./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product27.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_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/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_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/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_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/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 11bb1f05736dca729c358ce9b340534ff3d0ef3cd2b5d7b8f4dea43dade9112f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:06:43,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:06:43,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:06:43,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:06:43,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:06:43,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:06:43,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:06:43,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:06:43,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:06:43,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:06:43,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:06:43,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:06:43,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:06:43,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:06:43,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:06:44,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:06:44,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:06:44,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:06:44,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:06:44,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:06:44,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:06:44,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:06:44,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:06:44,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:06:44,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:06:44,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:06:44,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:06:44,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:06:44,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:06:44,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:06:44,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:06:44,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:06:44,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:06:44,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:06:44,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:06:44,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:06:44,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:06:44,053 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:06:44,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:06:44,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:06:44,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:06:44,056 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:06:44,110 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:06:44,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:06:44,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:06:44,112 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:06:44,112 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:06:44,113 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:06:44,113 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:06:44,113 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:06:44,120 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:06:44,120 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:06:44,121 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:06:44,122 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:06:44,122 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:06:44,122 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:06:44,122 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:06:44,122 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:06:44,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:06:44,123 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:06:44,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:06:44,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:06:44,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:06:44,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:06:44,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:06:44,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:06:44,125 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:06:44,125 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:06:44,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:06:44,126 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:06:44,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:06:44,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:06:44,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:06:44,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:06:44,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:06:44,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:06:44,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:06:44,129 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:06:44,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:06:44,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:06:44,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:06:44,130 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:06:44,130 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_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11bb1f05736dca729c358ce9b340534ff3d0ef3cd2b5d7b8f4dea43dade9112f [2021-11-12 23:06:44,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:06:44,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:06:44,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:06:44,512 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:06:44,513 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:06:44,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2021-11-12 23:06:44,592 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/data/d5819ec35/f33bed0bd80b400e82ce1333d784b9ea/FLAG41f20d7f9 [2021-11-12 23:06:45,260 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:06:45,261 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2021-11-12 23:06:45,322 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/data/d5819ec35/f33bed0bd80b400e82ce1333d784b9ea/FLAG41f20d7f9 [2021-11-12 23:06:45,475 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/data/d5819ec35/f33bed0bd80b400e82ce1333d784b9ea [2021-11-12 23:06:45,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:06:45,478 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:06:45,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:06:45,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:06:45,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:06:45,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:06:45" (1/1) ... [2021-11-12 23:06:45,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a173b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:45, skipping insertion in model container [2021-11-12 23:06:45,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:06:45" (1/1) ... [2021-11-12 23:06:45,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:06:45,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:06:46,286 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_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c[66437,66450] [2021-11-12 23:06:46,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:06:46,323 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 23:06:46,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@68b4999a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:46, skipping insertion in model container [2021-11-12 23:06:46,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:06:46,324 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:06:46,327 INFO L158 Benchmark]: Toolchain (without parser) took 846.61ms. Allocated memory is still 109.1MB. Free memory was 66.8MB in the beginning and 69.4MB in the end (delta: -2.7MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2021-11-12 23:06:46,329 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 109.1MB. Free memory is still 85.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:06:46,330 INFO L158 Benchmark]: CACSL2BoogieTranslator took 839.92ms. Allocated memory is still 109.1MB. Free memory was 66.6MB in the beginning and 69.7MB in the end (delta: -3.2MB). Peak memory consumption was 6.7MB. Max. memory is 16.1GB. [2021-11-12 23:06:46,333 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 109.1MB. Free memory is still 85.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 839.92ms. Allocated memory is still 109.1MB. Free memory was 66.6MB in the beginning and 69.7MB in the end (delta: -3.2MB). Peak memory consumption was 6.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/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_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/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_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/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 11bb1f05736dca729c358ce9b340534ff3d0ef3cd2b5d7b8f4dea43dade9112f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:06:48,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:06:48,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:06:48,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:06:48,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:06:48,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:06:48,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:06:48,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:06:48,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:06:48,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:06:48,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:06:48,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:06:48,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:06:48,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:06:48,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:06:48,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:06:48,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:06:48,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:06:48,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:06:48,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:06:48,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:06:48,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:06:48,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:06:48,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:06:48,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:06:48,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:06:48,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:06:48,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:06:48,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:06:48,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:06:48,888 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:06:48,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:06:48,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:06:48,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:06:48,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:06:48,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:06:48,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:06:48,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:06:48,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:06:48,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:06:48,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:06:48,899 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:06:48,946 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:06:48,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:06:48,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:06:48,949 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:06:48,949 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:06:48,949 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:06:48,950 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:06:48,950 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:06:48,950 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:06:48,950 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:06:48,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:06:48,953 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:06:48,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:06:48,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:06:48,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:06:48,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:06:48,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:06:48,955 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:06:48,955 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:06:48,955 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:06:48,955 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:06:48,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:06:48,956 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:06:48,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:06:48,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:06:48,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:06:48,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:06:48,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:06:48,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:06:48,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:06:48,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:06:48,958 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:06:48,959 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:06:48,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:06:48,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:06:48,960 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:06:48,960 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_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11bb1f05736dca729c358ce9b340534ff3d0ef3cd2b5d7b8f4dea43dade9112f [2021-11-12 23:06:49,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:06:49,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:06:49,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:06:49,427 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:06:49,428 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:06:49,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2021-11-12 23:06:49,494 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/data/45602d7dc/645b18c96ed34060ba1279199ad8b6cc/FLAG9e1c84a1d [2021-11-12 23:06:50,338 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:06:50,339 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2021-11-12 23:06:50,365 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/data/45602d7dc/645b18c96ed34060ba1279199ad8b6cc/FLAG9e1c84a1d [2021-11-12 23:06:50,536 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/data/45602d7dc/645b18c96ed34060ba1279199ad8b6cc [2021-11-12 