:04,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:23:04,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:23:04,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:23:04,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:23:04,943 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:23:04,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:23:04,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:23:04,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:23:04,948 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:23:05,004 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:23:05,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:23:05,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:23:05,007 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:23:05,007 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:23:05,008 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:23:05,008 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:23:05,008 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:23:05,009 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:23:05,009 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:23:05,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:23:05,012 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:23:05,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:23:05,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:23:05,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:23:05,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:23:05,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:23:05,014 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:23:05,014 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:23:05,015 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:23:05,015 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:23:05,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:23:05,015 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:23:05,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:23:05,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:23:05,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:23:05,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:23:05,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:23:05,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:23:05,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:23:05,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:23:05,018 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:23:05,019 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:23:05,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:23:05,019 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:23:05,020 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:23:05,020 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_f59b3f79-52e1-4488-a785-8d6e79bf32fa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a [2021-11-12 23:23:05,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:23:05,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:23:05,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:23:05,544 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:23:05,546 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:23:05,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-12 23:23:05,635 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/data/a83b89faf/9eff9848fb294a1a87c9f4ccc15c2dcc/FLAGe77fc5850 [2021-11-12 23:23:06,549 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:23:06,549 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-12 23:23:06,578 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/data/a83b89faf/9eff9848fb294a1a87c9f4ccc15c2dcc/FLAGe77fc5850 [2021-11-12 23:23:06,659 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/data/a83b89faf/9eff9848fb294a1a87c9f4ccc15c2dcc [2021-11-12 23:23:06,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:23:06,664 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:23:06,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:23:06,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:23:06,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:23:06,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:23:06" (1/1) ... [2021-11-12 23:23:06,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a450f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:06, skipping insertion in model container [2021-11-12 23:23:06,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:23:06" (1/1) ... [2021-11-12 23:23:06,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:23:06,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:23:07,286 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_f59b3f79-52e1-4488-a785-8d6e79bf32fa/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-12 23:23:07,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:23:07,550 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:23:07,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:23:07,690 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_f59b3f79-52e1-4488-a785-8d6e79bf32fa/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-12 23:23:07,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:23:07,744 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:23:07,805 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_f59b3f79-52e1-4488-a785-8d6e79bf32fa/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-12 23:23:07,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:23:07,909 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:23:07,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:07 WrapperNode [2021-11-12 23:23:07,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:23:07,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:23:07,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:23:07,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:23:07,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:07" (1/1) ... [2021-11-12 23:23:07,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:07" (1/1) ... [2021-11-12 23:23:08,100 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:23:08,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:23:08,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:23:08,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:23:08,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:07" (1/1) ... [2021-11-12 23:23:08,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:07" (1/1) ... [2021-11-12 23:23:08,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:07" (1/1) ... [2021-11-12 23:23:08,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:07" (1/1) ... [2021-11-12 23:23:08,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:07" (1/1) ... [2021-11-12 23:23:08,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:07" (1/1) ... [2021-11-12 23:23:08,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:07" (1/1) ... [2021-11-12 23:23:08,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:23:08,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:23:08,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:23:08,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:23:08,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:07" (1/1) ... [2021-11-12 23:23:08,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:23:08,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:08,286 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:23:08,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:23:08,340 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 23:23:08,344 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 23:23:08,344 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:23:08,344 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:23:08,345 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:23:08,345 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:23:08,345 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:23:08,345 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:23:08,345 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:23:08,345 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:23:08,345 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:23:08,345 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:23:08,346 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:23:08,346 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:23:08,346 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:23:08,346 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:23:08,346 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:23:08,346 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:23:08,346 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:23:08,346 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:23:08,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:23:08,346 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 23:23:08,347 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 23:23:08,347 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:23:08,347 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:23:08,347 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:23:08,347 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:23:08,347 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 23:23:08,347 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 23:23:08,347 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:23:08,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:23:08,347 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:23:08,347 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:23:08,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:23:08,348 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:23:08,348 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:23:08,348 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 23:23:08,348 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 23:23:08,348 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:23:08,348 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:23:08,348 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:23:08,348 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:23:08,348 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:23:08,349 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:23:08,349 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:23:08,349 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:23:08,349 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:23:08,349 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:23:08,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:23:08,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:23:08,349 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:23:08,349 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:23:08,349 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-12 23:23:08,350 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-12 23:23:12,727 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:23:12,727 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:23:12,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:23:12 BoogieIcfgContainer [2021-11-12 23:23:12,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:23:12,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:23:12,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:23:12,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:23:12,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:23:06" (1/3) ... [2021-11-12 23:23:12,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c40f47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:23:12, skipping insertion in model container [2021-11-12 23:23:12,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:07" (2/3) ... [2021-11-12 