23:06:50,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:06:50,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:06:50,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:06:50,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:06:50,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:06:50,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:06:50" (1/1) ... [2021-11-12 23:06:50,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5590fc65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:50, skipping insertion in model container [2021-11-12 23:06:50,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:06:50" (1/1) ... [2021-11-12 23:06:50,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:06:50,657 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:06:51,317 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_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c[66437,66450] [2021-11-12 23:06:51,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:06:51,370 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:06:51,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:06:51,553 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_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c[66437,66450] [2021-11-12 23:06:51,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:06:51,579 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:06:51,721 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_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c[66437,66450] [2021-11-12 23:06:51,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:06:51,761 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:06:51,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:51 WrapperNode [2021-11-12 23:06:51,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:06:51,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:06:51,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:06:51,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:06:51,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:51" (1/1) ... [2021-11-12 23:06:51,806 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:51" (1/1) ... [2021-11-12 23:06:51,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:06:51,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:06:51,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:06:51,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:06:51,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:51" (1/1) ... [2021-11-12 23:06:51,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:51" (1/1) ... [2021-11-12 23:06:51,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:51" (1/1) ... [2021-11-12 23:06:51,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:51" (1/1) ... [2021-11-12 23:06:51,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:51" (1/1) ... [2021-11-12 23:06:51,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:51" (1/1) ... [2021-11-12 23:06:52,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:51" (1/1) ... [2021-11-12 23:06:52,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:06:52,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:06:52,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:06:52,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:06:52,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:51" (1/1) ... [2021-11-12 23:06:52,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:06:52,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:06:52,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:06:52,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:06:52,144 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:06:52,146 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:06:52,147 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 23:06:52,147 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 23:06:52,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:06:52,147 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:06:52,147 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:06:52,148 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 23:06:52,148 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 23:06:52,148 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:06:52,148 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:06:52,148 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:06:52,149 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:06:52,149 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:06:52,149 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:06:52,149 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:06:52,149 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:06:52,150 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:06:52,150 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:06:52,150 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:06:52,150 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:06:52,150 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:06:52,150 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:06:52,151 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:06:52,151 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:06:52,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:06:52,151 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:06:52,151 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:06:52,152 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:06:52,152 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:06:52,152 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 23:06:52,153 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 23:06:52,153 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:06:52,153 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:06:52,153 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:06:52,153 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:06:52,154 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:06:52,154 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:06:52,154 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:06:52,154 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:06:52,155 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2021-11-12 23:06:52,155 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2021-11-12 23:06:52,155 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:06:52,155 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:06:52,155 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:06:52,156 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:06:52,156 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:06:52,156 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:06:52,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:06:52,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:06:52,158 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:06:52,159 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:06:56,407 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:06:56,408 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:06:56,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:06:56 BoogieIcfgContainer [2021-11-12 23:06:56,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:06:56,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:06:56,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:06:56,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:06:56,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:06:50" (1/3) ... [2021-11-12 23:06:56,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d928b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:06:56, skipping insertion in model container [2021-11-12 23:06:56,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:51" (2/3) ... [2021-11-12 23:06:56,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d928b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:06:56, skipping insertion in model container [2021-11-12 23:06:56,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:06:56" (3/3) ... [2021-11-12 23:06:56,421 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product27.cil.c [2021-11-12 23:06:56,427 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:06:56,427 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:06:56,490 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:06:56,498 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 23:06:56,499 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:06:56,536 INFO L276 IsEmpty]: Start isEmpty. Operand has 560 states, 441 states have (on average 1.6938775510204083) internal successors, (747), 462 states have internal predecessors, (747), 93 states have call successors, (93), 24 states have call predecessors, (93), 24 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-12 23:06:56,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 23:06:56,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:56,597 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] [2021-11-12 23:06:56,598 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:56,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:56,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1552478491, now seen corresponding path program 1 times [2021-11-12 23:06:56,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:56,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78481382] [2021-11-12 23:06:56,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:56,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:56,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:56,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:56,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:06:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:57,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:06:57,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:06:57,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:06:57,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:57,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78481382] [2021-11-12 23:06:57,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78481382] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:57,999 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:57,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:06:58,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821851586] [2021-11-12 23:06:58,002 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:58,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:06:58,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:58,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:06:58,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:06:58,051 INFO L87 Difference]: Start difference. First operand has 560 states, 441 states have (on average 1.6938775510204083) internal successors, (747), 462 states have internal predecessors, (747), 93 states have call successors, (93), 24 states have call predecessors, (93), 24 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) Second operand has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 23:06:58,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:58,161 INFO L93 Difference]: Finished difference Result 581 states and 963 transitions. [2021-11-12 23:06:58,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:06:58,164 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 104 [2021-11-12 23:06:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:58,206 INFO L225 Difference]: With dead ends: 581 [2021-11-12 23:06:58,206 INFO L226 Difference]: Without dead ends: 552 [2021-11-12 23:06:58,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 206 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 23:06:58,215 INFO L933 BasicCegarLoop]: 924 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, 924 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.83ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:58,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 21.83ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:06:58,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-12 23:06:58,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-11-12 23:06:58,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 435 states have (on average 1.6919540229885057) internal successors, (736), 454 states have internal predecessors, (736), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-12 23:06:58,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 917 transitions. [2021-11-12 23:06:58,331 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 917 transitions. Word has length 104 [2021-11-12 23:06:58,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:58,333 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 917 transitions. [2021-11-12 23:06:58,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 23:06:58,334 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 917 transitions. [2021-11-12 23:06:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 23:06:58,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:58,349 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] [2021-11-12 23:06:58,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:58,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:58,571 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:58,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:58,572 INFO L85 PathProgramCache]: Analyzing trace with hash -337581649, now seen corresponding path program 1 times [2021-11-12 23:06:58,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:58,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185072569] [2021-11-12 23:06:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:58,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:58,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:58,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:58,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:06:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:59,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:06:59,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:06:59,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:06:59,958 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:59,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185072569] [2021-11-12 23:06:59,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185072569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:59,958 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:59,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:06:59,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323634498] [2021-11-12 23:06:59,964 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:59,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:06:59,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:59,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:06:59,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:06:59,971 INFO L87 Difference]: Start difference. First operand 552 states and 917 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 23:07:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:00,109 INFO L93 Difference]: Finished difference Result 1088 states and 1812 transitions. [2021-11-12 23:07:00,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:07:00,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 106 [2021-11-12 23:07:00,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:00,118 INFO L225 Difference]: With dead ends: 1088 [2021-11-12 23:07:00,118 INFO L226 