23:23:12,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c40f47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:23:12, skipping insertion in model container [2021-11-12 23:23:12,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:23:12" (3/3) ... [2021-11-12 23:23:12,744 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product28.cil.c [2021-11-12 23:23:12,752 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:23:12,752 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:23:12,840 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:23:12,854 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:23:12,854 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:23:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand has 578 states, 452 states have (on average 1.6880530973451326) internal successors, (763), 475 states have internal predecessors, (763), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-12 23:23:12,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 23:23:12,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:12,950 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:12,950 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:12,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:12,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1274281264, now seen corresponding path program 1 times [2021-11-12 23:23:12,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:12,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540655078] [2021-11-12 23:23:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:12,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:12,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:12,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:13,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:23:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:13,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:23:13,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:13,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:14,200 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:14,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540655078] [2021-11-12 23:23:14,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540655078] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:14,201 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:14,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:23:14,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591232780] [2021-11-12 23:23:14,208 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:14,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:23:14,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:14,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:23:14,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:23:14,282 INFO L87 Difference]: Start difference. First operand has 578 states, 452 states have (on average 1.6880530973451326) internal successors, (763), 475 states have internal predecessors, (763), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-12 23:23:14,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:14,377 INFO L93 Difference]: Finished difference Result 599 states and 991 transitions. [2021-11-12 23:23:14,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:23:14,380 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 60 [2021-11-12 23:23:14,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:14,443 INFO L225 Difference]: With dead ends: 599 [2021-11-12 23:23:14,445 INFO L226 Difference]: Without dead ends: 570 [2021-11-12 23:23:14,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 118 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 23:23:14,457 INFO L933 BasicCegarLoop]: 952 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, 952 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.44ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:14,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 9.44ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:23:14,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-12 23:23:14,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2021-11-12 23:23:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 446 states have (on average 1.6860986547085202) internal successors, (752), 467 states have internal predecessors, (752), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:23:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 945 transitions. [2021-11-12 23:23:14,610 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 945 transitions. Word has length 60 [2021-11-12 23:23:14,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:14,613 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 945 transitions. [2021-11-12 23:23:14,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-12 23:23:14,613 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 945 transitions. [2021-11-12 23:23:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 23:23:14,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:14,619 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:14,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:14,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:14,837 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:14,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:14,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1482839356, now seen corresponding path program 1 times [2021-11-12 23:23:14,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:14,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735158838] [2021-11-12 23:23:14,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:14,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:14,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:14,843 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:14,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:23:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:15,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:23:15,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:15,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:16,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:16,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735158838] [2021-11-12 23:23:16,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735158838] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:16,023 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:16,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:23:16,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877808780] [2021-11-12 23:23:16,030 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:16,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:23:16,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:16,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:23:16,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:23:16,035 INFO L87 Difference]: Start difference. First operand 570 states and 945 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:23:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:16,275 INFO L93 Difference]: Finished difference Result 1124 states and 1868 transitions. [2021-11-12 23:23:16,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:23:16,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 62 [2021-11-12 23:23:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:16,288 INFO L225 Difference]: With dead ends: 1124 [2021-11-12 23:23:16,288 INFO L226 Difference]: Without dead ends: 570 [2021-11-12 23:23:16,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:23:16,301 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 15 mSDsluCounter, 2789 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3721 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.01ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:16,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 3721 Invalid, 43 Unknown, 0 Unchecked, 36.01ms Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 53.19ms Time] [2021-11-12 23:23:16,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-12 23:23:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2021-11-12 23:23:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 446 states have (on average 1.6726457399103138) internal successors, (746), 467 states have internal predecessors, (746), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:23:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 939 transitions. [2021-11-12 23:23:16,397 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 939 transitions. Word has length 62 [2021-11-12 23:23:16,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:16,398 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 939 transitions. [2021-11-12 23:23:16,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:23:16,398 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 939 transitions. [2021-11-12 23:23:16,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:23:16,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:16,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:16,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:16,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:16,625 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:16,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:16,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1686384446, now seen corresponding path program 1 times [2021-11-12 23:23:16,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:16,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225055046] [2021-11-12 23:23:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:16,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:16,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:16,630 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:16,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:23:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:17,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:23:17,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:17,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:17,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:17,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225055046] [2021-11-12 23:23:17,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225055046] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:17,965 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:17,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:23:17,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628061656] [2021-11-12 23:23:17,966 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:17,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:23:17,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:17,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:23:17,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:23:17,974 INFO L87 Difference]: Start difference. First operand 570 states and 939 transitions. Second operand has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:23:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:18,201 INFO L93 Difference]: Finished difference Result 1082 states and 1785 transitions. [2021-11-12 23:23:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:23:18,203 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 67 [2021-11-12 23:23:18,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:18,212 INFO L225 Difference]: With dead ends: 1082 [2021-11-12 23:23:18,212 INFO L226 Difference]: Without dead ends: 564 [2021-11-12 23:23:18,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:23:18,223 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 214 mSDsluCounter, 4609 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 5535 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.90ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 111.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:18,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 5535 Invalid, 79 Unknown, 0 Unchecked, 17.90ms Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 111.56ms Time] [2021-11-12 23:23:18,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-12 23:23:18,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2021-11-12 23:23:18,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 440 states have (on average 1.665909090909091) internal successors, (733), 461 states have internal predecessors, (733), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:23:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 926 transitions. [2021-11-12 23:23:18,284 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 926 transitions. Word has length 67 [2021-11-12 23:23:18,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:18,287 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 926 transitions. [2021-11-12 23:23:18,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:23:18,288 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 926 transitions. [2021-11-12 23:23:18,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:23:18,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:18,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:18,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-12 23:23:18,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:18,517 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:18,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:18,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1638465115, now seen corresponding path program 1 times [2021-11-12 23:23:18,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:18,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538873348] [2021-11-12 23:23:18,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:18,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:18,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:18,526 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:18,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:23:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:19,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:23:19,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:19,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:19,586 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:19,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538873348] [2021-11-12 23:23:19,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538873348] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:19,587 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:19,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:23:19,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405481730] [2021-11-12 23:23:19,587 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:19,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:23:19,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:19,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:23:19,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:23:19,589 INFO L87 Difference]: Start difference. First operand 564 states and 926 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:23:19,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:19,811 INFO L93 Difference]: Finished difference Result 1085 states and 1786 transitions. [2021-11-12 23:23:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:23:19,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2021-11-12 23:23:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:19,819 INFO L225 Difference]: With dead ends: 1085 [2021-11-12 23:23:19,820 INFO L226 Difference]: Without dead ends: 564 [2021-11-12 23:23:19,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:23:19,825 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 215 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 116.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.81ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.15ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:19,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 1765 Invalid, 122 Unknown, 0 Unchecked, 11.81ms Time], IncrementalHoareTripleChecker [26 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 142.15ms Time] [2021-11-12 23:23:19,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-12 23:23:19,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2021-11-12 23:23:19,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 440 states have (on average 1.6113636363636363) internal successors, (709), 461 states have internal predecessors, (709), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:23:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 902 transitions. [2021-11-12 23:23:19,862 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 902 transitions. Word has length 68 [2021-11-12 23:23:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:19,863 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 902 transitions. [2021-11-12 23:23:19,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:23:19,863 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 902 transitions. [2021-11-12 23:23:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 23:23:19,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:19,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:19,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:20,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:20,087 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:20,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:20,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1867098464, now seen corresponding path program 1 times [2021-11-12 23:23:20,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:20,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378315789] [2021-11-12 23:23:20,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:20,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:20,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:20,091 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:20,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:23:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:20,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:23:20,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:20,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:21,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:21,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378315789] [2021-11-12 23:23:21,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378315789] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:21,344 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:21,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:23:21,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565888266] [2021-11-12 23:23:21,345 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:21,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:23:21,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:21,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:23:21,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:23:21,347 INFO L87 Difference]: Start difference. First operand 564 states and 902 transitions. Second operand has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:23:21,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:21,539 INFO L93 Difference]: Finished difference Result 1076 states and 1748 transitions. [2021-11-12 23:23:21,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:23:21,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2021-11-12 23:23:21,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:21,547 INFO L225 Difference]: With dead ends: 1076 [2021-11-12 23:23:21,548 INFO L226 Difference]: Without dead ends: 543 [2021-11-12 23:23:21,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:23:21,552 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 89 mSDsluCounter, 5239 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 94.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 6129 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 111.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:21,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 6129 Invalid, 60 Unknown, 0 Unchecked, 17.32ms Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 111.73ms Time] [2021-11-12 23:23:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-12 23:23:21,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2021-11-12 23:23:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 419 states have (on average 1.6324582338902147) internal successors, (684), 440 states have internal predecessors, (684), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:23:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 877 transitions. [2021-11-12 23:23:21,584 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 877 transitions. Word has length 70 [2021-11-12 23:23:21,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:21,585 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 877 transitions. [2021-11-12 23:23:21,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:23:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 877 transitions. [2021-11-12 23:23:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:23:21,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:21,587 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:21,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:21,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:21,809 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:21,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:21,809 INFO L85 PathProgramCache]: Analyzing trace with hash -79778101, now seen corresponding path program 1 times [2021-11-12 23:23:21,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:21,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263805182] [2021-11-12 23:23:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:21,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:21,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:21,811 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:21,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:23:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:22,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:23:22,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:22,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:23,177 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:23,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263805182] [2021-11-12 23:23:23,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263805182] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:23,177 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:23,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:23:23,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751819968] [2021-11-12 23:23:23,178 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:23,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:23:23,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:23,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:23:23,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:23:23,179 INFO L87 Difference]: Start difference. First operand 543 states and 877 transitions. Second operand has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:23:23,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:23,406 INFO L93 Difference]: Finished difference Result 1049 states and 1712 transitions. [2021-11-12 23:23:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:23:23,407 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 73 [2021-11-12 23:23:23,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:23,414 INFO L225 Difference]: With dead ends: 1049 [2021-11-12 23:23:23,414 INFO L226 Difference]: Without dead ends: 543 [2021-11-12 23:23:23,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:23:23,419 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 46 mSDsluCounter, 5157 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6019 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.76ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 121.