Difference]: Without dead ends: 552 [2021-11-12 23:07:00,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 206 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 23:07:00,126 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 30 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1807 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.28ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:00,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1807 Invalid, 39 Unknown, 0 Unchecked, 11.28ms Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 42.37ms Time] [2021-11-12 23:07:00,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-12 23:07:00,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-11-12 23:07:00,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 435 states have (on average 1.6781609195402298) internal successors, (730), 454 states have internal predecessors, (730), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-12 23:07:00,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 911 transitions. [2021-11-12 23:07:00,179 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 911 transitions. Word has length 106 [2021-11-12 23:07:00,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:00,179 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 911 transitions. [2021-11-12 23:07:00,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 23:07:00,180 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 911 transitions. [2021-11-12 23:07:00,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 23:07:00,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:00,209 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] [2021-11-12 23:07:00,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:00,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:00,436 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:00,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:00,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1686269851, now seen corresponding path program 1 times [2021-11-12 23:07:00,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:00,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219066580] [2021-11-12 23:07:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:00,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:00,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:00,440 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:00,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:07:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:01,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:07:01,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:07:01,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:07:01,914 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:01,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219066580] [2021-11-12 23:07:01,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219066580] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:01,915 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:01,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:07:01,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220779353] [2021-11-12 23:07:01,915 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:01,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:07:01,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:01,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:07:01,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:07:01,918 INFO L87 Difference]: Start difference. First operand 552 states and 911 transitions. Second operand has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 23:07:02,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:02,143 INFO L93 Difference]: Finished difference Result 1046 states and 1729 transitions. [2021-11-12 23:07:02,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:07:02,144 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 111 [2021-11-12 23:07:02,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:02,152 INFO L225 Difference]: With dead ends: 1046 [2021-11-12 23:07:02,152 INFO L226 Difference]: Without dead ends: 546 [2021-11-12 23:07:02,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 211 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 23:07:02,157 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 213 mSDsluCounter, 5365 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 6263 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.46ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:02,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 6263 Invalid, 90 Unknown, 0 Unchecked, 25.46ms Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 113.49ms Time] [2021-11-12 23:07:02,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-12 23:07:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-12 23:07:02,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 429 states have (on average 1.6713286713286712) internal successors, (717), 448 states have internal predecessors, (717), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-12 23:07:02,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 898 transitions. [2021-11-12 23:07:02,197 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 898 transitions. Word has length 111 [2021-11-12 23:07:02,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:02,197 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 898 transitions. [2021-11-12 23:07:02,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 23:07:02,199 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 898 transitions. [2021-11-12 23:07:02,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 23:07:02,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:02,204 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] [2021-11-12 23:07:02,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:02,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:02,405 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:02,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1288531394, now seen corresponding path program 1 times [2021-11-12 23:07:02,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:02,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232683184] [2021-11-12 23:07:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:02,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:02,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:02,410 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:02,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:07:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:03,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:07:03,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:07:03,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:07:03,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:03,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232683184] [2021-11-12 23:07:03,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232683184] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:03,638 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:03,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:07:03,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902929843] [2021-11-12 23:07:03,638 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:03,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:07:03,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:03,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:07:03,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:07:03,644 INFO L87 Difference]: Start difference. First operand 546 states and 898 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 23:07:03,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:03,844 INFO L93 Difference]: Finished difference Result 1049 states and 1730 transitions. [2021-11-12 23:07:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:07:03,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 112 [2021-11-12 23:07:03,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:03,852 INFO L225 Difference]: With dead ends: 1049 [2021-11-12 23:07:03,852 INFO L226 Difference]: Without dead ends: 546 [2021-11-12 23:07:03,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 218 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 23:07:03,880 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 215 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.51ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 127.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:03,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 1709 Invalid, 122 Unknown, 0 Unchecked, 7.51ms Time], IncrementalHoareTripleChecker [26 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 127.45ms Time] [2021-11-12 23:07:03,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-12 23:07:03,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-12 23:07:03,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 429 states have (on average 1.6153846153846154) internal successors, (693), 448 states have internal predecessors, (693), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-12 23:07:03,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 874 transitions. [2021-11-12 23:07:03,921 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 874 transitions. Word has length 112 [2021-11-12 23:07:03,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:03,921 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 874 transitions. [2021-11-12 23:07:03,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 23:07:03,922 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 874 transitions. [2021-11-12 23:07:03,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 23:07:03,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:03,931 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] [2021-11-12 23:07:03,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:04,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:04,146 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:04,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:04,147 INFO L85 PathProgramCache]: Analyzing trace with hash 2040769863, now seen corresponding path program 1 times [2021-11-12 23:07:04,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:04,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266311136] [2021-11-12 23:07:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:04,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:04,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:04,151 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:04,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:07:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:04,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:07:04,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:07:05,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:07:05,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:05,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266311136] [2021-11-12 23:07:05,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266311136] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:05,537 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:05,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:07:05,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226818626] [2021-11-12 23:07:05,538 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:05,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:07:05,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:05,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:07:05,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:07:05,540 INFO L87 Difference]: Start difference. First operand 546 states and 874 transitions. Second operand has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 23:07:05,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:05,714 INFO L93 Difference]: Finished difference Result 1040 states and 1692 transitions. [2021-11-12 23:07:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:07:05,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 114 [2021-11-12 23:07:05,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:05,723 INFO L225 Difference]: With dead ends: 1040 [2021-11-12 23:07:05,723 INFO L226 Difference]: Without dead ends: 525 [2021-11-12 23:07:05,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 220 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 23:07:05,732 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 147 mSDsluCounter, 3423 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 4285 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.93ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:05,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 4285 Invalid, 54 Unknown, 0 Unchecked, 13.93ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 88.02ms Time] [2021-11-12 23:07:05,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-12 23:07:05,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-11-12 23:07:05,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 408 states have (on average 1.6372549019607843) internal successors, (668), 427 states have internal predecessors, (668), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-12 23:07:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 849 transitions. [2021-11-12 23:07:05,771 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 849 transitions. Word has length 114 [2021-11-12 23:07:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:05,772 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 849 transitions. [2021-11-12 23:07:05,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 23:07:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 849 transitions. [2021-11-12 23:07:05,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 23:07:05,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:05,782 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] [2021-11-12 23:07:05,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:06,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:06,003 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:06,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:06,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1616324494, now seen corresponding path program 1 times [2021-11-12 23:07:06,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:06,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219765182] [2021-11-12 23:07:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:06,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:06,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:06,007 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:06,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:07:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:06,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:07:06,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:07:06,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:07:07,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:07,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219765182] [2021-11-12 23:07:07,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219765182] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:07,525 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:07,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:07:07,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072572319] [2021-11-12 