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:23,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 6019 Invalid, 88 Unknown, 0 Unchecked, 15.76ms Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 121.40ms Time] [2021-11-12 23:23:23,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-12 23:23:23,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2021-11-12 23:23:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 419 states have (on average 1.630071599045346) internal successors, (683), 440 states have internal predecessors, (683), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:23:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 876 transitions. [2021-11-12 23:23:23,451 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 876 transitions. Word has length 73 [2021-11-12 23:23:23,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:23,452 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 876 transitions. [2021-11-12 23:23:23,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:23:23,452 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 876 transitions. [2021-11-12 23:23:23,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 23:23:23,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:23,454 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:23,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:23,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:23,674 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:23,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:23,675 INFO L85 PathProgramCache]: Analyzing trace with hash -688964934, now seen corresponding path program 1 times [2021-11-12 23:23:23,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:23,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363101431] [2021-11-12 23:23:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:23,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:23,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:23,677 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:23,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:23:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:24,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:23:24,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:25,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:25,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:25,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363101431] [2021-11-12 23:23:25,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363101431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:25,562 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:25,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-12 23:23:25,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822141028] [2021-11-12 23:23:25,562 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:25,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:23:25,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:25,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:23:25,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:23:25,564 INFO L87 Difference]: Start difference. First operand 543 states and 876 transitions. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-12 23:23:27,603 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:38,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:38,971 INFO L93 Difference]: Finished difference Result 2735 states and 4547 transitions. [2021-11-12 23:23:38,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:23:38,972 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) Word has length 74 [2021-11-12 23:23:38,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:38,998 INFO L225 Difference]: With dead ends: 2735 [2021-11-12 23:23:38,998 INFO L226 Difference]: Without dead ends: 2237 [2021-11-12 23:23:39,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:23:39,008 INFO L933 BasicCegarLoop]: 1571 mSDtfsCounter, 5387 mSDsluCounter, 2146 mSDsCounter, 0 mSdLazyCounter, 6257 mSolverCounterSat, 1385 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11285.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5571 SdHoareTripleChecker+Valid, 3717 SdHoareTripleChecker+Invalid, 7643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 73.18ms SdHoareTripleChecker+Time, 1385 IncrementalHoareTripleChecker+Valid, 6257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12896.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:39,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5571 Valid, 3717 Invalid, 7643 Unknown, 0 Unchecked, 73.18ms Time], IncrementalHoareTripleChecker [1385 Valid, 6257 Invalid, 1 Unknown, 0 Unchecked, 12896.19ms Time] [2021-11-12 23:23:39,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-11-12 23:23:39,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2049. [2021-11-12 23:23:39,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 1572 states have (on average 1.6622137404580153) internal successors, (2613), 1637 states have internal predecessors, (2613), 395 states have call successors, (395), 78 states have call predecessors, (395), 81 states have return successors, (403), 360 states have call predecessors, (403), 390 states have call successors, (403) [2021-11-12 23:23:39,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 3411 transitions. [2021-11-12 23:23:39,210 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 3411 transitions. Word has length 74 [2021-11-12 23:23:39,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:39,212 INFO L470 AbstractCegarLoop]: Abstraction has 2049 states and 3411 transitions. [2021-11-12 23:23:39,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-12 23:23:39,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 3411 transitions. [2021-11-12 23:23:39,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:23:39,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:39,226 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:39,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:39,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:39,445 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:39,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:39,446 INFO L85 PathProgramCache]: Analyzing trace with hash 2061681991, now seen corresponding path program 1 times [2021-11-12 23:23:39,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:39,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737431611] [2021-11-12 23:23:39,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:39,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:39,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:39,450 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:39,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:23:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:40,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:23:40,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:40,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:41,180 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:41,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737431611] [2021-11-12 23:23:41,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737431611] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:41,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:23:41,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:23:41,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773928710] [2021-11-12 23:23:41,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:41,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:23:41,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:41,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:23:41,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:23:41,183 INFO L87 Difference]: Start difference. First operand 2049 states and 3411 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:23:43,217 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:45,227 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:46,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:46,491 INFO L93 Difference]: Finished difference Result 4069 states and 6894 transitions. [2021-11-12 23:23:46,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:23:46,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 127 [2021-11-12 23:23:46,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:46,517 INFO L225 Difference]: With dead ends: 4069 [2021-11-12 23:23:46,517 INFO L226 Difference]: Without dead ends: 2065 [2021-11-12 23:23:46,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:23:46,542 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 806 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4963.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 2181 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.96ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5117.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:46,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 2181 Invalid, 449 Unknown, 0 Unchecked, 10.96ms Time], IncrementalHoareTripleChecker [16 Valid, 431 Invalid, 2 Unknown, 0 Unchecked, 5117.26ms Time] [2021-11-12 23:23:46,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2021-11-12 23:23:46,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 2065. [2021-11-12 23:23:46,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 1584 states have (on average 1.6571969696969697) internal successors, (2625), 1649 states have internal predecessors, (2625), 395 states have call successors, (395), 82 states have call predecessors, (395), 85 states have return successors, (407), 360 states have call predecessors, (407), 390 states have call successors, (407) [2021-11-12 23:23:46,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3427 transitions. [2021-11-12 23:23:46,718 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3427 transitions. Word has length 127 [2021-11-12 23:23:46,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:46,719 INFO L470 AbstractCegarLoop]: Abstraction has 2065 states and 3427 transitions. [2021-11-12 23:23:46,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:23:46,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3427 transitions. [2021-11-12 23:23:46,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 23:23:46,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:46,725 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:46,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:46,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:46,952 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:46,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:46,953 INFO L85 PathProgramCache]: Analyzing trace with hash 828809680, now seen corresponding path program 1 times [2021-11-12 23:23:46,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:46,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378314612] [2021-11-12 23:23:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:46,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:46,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:46,955 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:46,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:23:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:47,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:23:47,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:23:48,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:23:48,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:48,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378314612] [2021-11-12 23:23:48,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378314612] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:48,817 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:48,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:23:48,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901429854] [2021-11-12 23:23:48,818 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:48,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:23:48,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:48,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:23:48,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:23:48,820 INFO L87 Difference]: Start difference. First operand 2065 states and 3427 transitions. Second operand has 13 states, 13 states have (on average 9.76923076923077) internal successors, (127), 11 states have internal predecessors, (127), 7 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-12 23:23:50,855 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:52,861 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:54,867 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:07,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:07,553 INFO L93 Difference]: Finished difference Result 5493 states and 9106 transitions. [2021-11-12 23:24:07,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 23:24:07,554 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.76923076923077) internal successors, (127), 11 states have internal predecessors, (127), 7 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 128 [2021-11-12 23:24:07,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:07,595 INFO L225 Difference]: With dead ends: 5493 [2021-11-12 23:24:07,595 INFO L226 Difference]: Without dead ends: 3473 [2021-11-12 23:24:07,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-12 23:24:07,617 INFO L933 BasicCegarLoop]: 1788 mSDtfsCounter, 3215 mSDsluCounter, 3904 mSDsCounter, 0 mSdLazyCounter, 8373 mSolverCounterSat, 1133 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16290.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3305 SdHoareTripleChecker+Valid, 5692 SdHoareTripleChecker+Invalid, 9509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 80.78ms SdHoareTripleChecker+Time, 1133 IncrementalHoareTripleChecker+Valid, 8373 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17820.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:07,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3305 Valid, 5692 Invalid, 9509 Unknown, 0 Unchecked, 80.78ms Time], IncrementalHoareTripleChecker [1133 Valid, 8373 Invalid, 3 Unknown, 0 Unchecked, 17820.05ms Time] [2021-11-12 23:24:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3473 states. [2021-11-12 23:24:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3473 to 3001. [2021-11-12 23:24:07,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3001 states, 2242 states have (on average 1.6119536128456735) internal successors, (3614), 2333 states have internal predecessors, (3614), 621 states have call successors, (621), 121 states have call predecessors, (621), 137 states have return successors, (663), 579 states have call predecessors, (663), 616 states have call successors, (663) [2021-11-12 23:24:07,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3001 states to 3001 states and 4898 transitions. [2021-11-12 23:24:07,927 INFO L78 Accepts]: Start accepts. Automaton has 3001 states and 4898 transitions. Word has length 128 [2021-11-12 23:24:07,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:07,929 INFO L470 AbstractCegarLoop]: Abstraction has 3001 states and 4898 transitions. [2021-11-12 23:24:07,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.76923076923077) internal successors, (127), 11 states have internal predecessors, (127), 7 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-12 23:24:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3001 states and 4898 transitions. [2021-11-12 23:24:07,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-12 23:24:07,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:07,936 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:07,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:08,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:08,152 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:08,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:08,153 INFO L85 PathProgramCache]: Analyzing trace with hash 2041046293, now seen corresponding path program 1 times [2021-11-12 23:24:08,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:08,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175038470] [2021-11-12 23:24:08,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:08,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:08,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:08,156 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:08,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:24:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:08,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:24:08,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:09,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:09,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:09,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175038470] [2021-11-12 23:24:09,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175038470] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:09,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:09,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:24:09,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758706566] [2021-11-12 23:24:09,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:09,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:24:09,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:09,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:24:09,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:24:09,900 INFO L87 Difference]: Start difference. First operand 3001 states and 4898 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:24:11,939 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:13,945 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:15,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:15,176 INFO L93 Difference]: Finished difference Result 6007 states and 9976 transitions. [2021-11-12 23:24:15,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:24:15,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 129 [2021-11-12 23:24:15,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:15,208 INFO L225 Difference]: With dead ends: 6007 [2021-11-12 23:24:15,208 INFO L226 Difference]: Without dead ends: 3051 [2021-11-12 23:24:15,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:24:15,236 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 806 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4893.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.00ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5045.48ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:15,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 2182 Invalid, 451 Unknown, 0 Unchecked, 7.00ms Time], IncrementalHoareTripleChecker [14 Valid, 435 Invalid, 2 Unknown, 0 Unchecked, 5045.48ms Time] [2021-11-12 23:24:15,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-11-12 23:24:15,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 3051. [2021-11-12 23:24:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3051 states, 2282 states have (on average 1.6012269938650308) internal successors, (3654), 2373 states have internal predecessors, (3654), 621 states have call successors, (621), 131 states have call predecessors, (621), 147 states have return successors, (669), 579 states have call predecessors, (669), 616 states have call successors, (669) [2021-11-12 23:24:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3051 states to 3051 states and 4944 transitions. [2021-11-12 23:24:15,568 INFO L78 Accepts]: Start accepts. Automaton has 3051 states and 4944 transitions. Word has length 129 [2021-11-12 23:24:15,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:15,569 INFO L470 AbstractCegarLoop]: Abstraction has 3051 states and 4944 transitions. [2021-11-12 23:24:15,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:24:15,569 INFO L276 IsEmpty]: Start isEmpty. Operand 3051 states and 4944 transitions. [2021-11-12 23:24:15,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 23:24:15,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:15,577 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:15,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:15,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:15,792 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:15,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:15,793 INFO L85 PathProgramCache]: Analyzing trace with hash 677248839, now seen corresponding path program 1 times [2021-11-12 23:24:15,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:15,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613520846] [2021-11-12 23:24:15,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:15,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:15,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:15,796 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:15,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:24:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:16,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:24:16,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:16,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:17,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:17,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613520846] [2021-11-12 23:24:17,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613520846] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:17,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:17,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:24:17,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637007520] [2021-11-12 23:24:17,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:17,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:24:17,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:17,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:24:17,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:24:17,620 INFO L87 Difference]: Start difference. First operand 3051 states and 4944 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:24:19,655 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:21,661 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:22,730 INFO L93 Difference]: Finished difference Result 6117 states and 10068 transitions. [2021-11-12 23:24:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:24:22,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 131 [2021-11-12 23:24:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:22,766 INFO L225 Difference]: With dead ends: 6117 [2021-11-12 23:24:22,767 INFO L226 Difference]: Without dead ends: 3111 [2021-11-12 23:24:22,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:24:22,800 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 804 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4754.