23:07:07,526 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:07,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:07:07,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:07,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:07:07,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:07:07,528 INFO L87 Difference]: Start difference. First operand 525 states and 849 transitions. Second operand has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 23:07:07,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:07,713 INFO L93 Difference]: Finished difference Result 1013 states and 1656 transitions. [2021-11-12 23:07:07,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:07:07,714 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 117 [2021-11-12 23:07:07,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:07,720 INFO L225 Difference]: With dead ends: 1013 [2021-11-12 23:07:07,720 INFO L226 Difference]: Without dead ends: 525 [2021-11-12 23:07:07,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:07:07,724 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 44 mSDsluCounter, 7471 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 8305 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.28ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:07,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 8305 Invalid, 116 Unknown, 0 Unchecked, 16.28ms Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 102.87ms Time] [2021-11-12 23:07:07,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-12 23:07:07,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-11-12 23:07:07,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 408 states have (on average 1.6348039215686274) internal successors, (667), 427 states have internal predecessors, (667), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-12 23:07:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 848 transitions. [2021-11-12 23:07:07,749 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 848 transitions. Word has length 117 [2021-11-12 23:07:07,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:07,749 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 848 transitions. [2021-11-12 23:07:07,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 23:07:07,750 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 848 transitions. [2021-11-12 23:07:07,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 23:07:07,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:07,754 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] [2021-11-12 23:07:07,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:07,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:07,971 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:07,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:07,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2079240097, now seen corresponding path program 1 times [2021-11-12 23:07:07,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:07,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487962983] [2021-11-12 23:07:07,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:07,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:07,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:07,974 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:07,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:07:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:08,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:07:08,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:08,785 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 23:07:08,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:09,331 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 23:07:09,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:09,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487962983] [2021-11-12 23:07:09,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487962983] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:09,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:07:09,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:07:09,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223697540] [2021-11-12 23:07:09,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:09,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:07:09,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:09,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:07:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:07:09,333 INFO L87 Difference]: Start difference. First operand 525 states and 848 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:07:11,367 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 23:07:13,374 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 23:07:14,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:14,472 INFO L93 Difference]: Finished difference Result 1009 states and 1673 transitions. [2021-11-12 23:07:14,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:07:14,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 118 [2021-11-12 23:07:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:14,480 INFO L225 Difference]: With dead ends: 1009 [2021-11-12 23:07:14,480 INFO L226 Difference]: Without dead ends: 529 [2021-11-12 23:07:14,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 227 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 23:07:14,487 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 784 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4907.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 2121 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.50ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5046.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:14,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 2121 Invalid, 425 Unknown, 0 Unchecked, 13.50ms Time], IncrementalHoareTripleChecker [16 Valid, 407 Invalid, 2 Unknown, 0 Unchecked, 5046.90ms Time] [2021-11-12 23:07:14,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-11-12 23:07:14,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2021-11-12 23:07:14,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 411 states have (on average 1.6301703163017032) internal successors, (670), 430 states have internal predecessors, (670), 93 states have call successors, (93), 25 states have call predecessors, (93), 24 states have return successors, (89), 86 states have call predecessors, (89), 88 states have call successors, (89) [2021-11-12 23:07:14,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 852 transitions. [2021-11-12 23:07:14,525 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 852 transitions. Word has length 118 [2021-11-12 23:07:14,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:14,526 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 852 transitions. [2021-11-12 23:07:14,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:07:14,526 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 852 transitions. [2021-11-12 23:07:14,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 23:07:14,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:14,532 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] [2021-11-12 23:07:14,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:14,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:14,758 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:14,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:14,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1280737071, now seen corresponding path program 1 times [2021-11-12 23:07:14,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:14,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547022111] [2021-11-12 23:07:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:14,760 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:14,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:14,761 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:14,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:07:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:15,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:07:15,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:15,699 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 23:07:15,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:16,381 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 23:07:16,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:16,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547022111] [2021-11-12 23:07:16,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547022111] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:16,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:07:16,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:07:16,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56597244] [2021-11-12 23:07:16,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:16,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:07:16,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:16,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:07:16,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:07:16,384 INFO L87 Difference]: Start difference. First operand 529 states and 852 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:07:18,428 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 23:07:20,434 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:07:21,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:21,439 INFO L93 Difference]: Finished difference Result 1018 states and 1680 transitions. [2021-11-12 23:07:21,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:07:21,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 120 [2021-11-12 23:07:21,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:21,449 INFO L225 Difference]: With dead ends: 1018 [2021-11-12 23:07:21,449 INFO L226 Difference]: Without dead ends: 534 [2021-11-12 23:07:21,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 231 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 23:07:21,455 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 797 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4841.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.37ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4972.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:21,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 2122 Invalid, 427 Unknown, 0 Unchecked, 10.37ms Time], IncrementalHoareTripleChecker [14 Valid, 411 Invalid, 2 Unknown, 0 Unchecked, 4972.81ms Time] [2021-11-12 23:07:21,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-12 23:07:21,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 534. [2021-11-12 23:07:21,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 415 states have (on average 1.6240963855421686) internal successors, (674), 434 states have internal predecessors, (674), 93 states have call successors, (93), 26 states have call predecessors, (93), 25 states have return successors, (90), 86 states have call predecessors, (90), 88 states have call successors, (90) [2021-11-12 23:07:21,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 857 transitions. [2021-11-12 23:07:21,495 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 857 transitions. Word has length 120 [2021-11-12 23:07:21,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:21,496 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 857 transitions. [2021-11-12 23:07:21,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:07:21,496 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 857 transitions. [2021-11-12 23:07:21,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:07:21,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:21,503 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] [2021-11-12 23:07:21,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:21,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:21,718 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:21,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:21,719 INFO L85 PathProgramCache]: Analyzing trace with hash -316300383, now seen corresponding path program 1 times [2021-11-12 23:07:21,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:21,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070453637] [2021-11-12 23:07:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:21,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:21,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:21,721 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:21,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:07:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:22,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:07:22,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:22,711 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 23:07:22,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:23,237 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 23:07:23,237 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:23,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070453637] [2021-11-12 23:07:23,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070453637] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:23,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:07:23,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:07:23,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963416033] [2021-11-12 23:07:23,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:23,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:07:23,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:23,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:07:23,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:07:23,239 INFO L87 Difference]: Start difference. First operand 534 states and 857 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:07:25,271 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 23:07:27,279 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 23:07:28,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:28,334 INFO L93 Difference]: Finished difference Result 1029 states and 1689 transitions. [2021-11-12 23:07:28,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:07:28,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 122 [2021-11-12 23:07:28,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:28,341 INFO L225 Difference]: With dead ends: 1029 [2021-11-12 23:07:28,342 INFO L226 Difference]: Without dead ends: 540 [2021-11-12 23:07:28,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 235 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 23:07:28,347 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 785 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4867.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.69ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5009.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:28,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 2122 Invalid, 426 Unknown, 0 Unchecked, 11.69ms Time], IncrementalHoareTripleChecker [12 Valid, 412 Invalid, 2 Unknown, 0 Unchecked, 5009.74ms Time] [2021-11-12 23:07:28,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-12 23:07:28,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-12 23:07:28,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 420 states have (on average 1.6166666666666667) internal successors, (679), 439 states have internal predecessors, (679), 93 states have call successors, (93), 27 states have call predecessors, (93), 26 states have return successors, (91), 86 states have call predecessors, (91), 88 states have call successors, (91) [2021-11-12 23:07:28,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 863 transitions. [2021-11-12 23:07:28,405 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 863 transitions. Word has length 122 [2021-11-12 23:07:28,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:28,405 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 863 transitions. [2021-11-12 23:07:28,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:07:28,406 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 863 transitions. [2021-11-12 23:07:28,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 23:07:28,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:28,412 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] [2021-11-12 23:07:28,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:28,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:28,626 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:28,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:28,626 INFO L85 PathProgramCache]: Analyzing trace with hash 492353319, now seen corresponding path program 1 times [2021-11-12 23:07:28,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:28,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917670095] [2021-11-12 23:07:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:28,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:28,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:28,629 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:28,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:07:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:29,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:07:29,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:29,606 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 23:07:29,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:30,312 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 23:07:30,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:30,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917670095] [2021-11-12 23:07:30,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917670095] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:30,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:07:30,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:07:30,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626911811] [2021-11-12 23:07:30,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:30,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:07:30,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:30,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:07:30,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:07:30,315 INFO L87 Difference]: Start difference. First operand 540 states and 863 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:07:32,351 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 23:07:34,359 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 23:07:35,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:35,308 INFO L93 Difference]: Finished difference Result 1042 states and 1700 transitions. [2021-11-12 23:07:35,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:07:35,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 124 [2021-11-12 23:07:35,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:35,314 INFO L225 Difference]: With dead ends: 1042 [2021-11-12 23:07:35,315 INFO L226 Difference]: Without dead ends: 547 [2021-11-12 23:07:35,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 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 23:07:35,320 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 789 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4769.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.29ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4922.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:35,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 2122 Invalid, 425 Unknown, 0 Unchecked, 9.29ms Time], IncrementalHoareTripleChecker [10 Valid, 413 Invalid, 2 Unknown, 0 Unchecked, 4922.63ms Time] [2021-11-12 23:07:35,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-12 23:07:35,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2021-11-12 23:07:35,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 426 states have (on average 1.607981220657277) internal successors, (685), 445 states have internal predecessors, (685), 93 states have call successors, (93), 28 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-11-12 23:07:35,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 870 transitions. [2021-11-12 23:07:35,354 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 870 transitions. Word has length 124 [2021-11-12 23:07:35,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:35,354 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 870 transitions. [2021-11-12 23:07:35,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:07:35,355 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 870 transitions. [2021-11-12 23:07:35,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 23:07:35,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:35,361 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] [2021-11-12 23:07:35,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:35,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:35,574 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:35,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:35,575 INFO L85 PathProgramCache]: Analyzing trace with hash -547691103, now seen corresponding path program 1 times [2021-11-12 23:07:35,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:35,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015483098] [2021-11-12 23:07:35,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:35,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:35,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:35,577 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:35,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:07:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:36,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:07:36,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:36,883 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 23:07:36,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:38,110 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 23:07:38,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:38,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015483098] [2021-11-12 23:07:38,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015483098] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:07:38,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1155301868] [2021-11-12 23:07:38,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:38,112 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:07:38,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:07:38,114 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:07:38,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 23:07:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:38,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:07:38,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:38,717 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 23:07:38,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:39,053 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 23:07:39,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1155301868] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:39,054 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:07:39,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 23:07:39,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214619059] [2021-11-12 23:07:39,055 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:39,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:07:39,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:39,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:07:39,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:07:39,059 INFO L87 Difference]: Start difference. First operand 547 states and 870 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 23:07:39,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:39,219 INFO L93 Difference]: Finished difference Result 1542 states and 2509 transitions. [2021-11-12 23:07:39,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:07:39,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 126 [2021-11-12 23:07:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:39,233 INFO L225 Difference]: With dead ends: 1542 [2021-11-12 23:07:39,233 INFO L226 Difference]: Without dead ends: 1040 [2021-11-12 23:07:39,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:07:39,238 INFO L933 BasicCegarLoop]: 1033 mSDtfsCounter, 832 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.90ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.67ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:39,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 1822 Invalid, 10 Unknown, 0 Unchecked, 6.90ms Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 55.67ms Time] [2021-11-12 23:07:39,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-11-12 23:07:39,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 1038. [2021-11-12 23:07:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 810 states have (on average 1.628395061728395) internal successors, (1319), 843 states have internal predecessors, (1319), 176 states have call successors, (176), 51 states have call predecessors, (176), 51 states have return successors, (189), 169 states have call predecessors, (189), 171 states have call successors, (189) [2021-11-12 23:07:39,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1684 transitions. [2021-11-12 23:07:39,317 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1684 transitions. Word has length 126 [2021-11-12 23:07:39,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:39,318 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 1684 transitions. [2021-11-12 23:07:39,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 23:07:39,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1684 transitions. [2021-11-12 23:07:39,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:07:39,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:39,325 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] [2021-11-12 23:07:39,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:39,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:39,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:07:39,750 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:39,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:39,751 INFO L85 PathProgramCache]: Analyzing trace with hash 201314071, now seen corresponding path program 1 times [2021-11-12 23:07:39,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:39,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913980381] [2021-11-12 23:07:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:39,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:39,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:39,753 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:39,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:07:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:40,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:07:40,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:40,899 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 23:07:40,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:42,016 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 23:07:42,016 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:42,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913980381] [2021-11-12 23:07:42,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913980381] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:07:42,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [610521158] [2021-11-12 23:07:42,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:42,017 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:07:42,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:07:42,018 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:07:42,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 23:07:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:42,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:07:42,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:42,644 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 23:07:42,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:42,960 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 23:07:42,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [610521158] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:42,960 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:07:42,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 23:07:42,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007431225] [2021-11-12 23:07:42,961 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:42,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:07:42,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:42,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:07:42,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:07:42,963 INFO L87 Difference]: Start difference. First operand 1038 states and 1684 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 23:07:43,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:43,149 INFO L93 Difference]: Finished difference Result 3017 states and 4969 transitions. [2021-11-12 23:07:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:07:43,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 127 [2021-11-12 23:07:43,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:43,174 INFO L225 Difference]: With dead ends: 3017 [2021-11-12 23:07:43,175 INFO L226 Difference]: Without dead ends: 2024 [2021-11-12 23:07:43,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:07:43,183 INFO L933 BasicCegarLoop]: 999 mSDtfsCounter, 831 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 1791 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.42ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:43,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [831 Valid, 1791 Invalid, 10 Unknown, 0 Unchecked, 7.42ms Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 35.23ms Time] [2021-11-12 23:07:43,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-11-12 23:07:43,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 2021. [2021-11-12 23:07:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2021 states, 1579 states have (on average 1.6390120329322355) internal successors, (2588), 1640 states have internal predecessors, (2588), 342 states have call successors, (342), 97 states have call predecessors, (342), 99 states have return successors, (395), 335 states have call predecessors, (395), 337 states have call successors, (395) [2021-11-12 23:07:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 3325 transitions. [2021-11-12 23:07:43,298 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 3325 transitions. Word has length 127 [2021-11-12 23:07:43,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:43,299 INFO L470 AbstractCegarLoop]: Abstraction has 2021 states and 3325 transitions. [2021-11-12 23:07:43,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 23:07:43,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 3325 transitions. [2021-11-12 23:07:43,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 23:07:43,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:43,305 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] [2021-11-12 23:07:43,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:43,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:43,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:07:43,719 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:43,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:43,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1945641891, now seen corresponding path program 1 times [2021-11-12 23:07:43,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:43,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25193337] [2021-11-12 23:07:43,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:43,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:43,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:43,723 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:43,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:07:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:44,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:07:44,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:44,863 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 23:07:44,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:45,870 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 23:07:45,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:45,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25193337] [2021-11-12 23:07:45,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25193337] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:07:45,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1105041227] [2021-11-12 23:07:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:45,872 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:07:45,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:07:45,874 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:07:45,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 23:07:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:46,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:07:46,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:46,627 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 23:07:46,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:46,885 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 23:07:46,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1105041227] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:46,885 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:07:46,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 23:07:46,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397327495] [2021-11-12 23:07:46,886 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:46,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:07:46,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:46,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:07:46,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:07:46,887 INFO L87 Difference]: Start difference. First operand 2021 states and 3325 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 23:07:47,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:47,058 INFO L93 Difference]: Finished difference Result 5968 states and 9943 transitions. [2021-11-12 23:07:47,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:07:47,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 128 [2021-11-12 23:07:47,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:47,105 INFO L225 Difference]: With dead ends: 5968 [2021-11-12 23:07:47,106 INFO L226 Difference]: Without dead ends: 3992 [2021-11-12 23:07:47,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:07:47,124 INFO L933 BasicCegarLoop]: 999 mSDtfsCounter, 830 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 1794 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.84ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:47,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 1794 Invalid, 10 Unknown, 0 Unchecked, 4.84ms Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 36.56ms Time] [2021-11-12 23:07:47,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3992 states. [2021-11-12 23:07:47,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3992 to 3988. [2021-11-12 23:07:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3118 states have (on average 1.6440025657472739) internal successors, (5126), 3235 states have internal predecessors, (5126), 674 states have call successors, (674), 189 states have call predecessors, (674), 195 states have return successors, (843), 667 states have call predecessors, (843), 669 states have call successors, (843) [2021-11-12 23:07:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 6643 transitions. [2021-11-12 23:07:47,386 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 6643 transitions. Word has length 128 [2021-11-12 23:07:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:47,386 INFO L470 AbstractCegarLoop]: Abstraction has 3988 states and 6643 transitions. [2021-11-12 23:07:47,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 23:07:47,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 6643 transitions. [2021-11-12 23:07:47,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-12 23:07:47,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:47,393 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] [2021-11-12 23:07:47,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:47,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:47,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:47,796 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:47,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:47,797 INFO L85 PathProgramCache]: Analyzing trace with hash 185233369, now seen corresponding path program 1 times [2021-11-12 23:07:47,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:47,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635982019] [2021-11-12 23:07:47,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:47,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:47,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:47,799 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:47,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:07:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:48,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:07:48,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:48,752 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 23:07:48,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:49,645 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 23:07:49,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:49,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635982019] [2021-11-12 23:07:49,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635982019] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:07:49,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1428145138] [2021-11-12 23:07:49,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:49,646 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:07:49,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:07:49,647 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:07:49,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 23:07:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:49,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:07:49,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:50,197 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 23:07:50,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:50,480 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 23:07:50,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1428145138] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:50,480 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:07:50,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 23:07:50,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313962103] [2021-11-12 23:07:50,481 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:50,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:07:50,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:50,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:07:50,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:07:50,482 INFO L87 Difference]: Start difference. First operand 3988 states and 6643 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 23:07:50,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:50,801 INFO L93 Difference]: Finished difference Result 11871 states and 20068 transitions. [2021-11-12 23:07:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:07:50,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 129 [2021-11-12 23:07:50,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:50,868 INFO L225 Difference]: With dead ends: 11871 [2021-11-12 23:07:50,868 INFO L226 Difference]: Without dead ends: 7928 [2021-11-12 23:07:50,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:07:50,898 INFO L933 BasicCegarLoop]: 1004 mSDtfsCounter, 829 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.88ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:50,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 1802 Invalid, 10 Unknown, 0 Unchecked, 4.88ms Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 33.55ms Time] [2021-11-12 23:07:50,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7928 states. [2021-11-12 23:07:51,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7928 to 7923. [2021-11-12 23:07:51,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7923 states, 6197 states have (on average 1.6459577214781347) internal successors, (10200), 6426 states have internal predecessors, (10200), 1338 states have call successors, (1338), 373 states have call predecessors, (1338), 387 states have return successors, (1859), 1331 states have call predecessors, (1859), 1333 states have call successors, (1859) [2021-11-12 23:07:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7923 states to 7923 states and 13397 transitions. [2021-11-12 23:07:51,468 INFO L78 Accepts]: Start accepts. Automaton has 7923 states and 13397 transitions. Word has length 129 [2021-11-12 23:07:51,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:51,469 INFO L470 AbstractCegarLoop]: Abstraction has 7923 states and 13397 transitions. [2021-11-12 23:07:51,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 23:07:51,470 INFO L276 IsEmpty]: Start isEmpty. Operand 7923 states and 13397 transitions. [2021-11-12 23:07:51,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-12 23:07:51,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:51,476 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] [2021-11-12 23:07:51,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:51,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-12 23:07:51,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:07:51,899 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:51,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:51,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1447147941, now seen corresponding path program 1 times [2021-11-12 23:07:51,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:51,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132759134] [2021-11-12 23:07:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:51,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:51,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:51,901 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:51,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:07:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:52,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:07:52,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:52,901 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 23:07:52,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:53,822 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 23:07:53,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:53,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132759134] [2021-11-12 23:07:53,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132759134] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:07:53,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1708650505] [2021-11-12 23:07:53,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:53,823 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:07:53,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:07:53,826 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:07:53,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 23:07:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:54,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:07:54,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:54,445 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 23:07:54,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:54,698 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 23:07:54,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1708650505] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:54,699 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:07:54,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 23:07:54,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021734393] [2021-11-12 23:07:54,699 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:54,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:07:54,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:54,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:07:54,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:07:54,701 INFO L87 Difference]: Start difference. First operand 7923 states and 13397 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 23:07:55,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:55,466 INFO L93 Difference]: Finished difference Result 23678 states and 40956 transitions. [2021-11-12 23:07:55,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:07:55,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 130 [2021-11-12 23:07:55,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:55,759 INFO L225 Difference]: With dead ends: 23678 [2021-11-12 23:07:55,760 INFO L226 Difference]: Without dead ends: 15792 [2021-11-12 23:07:55,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:07:55,816 INFO L933 BasicCegarLoop]: 1025 mSDtfsCounter, 827 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 1826 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.75ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.36ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:55,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 1826 Invalid, 8 Unknown, 0 Unchecked, 5.75ms Time], IncrementalHoareTripleChecker [5 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 40.36ms Time] [2021-11-12 23:07:55,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15792 states. [2021-11-12 23:07:56,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15792 to 15786. [2021-11-12 23:07:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15786 states, 12349 states have (on average 1.6461251923232652) internal successors, (20328), 12802 states have internal predecessors, (20328), 2666 states have call successors, (2666), 741 states have call predecessors, (2666), 770 states have return successors, (4322), 2658 states have call predecessors, (4322), 2661 states have call successors, (4322) [2021-11-12 23:07:56,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15786 states to 15786 states and 27316 transitions. [2021-11-12 23:07:56,952 INFO L78 Accepts]: Start accepts. Automaton has 15786 states and 27316 transitions. Word has length 130 [2021-11-12 23:07:56,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:56,953 INFO L470 AbstractCegarLoop]: Abstraction has 15786 states and 27316 transitions. [2021-11-12 23:07:56,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 23:07:56,953 INFO L276 IsEmpty]: Start isEmpty. Operand 15786 states and 27316 transitions. [2021-11-12 23:07:56,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-12 23:07:56,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:56,983 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] [2021-11-12 23:07:57,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:57,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-12 23:07:57,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:07:57,398 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:57,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:57,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1368424932, now seen corresponding path program 1 times [2021-11-12 23:07:57,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:57,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057430274] [2021-11-12 23:07:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:57,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:57,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:57,400 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:57,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:07:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:57,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:07:57,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:58,457 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 23:07:58,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:59,464 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 23:07:59,464 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:59,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057430274] [2021-11-12 23:07:59,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057430274] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:59,465 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:59,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-11-12 23:07:59,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979715522] [2021-11-12 23:07:59,465 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:59,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:07:59,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:59,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:07:59,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:07:59,466 INFO L87 Difference]: Start difference. First operand 15786 states and 27316 transitions. Second operand has 16 states, 16 states have (on average 9.1875) internal successors, (147), 12 states have internal predecessors, (147), 6 states have call successors, (30), 4 states have call predecessors, (30), 8 states have return successors, (29), 10 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-12 23:08:01,484 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 23:08:03,492 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:05,497 WARN L515 Checker$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 23:08:07,502 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:09,508 WARN L515 Checker$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 23:08:25,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:25,894 INFO L93 Difference]: Finished difference Result 76771 states and 150040 transitions. [2021-11-12 23:08:25,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-12 23:08:25,896 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 12 states have internal predecessors, (147), 6 states have call successors, (30), 4 states have call predecessors, (30), 8 states have return successors, (29), 10 states have call predecessors, (29), 5 states have call successors, (29) Word has length 194 [2021-11-12 23:08:25,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:26,520 INFO L225 Difference]: With dead ends: 76771 [2021-11-12 23:08:26,520 INFO L226 Difference]: Without dead ends: 61030 [2021-11-12 23:08:26,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2021-11-12 23:08:26,734 INFO L933 BasicCegarLoop]: 1782 mSDtfsCounter, 7268 mSDsluCounter, 5697 mSDsCounter, 0 mSdLazyCounter, 11369 mSolverCounterSat, 3008 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21412.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7305 SdHoareTripleChecker+Valid, 7479 SdHoareTripleChecker+Invalid, 14382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 88.27ms SdHoareTripleChecker+Time, 3008 IncrementalHoareTripleChecker+Valid, 11369 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23116.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:26,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7305 Valid, 7479 Invalid, 14382 Unknown, 0 Unchecked, 88.27ms Time], IncrementalHoareTripleChecker [3008 Valid, 11369 Invalid, 5 Unknown, 0 Unchecked, 23116.95ms Time] [2021-11-12 23:08:26,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61030 states. [2021-11-12 23:08:30,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61030 to 53136. [2021-11-12 23:08:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53136 states, 40480 states have (on average 1.629298418972332) internal successors, (65954), 42213 states have internal predecessors, (65954), 10060 states have call successors, (10060), 2214 states have call predecessors, (10060), 2595 states have return successors, (23170), 10276 states have call predecessors, (23170), 10055 states have call successors, (23170) [2021-11-12 23:08:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53136 states to 53136 states and 99184 transitions. [2021-11-12 23:08:31,403 INFO L78 Accepts]: Start accepts. Automaton has 53136 states and 99184 transitions. Word has length 194 [2021-11-12 23:08:31,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:31,403 INFO L470 AbstractCegarLoop]: Abstraction has 53136 states and 99184 transitions. [2021-11-12 23:08:31,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 12 states have internal predecessors, (147), 6 states have call successors, (30), 4 states have call predecessors, (30), 8 states have return successors, (29), 10 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-12 23:08:31,404 INFO L276 IsEmpty]: Start isEmpty. Operand 53136 states and 99184 transitions. [2021-11-12 23:08:31,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-12 23:08:31,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:31,720 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] [2021-11-12 23:08:31,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:31,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:31,936 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:31,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:31,937 INFO L85 PathProgramCache]: Analyzing trace with hash -781389569, now seen corresponding path program 1 times [2021-11-12 23:08:31,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:31,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050601676] [2021-11-12 23:08:31,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:31,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:31,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:31,938 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:31,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:08:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:32,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:08:32,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:32,902 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 23:08:32,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:33,490 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 23:08:33,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:33,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050601676] [2021-11-12 23:08:33,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050601676] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:33,490 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:33,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 23:08:33,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473219280] [2021-11-12 23:08:33,491 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:33,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:08:33,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:33,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:08:33,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:08:33,493 INFO L87 Difference]: Start difference. First operand 53136 states and 99184 transitions. Second operand has 10 states, 9 states have (on average 24.77777777777778) internal successors, (223), 9 states have internal predecessors, (223), 3 states have call successors, (44), 2 states have call predecessors, (44), 4 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-12 23:08:34,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:34,910 INFO L93 Difference]: Finished difference Result 68725 states and 126171 transitions. [2021-11-12 23:08:34,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:08:34,910 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 24.77777777777778) internal successors, (223), 9 states have internal predecessors, (223), 3 states have call successors, (44), 2 states have call predecessors, (44), 4 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) Word has length 197 [2021-11-12 23:08:34,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:34,999 INFO L225 Difference]: With dead ends: 68725 [2021-11-12 23:08:35,000 INFO L226 Difference]: Without dead ends: 15623 [2021-11-12 23:08:35,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:08:35,335 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 26 mSDsluCounter, 5756 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6583 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.52ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:35,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 6583 Invalid, 79 Unknown, 0 Unchecked, 6.52ms Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 66.97ms Time] [2021-11-12 23:08:35,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15623 states. [2021-11-12 23:08:36,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15623 to 15623. [2021-11-12 23:08:36,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15623 states, 12250 states have (on average 1.645795918367347) internal successors, (20161), 12703 states have internal predecessors, (20161), 2602 states have call successors, (2602), 741 states have call predecessors, (2602), 770 states have return successors, (4258), 2594 states have call predecessors, (4258), 2597 states have call successors, (4258) [2021-11-12 23:08:36,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15623 states to 15623 states and 27021 transitions. [2021-11-12 23:08:36,195 INFO L78 Accepts]: Start accepts. Automaton has 15623 states and 27021 transitions. Word has length 197 [2021-11-12 23:08:36,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:36,195 INFO L470 AbstractCegarLoop]: Abstraction has 15623 states and 27021 transitions. [2021-11-12 23:08:36,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 24.77777777777778) internal successors, (223), 9 states have internal predecessors, (223), 3 states have call successors, (44), 2 states have call predecessors, (44), 4 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-12 23:08:36,196 INFO L276 IsEmpty]: Start isEmpty. Operand 15623 states and 27021 transitions. [2021-11-12 23:08:36,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-12 23:08:36,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:36,213 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] [2021-11-12 23:08:36,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:36,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:36,436 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:36,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:36,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1936184975, now seen corresponding path program 1 times [2021-11-12 23:08:36,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:36,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769125095] [2021-11-12 23:08:36,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:36,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:36,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:36,440 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:36,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:08:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:37,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:08:37,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 23:08:37,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 23:08:38,625 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:38,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769125095] [2021-11-12 23:08:38,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769125095] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:38,626 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:38,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 13 [2021-11-12 23:08:38,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140462199] [2021-11-12 23:08:38,627 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:38,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:08:38,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:38,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:08:38,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:08:38,629 INFO L87 Difference]: Start difference. First operand 15623 states and 27021 transitions. Second operand has 13 states, 13 states have (on average 11.692307692307692) internal successors, (152), 11 states have internal predecessors, (152), 6 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-12 23:08:40,655 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:42,660 WARN L515 Checker$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 23:08:44,664 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 23:08:47,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:47,903 INFO L93 Difference]: Finished difference Result 31396 states and 55408 transitions. [2021-11-12 23:08:47,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:08:47,904 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.692307692307692) internal successors, (152), 11 states have internal predecessors, (152), 6 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 5 states have call successors, (31) Word has length 200 [2021-11-12 23:08:47,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:48,005 INFO L225 Difference]: With dead ends: 31396 [2021-11-12 23:08:48,005 INFO L226 Difference]: Without dead ends: 15815 [2021-11-12 23:08:48,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:08:48,084 INFO L933 BasicCegarLoop]: 743 mSDtfsCounter, 1311 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 352 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8113.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.73ms SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8451.76ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:48,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1311 Valid, 1850 Invalid, 2685 Unknown, 0 Unchecked, 17.73ms Time], IncrementalHoareTripleChecker [352 Valid, 2330 Invalid, 3 Unknown, 0 Unchecked, 8451.76ms Time] [2021-11-12 23:08:48,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15815 states. [2021-11-12 23:08:49,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15815 to 15751. [2021-11-12 23:08:49,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15751 states, 12346 states have (on average 1.6407743398671635) internal successors, (20257), 12799 states have internal predecessors, (20257), 2602 states have call successors, (2602), 741 states have call predecessors, (2602), 802 states have return successors, (4418), 2626 states have call predecessors, (4418), 2597 states have call successors, (4418) [2021-11-12 23:08:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15751 states to 15751 states and 27277 transitions. [2021-11-12 23:08:49,171 INFO L78 Accepts]: Start accepts. Automaton has 15751 states and 27277 transitions. Word has length 200 [2021-11-12 23:08:49,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:49,171 INFO L470 AbstractCegarLoop]: Abstraction has 15751 states and 27277 transitions. [2021-11-12 23:08:49,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.692307692307692) internal successors, (152), 11 states have internal predecessors, (152), 6 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-12 23:08:49,172 INFO L276 IsEmpty]: Start isEmpty. Operand 15751 states and 27277 transitions. [2021-11-12 23:08:49,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-12 23:08:49,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:49,190 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:08:49,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:49,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:49,417 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:49,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:49,418 INFO L85 PathProgramCache]: Analyzing trace with hash 602511838, now seen corresponding path program 1 times [2021-11-12 23:08:49,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:49,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633303476] [2021-11-12 23:08:49,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:49,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:49,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:49,421 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:49,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:08:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:50,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:08:50,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-12 23:08:50,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-12 23:08:51,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:51,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633303476] [2021-11-12 23:08:51,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633303476] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:51,675 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:51,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 23:08:51,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158248556] [2021-11-12 23:08:51,676 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:51,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:08:51,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:51,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:08:51,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:08:51,678 INFO L87 Difference]: Start difference. First operand 15751 states and 27277 transitions. Second operand has 12 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 8 states have call successors, (47), 6 states have call predecessors, (47), 7 states have return successors, (47), 8 states have call predecessors, (47), 7 states have call successors, (47) [2021-11-12 23:08:53,697 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 23:09:00,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:00,609 INFO L93 Difference]: Finished difference Result 61951 states and 111674 transitions. [2021-11-12 23:09:00,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:09:00,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 8 states have call successors, (47), 6 states have call predecessors, (47), 7 states have return successors, (47), 8 states have call predecessors, (47), 7 states have call successors, (47) Word has length 201 [2021-11-12 23:09:00,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:00,961 INFO L225 Difference]: With dead ends: 61951 [2021-11-12 23:09:00,961 INFO L226 Difference]: Without dead ends: 46242 [2021-11-12 23:09:01,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:09:01,084 INFO L933 BasicCegarLoop]: 1293 mSDtfsCounter, 3480 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 4749 mSolverCounterSat, 902 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6373.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3609 SdHoareTripleChecker+Valid, 3105 SdHoareTripleChecker+Invalid, 5652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.59ms SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 4749 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7156.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:01,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3609 Valid, 3105 Invalid, 5652 Unknown, 0 Unchecked, 38.59ms Time], IncrementalHoareTripleChecker [902 Valid, 4749 Invalid, 1 Unknown, 0 Unchecked, 7156.49ms Time] [2021-11-12 23:09:01,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46242 states. [2021-11-12 23:09:03,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46242 to 45838. [2021-11-12 23:09:03,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45838 states, 35844 states have (on average 1.6107856266041736) internal successors, (57737), 37192 states have internal predecessors, (57737), 7592 states have call successors, (7592), 2309 states have call predecessors, (7592), 2401 states have return successors, (15136), 7489 states have call predecessors, (15136), 7587 states have call successors, (15136) [2021-11-12 23:09:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45838 states to 45838 states and 80465 transitions. [2021-11-12 23:09:03,461 INFO L78 Accepts]: Start accepts. Automaton has 45838 states and 80465 transitions. Word has length 201 [2021-11-12 23:09:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:03,462 INFO L470 AbstractCegarLoop]: Abstraction has 45838 states and 80465 transitions. [2021-11-12 23:09:03,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 8 states have call successors, (47), 6 states have call predecessors, (47), 7 states have return successors, (47), 8 states have call predecessors, (47), 7 states have call successors, (47) [2021-11-12 23:09:03,462 INFO L276 IsEmpty]: Start isEmpty. Operand 45838 states and 80465 transitions. [2021-11-12 23:09:03,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-12 23:09:03,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:03,477 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, 1, 1] [2021-11-12 23:09:03,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-12 23:09:03,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:03,704 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:03,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:03,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1335130824, now seen corresponding path program 1 times [2021-11-12 23:09:03,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:03,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251884248] [2021-11-12 23:09:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:03,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:03,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:03,706 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:03,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:09:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:04,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:09:04,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 23:09:04,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 23:09:05,278 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:05,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251884248] [2021-11-12 23:09:05,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251884248] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:05,279 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:05,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 11 [2021-11-12 23:09:05,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251946034] [2021-11-12 23:09:05,279 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:05,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:09:05,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:05,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:09:05,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:09:05,281 INFO L87 Difference]: Start difference. First operand 45838 states and 80465 transitions. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 6 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (30), 6 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-12 23:09:07,312 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:09:09,318 WARN L515 Checker$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 23:09:11,323 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 23:09:25,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:25,292 INFO L93 Difference]: Finished difference Result 166003 states and 347694 transitions. [2021-11-12 23:09:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:09:25,293 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 6 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (30), 6 states have call predecessors, (30), 5 states have call successors, (30) Word has length 203 [2021-11-12 23:09:25,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:26,694 INFO L225 Difference]: With dead ends: 166003 [2021-11-12 23:09:26,694 INFO L226 Difference]: Without dead ends: 120207 [2021-11-12 23:09:27,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:09:27,092 INFO L933 BasicCegarLoop]: 1697 mSDtfsCounter, 3914 mSDsluCounter, 2734 mSDsCounter, 0 mSdLazyCounter, 6191 mSolverCounterSat, 1279 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11791.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3948 SdHoareTripleChecker+Valid, 4431 SdHoareTripleChecker+Invalid, 7473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.97ms SdHoareTripleChecker+Time, 1279 IncrementalHoareTripleChecker+Valid, 6191 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12665.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:27,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3948 Valid, 4431 Invalid, 7473 Unknown, 0 Unchecked, 40.97ms Time], IncrementalHoareTripleChecker [1279 Valid, 6191 Invalid, 3 Unknown, 0 Unchecked, 12665.12ms Time] [2021-11-12 23:09:27,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120207 states. [2021-11-12 23:09:34,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120207 to 107316. [2021-11-12 23:09:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107316 states, 80461 states have (on average 1.5900001242838144) internal successors, (127933), 84881 states have internal predecessors, (127933), 21702 states have call successors, (21702), 4613 states have call predecessors, (21702), 5152 states have return successors, (52141), 21663 states have call predecessors, (52141), 21697 states have call successors, (52141) [2021-11-12 23:09:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107316 states to 107316 states and 201776 transitions. [2021-11-12 23:09:35,738 INFO L78 Accepts]: Start accepts. Automaton has 107316 states and 201776 transitions. Word has length 203 [2021-11-12 23:09:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:35,738 INFO L470 AbstractCegarLoop]: Abstraction has 107316 states and 201776 transitions. [2021-11-12 23:09:35,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 6 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (30), 6 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-12 23:09:35,739 INFO L276 IsEmpty]: Start isEmpty. Operand 107316 states and 201776 transitions. [2021-11-12 23:09:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-12 23:09:35,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:35,764 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, 1, 1] [2021-11-12 23:09:35,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-12 23:09:35,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:36,000 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:36,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:36,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1153397575, now seen corresponding path program 1 times [2021-11-12 23:09:36,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:36,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670452349] [2021-11-12 23:09:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:36,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:36,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:36,002 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:36,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc207376-c46a-4a3a-9465-2b7bcfaeddc5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:09:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:36,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:09:36,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 23:09:36,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 23:09:37,376 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:37,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670452349] [2021-11-12 23:09:37,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670452349] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:37,376 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:37,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-12 23:09:37,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312377188] [2021-11-12 23:09:37,377 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:37,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:09:37,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:37,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:09:37,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:09:37,378 INFO L87 Difference]: Start difference. First operand 107316 states and 201776 transitions. Second operand has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39)