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.10ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4889.51ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:22,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 2182 Invalid, 450 Unknown, 0 Unchecked, 6.10ms Time], IncrementalHoareTripleChecker [12 Valid, 436 Invalid, 2 Unknown, 0 Unchecked, 4889.51ms Time] [2021-11-12 23:24:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-11-12 23:24:23,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 3111. [2021-11-12 23:24:23,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 2332 states have (on average 1.588336192109777) internal successors, (3704), 2423 states have internal predecessors, (3704), 621 states have call successors, (621), 141 states have call predecessors, (621), 157 states have return successors, (675), 579 states have call predecessors, (675), 616 states have call successors, (675) [2021-11-12 23:24:23,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 5000 transitions. [2021-11-12 23:24:23,080 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 5000 transitions. Word has length 131 [2021-11-12 23:24:23,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:23,080 INFO L470 AbstractCegarLoop]: Abstraction has 3111 states and 5000 transitions. [2021-11-12 23:24:23,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:24:23,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 5000 transitions. [2021-11-12 23:24:23,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 23:24:23,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:23,089 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:23,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:23,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:23,307 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:23,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:23,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1165257971, now seen corresponding path program 1 times [2021-11-12 23:24:23,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:23,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774724724] [2021-11-12 23:24:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:23,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:23,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:23,311 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:23,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:24:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:24,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:24:24,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:24,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:25,186 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:25,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774724724] [2021-11-12 23:24:25,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774724724] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:25,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:25,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:24:25,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693444957] [2021-11-12 23:24:25,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:25,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:24:25,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:25,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:24:25,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:24:25,189 INFO L87 Difference]: Start difference. First operand 3111 states and 5000 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:24:27,224 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:29,231 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:30,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:30,270 INFO L93 Difference]: Finished difference Result 6247 states and 10180 transitions. [2021-11-12 23:24:30,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:24:30,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 133 [2021-11-12 23:24:30,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:30,295 INFO L225 Difference]: With dead ends: 6247 [2021-11-12 23:24:30,295 INFO L226 Difference]: Without dead ends: 3181 [2021-11-12 23:24:30,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:24:30,331 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 813 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4795.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.09ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4926.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:30,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 2182 Invalid, 449 Unknown, 0 Unchecked, 6.09ms Time], IncrementalHoareTripleChecker [10 Valid, 437 Invalid, 2 Unknown, 0 Unchecked, 4926.17ms Time] [2021-11-12 23:24:30,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-11-12 23:24:30,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 3181. [2021-11-12 23:24:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3181 states, 2392 states have (on average 1.5735785953177257) internal successors, (3764), 2483 states have internal predecessors, (3764), 621 states have call successors, (621), 151 states have call predecessors, (621), 167 states have return successors, (681), 579 states have call predecessors, (681), 616 states have call successors, (681) [2021-11-12 23:24:30,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3181 states to 3181 states and 5066 transitions. [2021-11-12 23:24:30,537 INFO L78 Accepts]: Start accepts. Automaton has 3181 states and 5066 transitions. Word has length 133 [2021-11-12 23:24:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:30,538 INFO L470 AbstractCegarLoop]: Abstraction has 3181 states and 5066 transitions. [2021-11-12 23:24:30,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:24:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3181 states and 5066 transitions. [2021-11-12 23:24:30,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-12 23:24:30,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:30,546 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:30,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:30,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:30,767 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:30,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:30,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1462667079, now seen corresponding path program 1 times [2021-11-12 23:24:30,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:30,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225839489] [2021-11-12 23:24:30,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:30,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:30,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:30,769 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:30,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:24:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:31,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:24:31,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:24:31,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:24:32,905 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:32,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225839489] [2021-11-12 23:24:32,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225839489] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:32,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1527493148] [2021-11-12 23:24:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:32,906 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:24:32,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:24:32,907 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:24:32,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 23:24:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:33,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:24:33,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:24:33,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:24:34,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1527493148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:34,157 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:24:34,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 23:24:34,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989595688] [2021-11-12 23:24:34,157 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:34,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:24:34,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:34,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:24:34,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:24:34,159 INFO L87 Difference]: Start difference. First operand 3181 states and 5066 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:24:36,179 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:38,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:38,631 INFO L93 Difference]: Finished difference Result 8682 states and 14071 transitions. [2021-11-12 23:24:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:24:38,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 135 [2021-11-12 23:24:38,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:38,676 INFO L225 Difference]: With dead ends: 8682 [2021-11-12 23:24:38,677 INFO L226 Difference]: Without dead ends: 5546 [2021-11-12 23:24:38,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:24:38,721 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 1918 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 437 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3890.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1996 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.87ms SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4209.83ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:38,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1996 Valid, 1606 Invalid, 1410 Unknown, 0 Unchecked, 12.87ms Time], IncrementalHoareTripleChecker [437 Valid, 972 Invalid, 1 Unknown, 0 Unchecked, 4209.83ms Time] [2021-11-12 23:24:38,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-11-12 23:24:39,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 5313. [2021-11-12 23:24:39,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 3939 states have (on average 1.5686722518405687) internal successors, (6179), 4114 states have internal predecessors, (6179), 1094 states have call successors, (1094), 237 states have call predecessors, (1094), 279 states have return successors, (1296), 1042 states have call predecessors, (1296), 1089 states have call successors, (1296) [2021-11-12 23:24:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 8569 transitions. [2021-11-12 23:24:39,133 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 8569 transitions. Word has length 135 [2021-11-12 23:24:39,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:39,133 INFO L470 AbstractCegarLoop]: Abstraction has 5313 states and 8569 transitions. [2021-11-12 23:24:39,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:24:39,134 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 8569 transitions. [2021-11-12 23:24:39,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 23:24:39,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:39,140 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:39,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:39,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:39,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:39,547 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:39,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:39,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1902241725, now seen corresponding path program 1 times [2021-11-12 23:24:39,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:39,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604990016] [2021-11-12 23:24:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:39,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:39,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:39,551 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:39,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:24:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:40,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:24:40,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:24:40,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:24:41,845 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:41,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604990016] [2021-11-12 23:24:41,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604990016] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:41,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2113227662] [2021-11-12 23:24:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:41,845 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:24:41,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:24:41,848 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:24:41,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 23:24:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:42,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:24:42,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:42,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:24:42,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:24:43,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2113227662] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:43,173 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:24:43,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 23:24:43,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320963502] [2021-11-12 23:24:43,174 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:43,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:24:43,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:43,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:24:43,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:24:43,176 INFO L87 Difference]: Start difference. First operand 5313 states and 8569 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:24:45,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:47,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:47,683 INFO L93 Difference]: Finished difference Result 15802 states and 26268 transitions. [2021-11-12 23:24:47,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:24:47,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 136 [2021-11-12 23:24:47,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:47,744 INFO L225 Difference]: With dead ends: 15802 [2021-11-12 23:24:47,744 INFO L226 Difference]: Without dead ends: 10534 [2021-11-12 23:24:47,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:24:47,762 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 1922 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 441 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3697.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1999 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.32ms SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4016.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:47,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1999 Valid, 1552 Invalid, 1412 Unknown, 0 Unchecked, 11.32ms Time], IncrementalHoareTripleChecker [441 Valid, 970 Invalid, 1 Unknown, 0 Unchecked, 4016.93ms Time] [2021-11-12 23:24:47,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10534 states. [2021-11-12 23:24:48,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10534 to 10045. [2021-11-12 23:24:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10045 states, 7308 states have (on average 1.5622605363984674) internal successors, (11417), 7686 states have internal predecessors, (11417), 2213 states have call successors, (2213), 409 states have call predecessors, (2213), 523 states have return successors, (2968), 2153 states have call predecessors, (2968), 2208 states have call successors, (2968) [2021-11-12 23:24:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10045 states to 10045 states and 16598 transitions. [2021-11-12 23:24:48,530 INFO L78 Accepts]: Start accepts. Automaton has 10045 states and 16598 transitions. Word has length 136 [2021-11-12 23:24:48,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:48,531 INFO L470 AbstractCegarLoop]: Abstraction has 10045 states and 16598 transitions. [2021-11-12 23:24:48,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:24:48,531 INFO L276 IsEmpty]: Start isEmpty. Operand 10045 states and 16598 transitions. [2021-11-12 23:24:48,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 23:24:48,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:48,538 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:48,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-12 23:24:48,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:48,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:48,943 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:48,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:48,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1159771657, now seen corresponding path program 1 times [2021-11-12 23:24:48,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:48,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745314858] [2021-11-12 23:24:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:48,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:48,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:48,944 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:48,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:24:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:49,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:24:49,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:24:49,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:24:51,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:51,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745314858] [2021-11-12 23:24:51,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745314858] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:51,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1200588125] [2021-11-12 23:24:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:51,095 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:24:51,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:24:51,098 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:24:51,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 23:24:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:51,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:24:51,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:24:51,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:24:52,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1200588125] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:52,364 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:24:52,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 23:24:52,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097343977] [2021-11-12 23:24:52,364 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:52,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:24:52,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:52,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:24:52,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:24:52,366 INFO L87 Difference]: Start difference. First operand 10045 states and 16598 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:24:54,387 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:57,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:57,360 INFO L93 Difference]: Finished difference Result 31804 states and 55282 transitions. [2021-11-12 23:24:57,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:24:57,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 137 [2021-11-12 23:24:57,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:57,518 INFO L225 Difference]: With dead ends: 31804 [2021-11-12 23:24:57,519 INFO L226 Difference]: Without dead ends: 21804 [2021-11-12 23:24:57,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:24:57,568 INFO L933 BasicCegarLoop]: 908 mSDtfsCounter, 1910 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 444 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3622.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1986 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.02ms SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3921.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:57,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1986 Valid, 1560 Invalid, 1413 Unknown, 0 Unchecked, 11.02ms Time], IncrementalHoareTripleChecker [444 Valid, 968 Invalid, 1 Unknown, 0 Unchecked, 3921.78ms Time] [2021-11-12 23:24:57,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21804 states. [2021-11-12 23:24:59,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21804 to 20801. [2021-11-12 23:24:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20801 states, 14808 states have (on average 1.5544975688816856) internal successors, (23019), 15683 states have internal predecessors, (23019), 4929 states have call successors, (4929), 753 states have call predecessors, (4929), 1063 states have return successors, (7783), 4889 states have call predecessors, (7783), 4924 states have call successors, (7783) [2021-11-12 23:24:59,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20801 states to 20801 states and 35731 transitions. [2021-11-12 23:24:59,223 INFO L78 Accepts]: Start accepts. Automaton has 20801 states and 35731 transitions. Word has length 137 [2021-11-12 23:24:59,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:59,224 INFO L470 AbstractCegarLoop]: Abstraction has 20801 states and 35731 transitions. [2021-11-12 23:24:59,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:24:59,225 INFO L276 IsEmpty]: Start isEmpty. Operand 20801 states and 35731 transitions. [2021-11-12 23:24:59,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-12 23:24:59,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:59,232 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:59,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:59,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:59,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:24:59,659 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:59,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:59,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1592909893, now seen corresponding path program 1 times [2021-11-12 23:24:59,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:59,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917065948] [2021-11-12 23:24:59,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:59,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:59,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:59,662 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:59,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:25:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:00,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:25:00,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:25:00,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:25:01,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:01,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917065948] [2021-11-12 23:25:01,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917065948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:01,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [356077509] [2021-11-12 23:25:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:01,759 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:25:01,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:25:01,760 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:25:01,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 23:25:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:02,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:25:02,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:25:02,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:25:02,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [356077509] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:02,971 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:25:02,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 23:25:02,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265436951] [2021-11-12 23:25:02,972 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:02,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:25:02,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:02,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:25:02,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:25:02,973 INFO L87 Difference]: Start difference. First operand 20801 states and 35731 transitions. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:25:05,003 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:09,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:09,337 INFO L93 Difference]: Finished difference Result 68642 states and 128232 transitions. [2021-11-12 23:25:09,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:25:09,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 138 [2021-11-12 23:25:09,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:09,809 INFO L225 Difference]: With dead ends: 68642 [2021-11-12 23:25:09,809 INFO L226 Difference]: Without dead ends: 47886 [2021-11-12 23:25:10,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:25:10,188 INFO L933 BasicCegarLoop]: 913 mSDtfsCounter, 2487 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 620 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3640.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2562 SdHoareTripleChecker+Valid, 1443 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.80ms SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3910.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:10,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2562 Valid, 1443 Invalid, 1526 Unknown, 0 Unchecked, 10.80ms Time], IncrementalHoareTripleChecker [620 Valid, 905 Invalid, 1 Unknown, 0 Unchecked, 3910.56ms Time] [2021-11-12 23:25:10,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47886 states. [2021-11-12 23:25:13,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47886 to 45937. [2021-11-12 23:25:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45937 states, 31964 states have (on average 1.5457702415217118) internal successors, (49409), 34072 states have internal predecessors, (49409), 11689 states have call successors, (11689), 1441 states have call predecessors, (11689), 2283 states have return successors, (22500), 11797 states have call predecessors, (22500), 11684 states have call successors, (22500) [2021-11-12 23:25:14,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45937 states to 45937 states and 83598 transitions. [2021-11-12 23:25:14,620 INFO L78 Accepts]: Start accepts. Automaton has 45937 states and 83598 transitions. Word has length 138 [2021-11-12 23:25:14,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:14,621 INFO L470 AbstractCegarLoop]: Abstraction has 45937 states and 83598 transitions. [2021-11-12 23:25:14,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:25:14,622 INFO L276 IsEmpty]: Start isEmpty. Operand 45937 states and 83598 transitions. [2021-11-12 23:25:14,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 23:25:14,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:14,631 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:14,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:14,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-12 23:25:15,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:25:15,044 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:15,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:15,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2135297227, now seen corresponding path program 1 times [2021-11-12 23:25:15,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:15,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270035492] [2021-11-12 23:25:15,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:15,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:15,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:15,047 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:15,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:25:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:15,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:25:15,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:25:16,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:25:17,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:17,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270035492] [2021-11-12 23:25:17,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270035492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:17,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1000068256] [2021-11-12 23:25:17,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:17,125 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:25:17,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:25:17,131 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:25:17,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 23:25:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:17,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:25:17,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:25:17,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:25:18,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1000068256] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:18,365 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:25:18,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 23:25:18,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385830086] [2021-11-12 23:25:18,366 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:18,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:25:18,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:18,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:25:18,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:25:18,367 INFO L87 Difference]: Start difference. First operand 45937 states and 83598 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:25:20,397 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:29,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:29,376 INFO L93 Difference]: Finished difference Result 155630 states and 325397 transitions. [2021-11-12 23:25:29,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:25:29,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 139 [2021-11-12 23:25:29,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:30,719 INFO L225 Difference]: With dead ends: 155630 [2021-11-12 23:25:30,719 INFO L226 Difference]: Without dead ends: 109589 [2021-11-12 23:25:31,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:25:31,007 INFO L933 BasicCegarLoop]: 913 mSDtfsCounter, 2492 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 620 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3501.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2566 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.45ms SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3779.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:31,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2566 Valid, 1442 Invalid, 1523 Unknown, 0 Unchecked, 10.45ms Time], IncrementalHoareTripleChecker [620 Valid, 902 Invalid, 1 Unknown, 0 Unchecked, 3779.02ms Time] [2021-11-12 23:25:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109589 states. [2021-11-12 23:25:40,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109589 to 106281. [2021-11-12 23:25:40,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106281 states, 72313 states have (on average 1.5364180714394369) internal successors, (111103), 77514 states have internal predecessors, (111103), 28874 states have call successors, (28874), 2804 states have call predecessors, (28874), 5093 states have return successors, (70221), 29601 states have call predecessors, (70221), 28869 states have call successors, (70221) [2021-11-12 23:25:41,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106281 states to 106281 states and 210198 transitions. [2021-11-12 23:25:41,691 INFO L78 Accepts]: Start accepts. Automaton has 106281 states and 210198 transitions. Word has length 139 [2021-11-12 23:25:41,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:41,691 INFO L470 AbstractCegarLoop]: Abstraction has 106281 states and 210198 transitions. [2021-11-12 23:25:41,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:25:41,692 INFO L276 IsEmpty]: Start isEmpty. Operand 106281 states and 210198 transitions. [2021-11-12 23:25:41,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-12 23:25:41,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:41,720 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:41,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-12 23:25:41,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:42,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:42,132 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:42,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:42,133 INFO L85 PathProgramCache]: Analyzing trace with hash 463498933, now seen corresponding path program 1 times [2021-11-12 23:25:42,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:42,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645265749] [2021-11-12 23:25:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:42,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:42,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:42,140 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:42,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59b3f79-52e1-4488-a785-8d6e79bf32fa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:25:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:42,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:25:42,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 23:25:43,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 23:25:44,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:44,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645265749] [2021-11-12 23:25:44,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645265749] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:44,545 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:44,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-11-12 23:25:44,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052359383] [2021-11-12 23:25:44,545 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:44,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:25:44,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:44,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:25:44,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:25:44,547 INFO L87 Difference]: Start difference. First operand 106281 states and 210198 transitions. Second operand has 16 states, 16 states have (on average 9.75) internal successors, (156), 12 states have internal predecessors, (156), 6 states have call successors, (33), 4 states have call predecessors, (33), 8 states have return successors, (32), 10 states have call predecessors, (32), 5 states have call successors, (32) [2021-11-12 23:25:46,567 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:48,572 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:50,579 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:52,586 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:54,592 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []