./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product09.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_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/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_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/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_4cc5849a-ca47-47b4-ba39-6d92e898545b/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 4cb164e6307f0ddcae5850d7f4578967441d1456f6ed5a5be472ba090758b873 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:08:44,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:08:44,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:08:44,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:08:44,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:08:44,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:08:44,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:08:44,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:08:44,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:08:44,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:08:44,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:08:44,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:08:44,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:08:44,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:08:44,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:08:44,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:08:44,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:08:44,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:08:44,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:08:44,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:08:44,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:08:44,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:08:44,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:08:44,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:08:44,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:08:44,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:08:44,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:08:44,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:08:44,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:08:44,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:08:44,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:08:44,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:08:44,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:08:44,975 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:08:44,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:08:44,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:08:44,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:08:44,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:08:44,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:08:44,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:08:44,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:08:44,983 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:08:45,020 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:08:45,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:08:45,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:08:45,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:08:45,022 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:08:45,022 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:08:45,022 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:08:45,022 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:08:45,023 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:08:45,023 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:08:45,023 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:08:45,023 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:08:45,024 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:08:45,024 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:08:45,024 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:08:45,025 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:08:45,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:08:45,026 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:08:45,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:08:45,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:08:45,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:08:45,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:08:45,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:08:45,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:08:45,028 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:08:45,028 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:08:45,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:08:45,028 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:08:45,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:08:45,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:08:45,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:08:45,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:08:45,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:08:45,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:08:45,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:08:45,031 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:08:45,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:08:45,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:08:45,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:08:45,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:08:45,032 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_4cc5849a-ca47-47b4-ba39-6d92e898545b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cb164e6307f0ddcae5850d7f4578967441d1456f6ed5a5be472ba090758b873 [2021-11-12 23:08:45,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:08:45,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:08:45,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:08:45,303 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:08:45,304 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:08:45,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c [2021-11-12 23:08:45,395 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/data/24d3b0ae9/02547ddd292f485fa9d1c07e7b650ac9/FLAG6fa0cf2a8 [2021-11-12 23:08:45,997 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:08:46,000 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c [2021-11-12 23:08:46,036 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/data/24d3b0ae9/02547ddd292f485fa9d1c07e7b650ac9/FLAG6fa0cf2a8 [2021-11-12 23:08:46,249 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/data/24d3b0ae9/02547ddd292f485fa9d1c07e7b650ac9 [2021-11-12 23:08:46,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:08:46,254 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:08:46,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:08:46,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:08:46,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:08:46,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:08:46" (1/1) ... [2021-11-12 23:08:46,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@364cc3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:46, skipping insertion in model container [2021-11-12 23:08:46,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:08:46" (1/1) ... [2021-11-12 23:08:46,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:08:46,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:08:46,708 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_4cc5849a-ca47-47b4-ba39-6d92e898545b/sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c[28842,28855] [2021-11-12 23:08:46,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:08:46,962 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 23:08:46,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3440b4ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:46, skipping insertion in model container [2021-11-12 23:08:46,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:08:46,964 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:08:46,966 INFO L158 Benchmark]: Toolchain (without parser) took 711.12ms. Allocated memory is still 98.6MB. Free memory was 62.7MB in the beginning and 59.6MB in the end (delta: 3.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:08:46,968 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 98.6MB. Free memory was 52.5MB in the beginning and 52.4MB in the end (delta: 41.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:08:46,970 INFO L158 Benchmark]: CACSL2BoogieTranslator took 708.32ms. Allocated memory is still 98.6MB. Free memory was 62.5MB in the beginning and 59.6MB in the end (delta: 2.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:08:46,972 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 98.6MB. Free memory was 52.5MB in the beginning and 52.4MB in the end (delta: 41.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 708.32ms. Allocated memory is still 98.6MB. Free memory was 62.5MB in the beginning and 59.6MB in the end (delta: 2.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2898]: 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_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/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_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/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_4cc5849a-ca47-47b4-ba39-6d92e898545b/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 4cb164e6307f0ddcae5850d7f4578967441d1456f6ed5a5be472ba090758b873 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:08:49,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:08:49,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:08:49,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:08:49,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:08:49,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:08:49,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:08:49,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:08:49,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:08:49,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:08:49,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:08:49,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:08:49,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:08:49,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:08:49,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:08:49,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:08:49,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:08:49,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:08:49,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:08:49,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:08:49,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:08:49,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:08:49,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:08:49,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:08:49,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:08:49,378 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:08:49,378 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:08:49,380 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:08:49,381 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:08:49,382 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:08:49,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:08:49,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:08:49,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:08:49,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:08:49,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:08:49,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:08:49,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:08:49,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:08:49,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:08:49,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:08:49,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:08:49,399 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:08:49,440 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:08:49,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:08:49,442 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:08:49,442 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:08:49,443 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:08:49,443 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:08:49,443 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:08:49,443 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:08:49,443 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:08:49,444 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:08:49,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:08:49,446 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:08:49,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:08:49,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:08:49,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:08:49,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:08:49,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:08:49,448 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:08:49,448 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:08:49,448 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:08:49,448 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:08:49,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:08:49,449 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:08:49,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:08:49,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:08:49,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:08:49,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:08:49,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:08:49,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:08:49,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:08:49,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:08:49,451 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:08:49,451 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:08:49,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:08:49,452 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:08:49,452 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:08:49,452 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_4cc5849a-ca47-47b4-ba39-6d92e898545b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cb164e6307f0ddcae5850d7f4578967441d1456f6ed5a5be472ba090758b873 [2021-11-12 23:08:49,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:08:49,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:08:49,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:08:49,918 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:08:49,920 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:08:49,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c [2021-11-12 23:08:50,002 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/data/88980f24a/afc5ece4d46c443b9db450a71e239670/FLAGf0fb6d67f [2021-11-12 23:08:50,738 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:08:50,745 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c [2021-11-12 23:08:50,783 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/data/88980f24a/afc5ece4d46c443b9db450a71e239670/FLAGf0fb6d67f [2021-11-12 23:08:51,007 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/data/88980f24a/afc5ece4d46c443b9db450a71e239670 [2021-11-12 23:08:51,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:08:51,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:08:51,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:08:51,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:08:51,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:08:51,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:08:51" (1/1) ... [2021-11-12 23:08:51,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@588cd221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:51, skipping insertion in model container [2021-11-12 23:08:51,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:08:51" (1/1) ... [2021-11-12 23:08:51,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:08:51,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:08:51,633 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_4cc5849a-ca47-47b4-ba39-6d92e898545b/sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c[28842,28855] [2021-11-12 23:08:51,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:08:51,925 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:08:51,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:08:52,014 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_4cc5849a-ca47-47b4-ba39-6d92e898545b/sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c[28842,28855] [2021-11-12 23:08:52,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:08:52,095 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:08:52,142 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_4cc5849a-ca47-47b4-ba39-6d92e898545b/sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c[28842,28855] [2021-11-12 23:08:52,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:08:52,263 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:08:52,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:52 WrapperNode [2021-11-12 23:08:52,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:08:52,265 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:08:52,265 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:08:52,265 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:08:52,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:52" (1/1) ... [2021-11-12 23:08:52,305 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:52" (1/1) ... [2021-11-12 23:08:52,368 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:08:52,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:08:52,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:08:52,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:08:52,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:52" (1/1) ... [2021-11-12 23:08:52,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:52" (1/1) ... [2021-11-12 23:08:52,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:52" (1/1) ... [2021-11-12 23:08:52,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:52" (1/1) ... [2021-11-12 23:08:52,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:52" (1/1) ... [2021-11-12 23:08:52,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:52" (1/1) ... [2021-11-12 23:08:52,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:52" (1/1) ... [2021-11-12 23:08:52,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:08:52,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:08:52,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:08:52,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:08:52,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:52" (1/1) ... [2021-11-12 23:08:52,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:08:52,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:52,577 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:08:52,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:08:52,618 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 23:08:52,619 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 23:08:52,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:08:52,619 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:08:52,620 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:08:52,620 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:08:52,620 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:08:52,620 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:08:52,620 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:08:52,621 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:08:52,621 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:08:52,621 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:08:52,621 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:08:52,621 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 23:08:52,622 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 23:08:52,640 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:08:52,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:08:52,641 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:08:52,641 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:08:52,641 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:08:52,641 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:08:52,642 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:08:52,642 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:08:52,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:08:52,642 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:08:52,642 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:08:52,643 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:08:52,643 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:08:52,643 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:08:52,643 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:08:52,643 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:08:52,644 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:08:52,644 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:08:52,644 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:08:52,644 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:08:52,644 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:08:52,645 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:08:52,645 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:08:52,645 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:08:52,645 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:08:52,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:08:52,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:08:52,646 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:08:52,646 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:08:56,711 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:08:56,712 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:08:56,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:08:56 BoogieIcfgContainer [2021-11-12 23:08:56,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:08:56,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:08:56,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:08:56,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:08:56,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:08:51" (1/3) ... [2021-11-12 23:08:56,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a621472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:08:56, skipping insertion in model container [2021-11-12 23:08:56,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:52" (2/3) ... [2021-11-12 23:08:56,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a621472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:08:56, skipping insertion in model container [2021-11-12 23:08:56,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:08:56" (3/3) ... [2021-11-12 23:08:56,723 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product09.cil.c [2021-11-12 23:08:56,728 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:08:56,729 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:08:56,800 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:08:56,808 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 23:08:56,808 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:08:56,844 INFO L276 IsEmpty]: Start isEmpty. Operand has 526 states, 418 states have (on average 1.7177033492822966) internal successors, (718), 439 states have internal predecessors, (718), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 23:08:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 23:08:56,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:56,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:56,895 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:56,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1063489521, now seen corresponding path program 1 times [2021-11-12 23:08:56,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:56,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861825474] [2021-11-12 23:08:56,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:56,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:56,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:56,923 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:56,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:08:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:57,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:08:57,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:57,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:58,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:58,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861825474] [2021-11-12 23:08:58,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861825474] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:58,086 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:58,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:08:58,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850660806] [2021-11-12 23:08:58,090 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:58,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:08:58,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:58,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:08:58,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:08:58,155 INFO L87 Difference]: Start difference. First operand has 526 states, 418 states have (on average 1.7177033492822966) internal successors, (718), 439 states have internal predecessors, (718), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) Second operand has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-12 23:08:58,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:58,245 INFO L93 Difference]: Finished difference Result 547 states and 920 transitions. [2021-11-12 23:08:58,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:08:58,248 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 74 [2021-11-12 23:08:58,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:58,277 INFO L225 Difference]: With dead ends: 547 [2021-11-12 23:08:58,277 INFO L226 Difference]: Without dead ends: 518 [2021-11-12 23:08:58,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 146 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 23:08:58,288 INFO L933 BasicCegarLoop]: 881 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, 881 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.55ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:58,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 10.55ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:08:58,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-11-12 23:08:58,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2021-11-12 23:08:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 412 states have (on average 1.7160194174757282) internal successors, (707), 431 states have internal predecessors, (707), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2021-11-12 23:08:58,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 874 transitions. [2021-11-12 23:08:58,440 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 874 transitions. Word has length 74 [2021-11-12 23:08:58,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:58,443 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 874 transitions. [2021-11-12 23:08:58,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-12 23:08:58,443 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 874 transitions. [2021-11-12 23:08:58,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-12 23:08:58,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:58,453 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:58,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:58,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:58,664 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:58,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:58,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1607488709, now seen corresponding path program 1 times [2021-11-12 23:08:58,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:58,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703600925] [2021-11-12 23:08:58,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:58,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:58,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:58,669 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:58,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:08:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:59,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:08:59,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:59,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:59,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:59,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703600925] [2021-11-12 23:08:59,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703600925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:59,738 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:59,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:08:59,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293506247] [2021-11-12 23:08:59,740 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:59,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:08:59,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:59,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:08:59,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:08:59,748 INFO L87 Difference]: Start difference. First operand 518 states and 874 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:08:59,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:59,954 INFO L93 Difference]: Finished difference Result 1020 states and 1726 transitions. [2021-11-12 23:08:59,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:08:59,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 76 [2021-11-12 23:08:59,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:59,967 INFO L225 Difference]: With dead ends: 1020 [2021-11-12 23:08:59,967 INFO L226 Difference]: Without dead ends: 518 [2021-11-12 23:08:59,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:08:59,978 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 15 mSDsluCounter, 3434 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 4295 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.87ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:59,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 4295 Invalid, 45 Unknown, 0 Unchecked, 30.87ms Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 54.25ms Time] [2021-11-12 23:08:59,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-11-12 23:09:00,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2021-11-12 23:09:00,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 412 states have (on average 1.7014563106796117) internal successors, (701), 431 states have internal predecessors, (701), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2021-11-12 23:09:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 868 transitions. [2021-11-12 23:09:00,048 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 868 transitions. Word has length 76 [2021-11-12 23:09:00,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:00,049 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 868 transitions. [2021-11-12 23:09:00,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:09:00,049 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 868 transitions. [2021-11-12 23:09:00,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 23:09:00,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:00,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:00,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:00,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:00,278 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:00,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:00,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1997699781, now seen corresponding path program 1 times [2021-11-12 23:09:00,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:00,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817489298] [2021-11-12 23:09:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:00,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:00,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:00,282 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:00,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:09:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:00,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:09:00,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:01,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:01,491 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:01,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817489298] [2021-11-12 23:09:01,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817489298] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:01,491 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:01,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:09:01,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300241689] [2021-11-12 23:09:01,492 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:01,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:09:01,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:01,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:09:01,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:09:01,494 INFO L87 Difference]: Start difference. First operand 518 states and 868 transitions. Second operand has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 23:09:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:01,712 INFO L93 Difference]: Finished difference Result 978 states and 1643 transitions. [2021-11-12 23:09:01,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:09:01,714 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 81 [2021-11-12 23:09:01,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:01,720 INFO L225 Difference]: With dead ends: 978 [2021-11-12 23:09:01,721 INFO L226 Difference]: Without dead ends: 512 [2021-11-12 23:09:01,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 151 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 23:09:01,726 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 117 mSDsluCounter, 5888 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 6743 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.64ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 121.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:01,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 6743 Invalid, 93 Unknown, 0 Unchecked, 17.64ms Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 121.87ms Time] [2021-11-12 23:09:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-12 23:09:01,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2021-11-12 23:09:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 406 states have (on average 1.6945812807881773) internal successors, (688), 425 states have internal predecessors, (688), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2021-11-12 23:09:01,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 855 transitions. [2021-11-12 23:09:01,784 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 855 transitions. Word has length 81 [2021-11-12 23:09:01,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:01,784 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 855 transitions. [2021-11-12 23:09:01,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 23:09:01,785 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 855 transitions. [2021-11-12 23:09:01,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 23:09:01,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:01,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:01,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:02,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:02,012 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:02,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:02,013 INFO L85 PathProgramCache]: Analyzing trace with hash -122849018, now seen corresponding path program 1 times [2021-11-12 23:09:02,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:02,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041909665] [2021-11-12 23:09:02,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:02,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:02,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:02,016 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:02,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:09:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:02,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:09:02,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:02,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:02,989 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:02,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041909665] [2021-11-12 23:09:02,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041909665] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:02,989 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:02,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:09:02,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938377039] [2021-11-12 23:09:02,990 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:02,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:09:02,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:02,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:09:02,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:09:02,991 INFO L87 Difference]: Start difference. First operand 512 states and 855 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:09:03,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:03,221 INFO L93 Difference]: Finished difference Result 981 states and 1644 transitions. [2021-11-12 23:09:03,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:09:03,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2021-11-12 23:09:03,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:03,227 INFO L225 Difference]: With dead ends: 981 [2021-11-12 23:09:03,228 INFO L226 Difference]: Without dead ends: 512 [2021-11-12 23:09:03,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 158 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 23:09:03,232 INFO L933 BasicCegarLoop]: 806 mSDtfsCounter, 112 mSDsluCounter, 2390 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 146.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 3196 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.99ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 165.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:03,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 3196 Invalid, 148 Unknown, 0 Unchecked, 7.99ms Time], IncrementalHoareTripleChecker [23 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 165.89ms Time] [2021-11-12 23:09:03,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-12 23:09:03,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2021-11-12 23:09:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 406 states have (on average 1.6354679802955665) internal successors, (664), 425 states have internal predecessors, (664), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2021-11-12 23:09:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 831 transitions. [2021-11-12 23:09:03,262 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 831 transitions. Word has length 82 [2021-11-12 23:09:03,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:03,262 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 831 transitions. [2021-11-12 23:09:03,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:09:03,263 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 831 transitions. [2021-11-12 23:09:03,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 23:09:03,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:03,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:03,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:03,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:03,484 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:03,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1043480971, now seen corresponding path program 1 times [2021-11-12 23:09:03,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:03,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997071276] [2021-11-12 23:09:03,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:03,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:03,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:03,487 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:03,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:09:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:03,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:09:03,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:04,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:04,609 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:04,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997071276] [2021-11-12 23:09:04,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997071276] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:04,610 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:04,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:09:04,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404112362] [2021-11-12 23:09:04,610 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:04,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:09:04,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:04,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:09:04,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:09:04,612 INFO L87 Difference]: Start difference. First operand 512 states and 831 transitions. Second operand has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 23:09:04,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:04,751 INFO L93 Difference]: Finished difference Result 972 states and 1606 transitions. [2021-11-12 23:09:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:09:04,752 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 84 [2021-11-12 23:09:04,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:04,758 INFO L225 Difference]: With dead ends: 972 [2021-11-12 23:09:04,758 INFO L226 Difference]: Without dead ends: 491 [2021-11-12 23:09:04,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 160 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 23:09:04,763 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 89 mSDsluCounter, 4813 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 5632 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.37ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:04,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 5632 Invalid, 60 Unknown, 0 Unchecked, 12.37ms Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 75.26ms Time] [2021-11-12 23:09:04,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-11-12 23:09:04,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 491. [2021-11-12 23:09:04,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 385 states have (on average 1.6597402597402597) internal successors, (639), 404 states have internal predecessors, (639), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2021-11-12 23:09:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 806 transitions. [2021-11-12 23:09:04,791 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 806 transitions. Word has length 84 [2021-11-12 23:09:04,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:04,791 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 806 transitions. [2021-11-12 23:09:04,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 23:09:04,792 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 806 transitions. [2021-11-12 23:09:04,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 23:09:04,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:04,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:04,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:05,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:05,012 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:05,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1576516792, now seen corresponding path program 1 times [2021-11-12 23:09:05,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:05,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101492895] [2021-11-12 23:09:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:05,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:05,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:05,014 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:05,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:09:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:05,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:09:05,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:05,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:06,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:06,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101492895] [2021-11-12 23:09:06,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101492895] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:06,286 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:06,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:09:06,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036403212] [2021-11-12 23:09:06,286 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:06,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:09:06,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:06,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:09:06,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:09:06,288 INFO L87 Difference]: Start difference. First operand 491 states and 806 transitions. Second operand has 13 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 23:09:06,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:06,554 INFO L93 Difference]: Finished difference Result 945 states and 1570 transitions. [2021-11-12 23:09:06,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:09:06,555 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2021-11-12 23:09:06,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:06,562 INFO L225 Difference]: With dead ends: 945 [2021-11-12 23:09:06,562 INFO L226 Difference]: Without dead ends: 491 [2021-11-12 23:09:06,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:09:06,570 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 30 mSDsluCounter, 7880 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 8671 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.81ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 158.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:06,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 8671 Invalid, 134 Unknown, 0 Unchecked, 19.81ms Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 158.00ms Time] [2021-11-12 23:09:06,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-11-12 23:09:06,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 491. [2021-11-12 23:09:06,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 385 states have (on average 1.6571428571428573) internal successors, (638), 404 states have internal predecessors, (638), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2021-11-12 23:09:06,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 805 transitions. [2021-11-12 23:09:06,614 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 805 transitions. Word has length 87 [2021-11-12 23:09:06,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:06,615 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 805 transitions. [2021-11-12 23:09:06,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 23:09:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 805 transitions. [2021-11-12 23:09:06,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 23:09:06,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:06,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:06,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:06,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:06,852 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:06,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:06,852 INFO L85 PathProgramCache]: Analyzing trace with hash 311775717, now seen corresponding path program 1 times [2021-11-12 23:09:06,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:06,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032173733] [2021-11-12 23:09:06,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:06,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:06,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:06,855 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:06,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:09:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:07,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:09:07,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:07,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:08,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:08,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032173733] [2021-11-12 23:09:08,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032173733] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:08,608 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:08,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-12 23:09:08,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655699580] [2021-11-12 23:09:08,608 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:08,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:09:08,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:08,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:09:08,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:09:08,610 INFO L87 Difference]: Start difference. First operand 491 states and 805 transitions. Second operand has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 12 states have internal predecessors, (122), 6 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-12 23:09:10,643 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 23:09:12,649 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 23:09:16,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:16,989 INFO L93 Difference]: Finished difference Result 1074 states and 1813 transitions. [2021-11-12 23:09:16,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:09:16,990 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 12 states have internal predecessors, (122), 6 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 5 states have call successors, (16) Word has length 88 [2021-11-12 23:09:16,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:16,997 INFO L225 Difference]: With dead ends: 1074 [2021-11-12 23:09:16,998 INFO L226 Difference]: Without dead ends: 628 [2021-11-12 23:09:17,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:09:17,002 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 1537 mSDsluCounter, 2059 mSDsCounter, 0 mSdLazyCounter, 3209 mSolverCounterSat, 588 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7531.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 2938 SdHoareTripleChecker+Invalid, 3799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.04ms SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 3209 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8142.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:17,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 2938 Invalid, 3799 Unknown, 0 Unchecked, 30.04ms Time], IncrementalHoareTripleChecker [588 Valid, 3209 Invalid, 2 Unknown, 0 Unchecked, 8142.05ms Time] [2021-11-12 23:09:17,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-11-12 23:09:17,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 495. [2021-11-12 23:09:17,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 388 states have (on average 1.652061855670103) internal successors, (641), 407 states have internal predecessors, (641), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (97), 80 states have call predecessors, (97), 81 states have call successors, (97) [2021-11-12 23:09:17,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 824 transitions. [2021-11-12 23:09:17,047 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 824 transitions. Word has length 88 [2021-11-12 23:09:17,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:17,047 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 824 transitions. [2021-11-12 23:09:17,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 12 states have internal predecessors, (122), 6 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-12 23:09:17,048 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 824 transitions. [2021-11-12 23:09:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 23:09:17,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:17,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:17,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-12 23:09:17,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:17,273 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:17,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:17,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1564599194, now seen corresponding path program 1 times [2021-11-12 23:09:17,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:17,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799984055] [2021-11-12 23:09:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:17,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:17,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:17,275 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:17,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:09:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:17,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:09:17,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:18,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:18,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:18,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799984055] [2021-11-12 23:09:18,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799984055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:18,624 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:18,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:09:18,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107579089] [2021-11-12 23:09:18,624 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:18,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:09:18,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:18,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:09:18,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:09:18,625 INFO L87 Difference]: Start difference. First operand 495 states and 824 transitions. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-12 23:09:20,652 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 23:09:22,657 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 23:09:29,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:29,257 INFO L93 Difference]: Finished difference Result 1802 states and 3112 transitions. [2021-11-12 23:09:29,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:09:29,259 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 89 [2021-11-12 23:09:29,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:29,279 INFO L225 Difference]: With dead ends: 1802 [2021-11-12 23:09:29,279 INFO L226 Difference]: Without dead ends: 1352 [2021-11-12 23:09:29,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:09:29,284 INFO L933 BasicCegarLoop]: 1352 mSDtfsCounter, 2836 mSDsluCounter, 2744 mSDsCounter, 0 mSdLazyCounter, 5242 mSolverCounterSat, 786 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9268.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2909 SdHoareTripleChecker+Valid, 4096 SdHoareTripleChecker+Invalid, 6030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.43ms SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 5242 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10225.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:29,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2909 Valid, 4096 Invalid, 6030 Unknown, 0 Unchecked, 41.43ms Time], IncrementalHoareTripleChecker [786 Valid, 5242 Invalid, 2 Unknown, 0 Unchecked, 10225.06ms Time] [2021-11-12 23:09:29,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-11-12 23:09:29,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1264. [2021-11-12 23:09:29,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 988 states have (on average 1.6680161943319838) internal successors, (1648), 1036 states have internal predecessors, (1648), 223 states have call successors, (223), 51 states have call predecessors, (223), 52 states have return successors, (241), 213 states have call predecessors, (241), 218 states have call successors, (241) [2021-11-12 23:09:29,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 2112 transitions. [2021-11-12 23:09:29,406 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 2112 transitions. Word has length 89 [2021-11-12 23:09:29,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:29,406 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 2112 transitions. [2021-11-12 23:09:29,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-12 23:09:29,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 2112 transitions. [2021-11-12 23:09:29,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-12 23:09:29,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:29,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:29,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:29,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:29,628 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:29,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:29,629 INFO L85 PathProgramCache]: Analyzing trace with hash 839046955, now seen corresponding path program 1 times [2021-11-12 23:09:29,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:29,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599416714] [2021-11-12 23:09:29,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:29,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:29,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:29,630 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:29,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:09:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:30,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:09:30,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:30,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:30,854 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:30,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599416714] [2021-11-12 23:09:30,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599416714] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:30,855 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:30,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:09:30,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296112174] [2021-11-12 23:09:30,855 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:30,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:09:30,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:30,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:09:30,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:09:30,857 INFO L87 Difference]: Start difference. First operand 1264 states and 2112 transitions. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-12 23:09:32,888 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 23:09:34,894 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:09:36,899 WARN L515 Checker$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 23:09:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:41,910 INFO L93 Difference]: Finished difference Result 3484 states and 5923 transitions. [2021-11-12 23:09:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:09:41,911 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 91 [2021-11-12 23:09:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:41,939 INFO L225 Difference]: With dead ends: 3484 [2021-11-12 23:09:41,940 INFO L226 Difference]: Without dead ends: 2576 [2021-11-12 23:09:41,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:09:41,948 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 4163 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 932 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9942.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4234 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 3965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.71ms SdHoareTripleChecker+Time, 932 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10649.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:41,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4234 Valid, 2141 Invalid, 3965 Unknown, 0 Unchecked, 29.71ms Time], IncrementalHoareTripleChecker [932 Valid, 3030 Invalid, 3 Unknown, 0 Unchecked, 10649.17ms Time] [2021-11-12 23:09:41,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-11-12 23:09:42,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2364. [2021-11-12 23:09:42,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 1849 states have (on average 1.6706327744726879) internal successors, (3089), 1942 states have internal predecessors, (3089), 407 states have call successors, (407), 91 states have call predecessors, (407), 107 states have return successors, (498), 392 states have call predecessors, (498), 402 states have call successors, (498) [2021-11-12 23:09:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 3994 transitions. [2021-11-12 23:09:42,147 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 3994 transitions. Word has length 91 [2021-11-12 23:09:42,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:42,148 INFO L470 AbstractCegarLoop]: Abstraction has 2364 states and 3994 transitions. [2021-11-12 23:09:42,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-12 23:09:42,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 3994 transitions. [2021-11-12 23:09:42,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 23:09:42,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:42,151 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:09:42,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:42,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:42,369 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:42,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:42,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1643733029, now seen corresponding path program 1 times [2021-11-12 23:09:42,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:42,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070603536] [2021-11-12 23:09:42,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:42,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:42,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:42,371 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:42,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:09:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:42,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:09:42,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:43,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:44,109 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:44,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070603536] [2021-11-12 23:09:44,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070603536] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:44,109 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:44,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-12 23:09:44,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484609483] [2021-11-12 23:09:44,111 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:44,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:09:44,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:44,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:09:44,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:09:44,112 INFO L87 Difference]: Start difference. First operand 2364 states and 3994 transitions. Second operand has 14 states, 14 states have (on average 8.857142857142858) internal successors, (124), 12 states have internal predecessors, (124), 7 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-12 23:09:46,132 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:09:48,138 WARN L515 Checker$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 23:09:50,144 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 23:09:57,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:57,924 INFO L93 Difference]: Finished difference Result 6405 states and 10881 transitions. [2021-11-12 23:09:57,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:09:57,925 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.857142857142858) internal successors, (124), 12 states have internal predecessors, (124), 7 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) Word has length 96 [2021-11-12 23:09:57,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:57,979 INFO L225 Difference]: With dead ends: 6405 [2021-11-12 23:09:57,979 INFO L226 Difference]: Without dead ends: 4347 [2021-11-12 23:09:57,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:09:57,998 INFO L933 BasicCegarLoop]: 929 mSDtfsCounter, 3986 mSDsluCounter, 3109 mSDsCounter, 0 mSdLazyCounter, 7223 mSolverCounterSat, 1073 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12172.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4058 SdHoareTripleChecker+Valid, 4038 SdHoareTripleChecker+Invalid, 8299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.17ms SdHoareTripleChecker+Time, 1073 IncrementalHoareTripleChecker+Valid, 7223 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13168.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:57,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4058 Valid, 4038 Invalid, 8299 Unknown, 0 Unchecked, 35.17ms Time], IncrementalHoareTripleChecker [1073 Valid, 7223 Invalid, 3 Unknown, 0 Unchecked, 13168.55ms Time] [2021-11-12 23:09:58,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2021-11-12 23:09:58,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 4185. [2021-11-12 23:09:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4185 states, 3263 states have (on average 1.661048115231382) internal successors, (5420), 3423 states have internal predecessors, (5420), 725 states have call successors, (725), 167 states have call predecessors, (725), 196 states have return successors, (899), 702 states have call predecessors, (899), 720 states have call successors, (899) [2021-11-12 23:09:58,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 7044 transitions. [2021-11-12 23:09:58,288 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 7044 transitions. Word has length 96 [2021-11-12 23:09:58,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:58,289 INFO L470 AbstractCegarLoop]: Abstraction has 4185 states and 7044 transitions. [2021-11-12 23:09:58,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.857142857142858) internal successors, (124), 12 states have internal predecessors, (124), 7 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-12 23:09:58,289 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 7044 transitions. [2021-11-12 23:09:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 23:09:58,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:58,293 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:09:58,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:58,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:58,510 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:58,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:58,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1757746257, now seen corresponding path program 1 times [2021-11-12 23:09:58,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:58,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571378953] [2021-11-12 23:09:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:58,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:58,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:58,512 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:58,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:09:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:58,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:09:58,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:59,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:59,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:59,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571378953] [2021-11-12 23:09:59,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571378953] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:59,416 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:59,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:09:59,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321035830] [2021-11-12 23:09:59,417 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:59,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:09:59,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:59,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:09:59,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:09:59,418 INFO L87 Difference]: Start difference. First operand 4185 states and 7044 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-12 23:09:59,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:59,739 INFO L93 Difference]: Finished difference Result 8330 states and 14172 transitions. [2021-11-12 23:09:59,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:09:59,740 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 103 [2021-11-12 23:09:59,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:59,764 INFO L225 Difference]: With dead ends: 8330 [2021-11-12 23:09:59,764 INFO L226 Difference]: Without dead ends: 4185 [2021-11-12 23:09:59,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:09:59,789 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 468 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.43ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.85ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:59,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 1606 Invalid, 90 Unknown, 0 Unchecked, 2.43ms Time], IncrementalHoareTripleChecker [37 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 64.85ms Time] [2021-11-12 23:09:59,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2021-11-12 23:10:00,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 4185. [2021-11-12 23:10:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4185 states, 3263 states have (on average 1.6420471958320564) internal successors, (5358), 3423 states have internal predecessors, (5358), 725 states have call successors, (725), 167 states have call predecessors, (725), 196 states have return successors, (899), 702 states have call predecessors, (899), 720 states have call successors, (899) [2021-11-12 23:10:00,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 6982 transitions. [2021-11-12 23:10:00,154 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 6982 transitions. Word has length 103 [2021-11-12 23:10:00,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:00,155 INFO L470 AbstractCegarLoop]: Abstraction has 4185 states and 6982 transitions. [2021-11-12 23:10:00,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-12 23:10:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 6982 transitions. [2021-11-12 23:10:00,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 23:10:00,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:00,162 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:10:00,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:00,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:00,381 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:00,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:00,382 INFO L85 PathProgramCache]: Analyzing trace with hash -179301962, now seen corresponding path program 1 times [2021-11-12 23:10:00,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:00,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906303080] [2021-11-12 23:10:00,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:00,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:00,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:00,383 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:00,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:10:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:00,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:10:00,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:10:01,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:10:01,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:01,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906303080] [2021-11-12 23:10:01,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906303080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:01,544 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:01,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-12 23:10:01,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038489567] [2021-11-12 23:10:01,545 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:01,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:10:01,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:01,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:10:01,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:10:01,546 INFO L87 Difference]: Start difference. First operand 4185 states and 6982 transitions. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 23:10:03,565 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 23:10:05,572 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 23:10:08,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:08,857 INFO L93 Difference]: Finished difference Result 8419 states and 14091 transitions. [2021-11-12 23:10:08,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:10:08,857 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 108 [2021-11-12 23:10:08,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:08,890 INFO L225 Difference]: With dead ends: 8419 [2021-11-12 23:10:08,890 INFO L226 Difference]: Without dead ends: 4647 [2021-11-12 23:10:08,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:10:08,909 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 3276 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 2717 mSolverCounterSat, 829 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6495.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3350 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 3548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.87ms SdHoareTripleChecker+Time, 829 IncrementalHoareTripleChecker+Valid, 2717 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6963.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:08,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3350 Valid, 2112 Invalid, 3548 Unknown, 0 Unchecked, 16.87ms Time], IncrementalHoareTripleChecker [829 Valid, 2717 Invalid, 2 Unknown, 0 Unchecked, 6963.82ms Time] [2021-11-12 23:10:08,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4647 states. [2021-11-12 23:10:09,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4647 to 4365. [2021-11-12 23:10:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4365 states, 3399 states have (on average 1.6298911444542512) internal successors, (5540), 3569 states have internal predecessors, (5540), 744 states have call successors, (744), 183 states have call predecessors, (744), 221 states have return successors, (942), 720 states have call predecessors, (942), 739 states have call successors, (942) [2021-11-12 23:10:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4365 states to 4365 states and 7226 transitions. [2021-11-12 23:10:09,223 INFO L78 Accepts]: Start accepts. Automaton has 4365 states and 7226 transitions. Word has length 108 [2021-11-12 23:10:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:09,224 INFO L470 AbstractCegarLoop]: Abstraction has 4365 states and 7226 transitions. [2021-11-12 23:10:09,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 23:10:09,224 INFO L276 IsEmpty]: Start isEmpty. Operand 4365 states and 7226 transitions. [2021-11-12 23:10:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 23:10:09,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:09,228 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:10:09,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:09,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:09,451 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:09,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:09,452 INFO L85 PathProgramCache]: Analyzing trace with hash 360327549, now seen corresponding path program 1 times [2021-11-12 23:10:09,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:09,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701030689] [2021-11-12 23:10:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:09,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:09,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:09,453 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:09,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:10:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:09,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:10:09,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:10:10,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:10:10,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:10,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701030689] [2021-11-12 23:10:10,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701030689] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:10,990 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:10,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:10:10,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019275205] [2021-11-12 23:10:10,990 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:10,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:10:10,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:10,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:10:10,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:10:10,992 INFO L87 Difference]: Start difference. First operand 4365 states and 7226 transitions. Second operand has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 11 states have internal predecessors, (139), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 9 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-12 23:10:13,019 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:15,025 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 23:10:21,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:21,896 INFO L93 Difference]: Finished difference Result 11586 states and 19385 transitions. [2021-11-12 23:10:21,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:10:21,898 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 11 states have internal predecessors, (139), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 9 states have call predecessors, (20), 5 states have call successors, (20) Word has length 113 [2021-11-12 23:10:21,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:21,951 INFO L225 Difference]: With dead ends: 11586 [2021-11-12 23:10:21,952 INFO L226 Difference]: Without dead ends: 7632 [2021-11-12 23:10:21,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-12 23:10:21,967 INFO L933 BasicCegarLoop]: 843 mSDtfsCounter, 3800 mSDsluCounter, 2621 mSDsCounter, 0 mSdLazyCounter, 6294 mSolverCounterSat, 1019 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9428.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3869 SdHoareTripleChecker+Valid, 3464 SdHoareTripleChecker+Invalid, 7315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.66ms SdHoareTripleChecker+Time, 1019 IncrementalHoareTripleChecker+Valid, 6294 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10262.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:21,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3869 Valid, 3464 Invalid, 7315 Unknown, 0 Unchecked, 25.66ms Time], IncrementalHoareTripleChecker [1019 Valid, 6294 Invalid, 2 Unknown, 0 Unchecked, 10262.14ms Time] [2021-11-12 23:10:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7632 states. [2021-11-12 23:10:22,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7632 to 7580. [2021-11-12 23:10:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7580 states, 5912 states have (on average 1.6432679296346413) internal successors, (9715), 6185 states have internal predecessors, (9715), 1311 states have call successors, (1311), 329 states have call predecessors, (1311), 356 states have return successors, (1591), 1269 states have call predecessors, (1591), 1306 states have call successors, (1591) [2021-11-12 23:10:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7580 states to 7580 states and 12617 transitions. [2021-11-12 23:10:22,506 INFO L78 Accepts]: Start accepts. Automaton has 7580 states and 12617 transitions. Word has length 113 [2021-11-12 23:10:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:22,507 INFO L470 AbstractCegarLoop]: Abstraction has 7580 states and 12617 transitions. [2021-11-12 23:10:22,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 11 states have internal predecessors, (139), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 9 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-12 23:10:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 7580 states and 12617 transitions. [2021-11-12 23:10:22,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 23:10:22,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:22,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:10:22,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:22,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:22,733 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:22,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:22,733 INFO L85 PathProgramCache]: Analyzing trace with hash 226314043, now seen corresponding path program 1 times [2021-11-12 23:10:22,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:22,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440253109] [2021-11-12 23:10:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:22,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:22,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:22,735 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:22,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:10:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:23,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:10:23,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:10:23,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:10:24,273 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:24,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440253109] [2021-11-12 23:10:24,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440253109] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:24,274 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:24,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:10:24,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21738750] [2021-11-12 23:10:24,274 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:24,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:10:24,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:24,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:10:24,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:10:24,276 INFO L87 Difference]: Start difference. First operand 7580 states and 12617 transitions. Second operand has 13 states, 13 states have (on average 11.0) internal successors, (143), 13 states have internal predecessors, (143), 5 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (20), 9 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-12 23:10:26,305 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 23:10:28,311 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 23:10:34,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:34,288 INFO L93 Difference]: Finished difference Result 19206 states and 32404 transitions. [2021-11-12 23:10:34,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 23:10:34,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.0) internal successors, (143), 13 states have internal predecessors, (143), 5 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (20), 9 states have call predecessors, (20), 4 states have call successors, (20) Word has length 113 [2021-11-12 23:10:34,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:34,374 INFO L225 Difference]: With dead ends: 19206 [2021-11-12 23:10:34,375 INFO L226 Difference]: Without dead ends: 11276 [2021-11-12 23:10:34,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:10:34,417 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 3858 mSDsluCounter, 1864 mSDsCounter, 0 mSdLazyCounter, 4104 mSolverCounterSat, 1067 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8500.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3948 SdHoareTripleChecker+Valid, 2806 SdHoareTripleChecker+Invalid, 5173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.55ms SdHoareTripleChecker+Time, 1067 IncrementalHoareTripleChecker+Valid, 4104 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9257.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:34,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3948 Valid, 2806 Invalid, 5173 Unknown, 0 Unchecked, 26.55ms Time], IncrementalHoareTripleChecker [1067 Valid, 4104 Invalid, 2 Unknown, 0 Unchecked, 9257.78ms Time] [2021-11-12 23:10:34,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11276 states. [2021-11-12 23:10:34,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11276 to 10857. [2021-11-12 23:10:35,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10857 states, 8443 states have (on average 1.6372142603340045) internal successors, (13823), 8859 states have internal predecessors, (13823), 1901 states have call successors, (1901), 489 states have call predecessors, (1901), 512 states have return successors, (2346), 1808 states have call predecessors, (2346), 1896 states have call successors, (2346) [2021-11-12 23:10:35,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10857 states to 10857 states and 18070 transitions. [2021-11-12 23:10:35,068 INFO L78 Accepts]: Start accepts. Automaton has 10857 states and 18070 transitions. Word has length 113 [2021-11-12 23:10:35,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:35,069 INFO L470 AbstractCegarLoop]: Abstraction has 10857 states and 18070 transitions. [2021-11-12 23:10:35,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.0) internal successors, (143), 13 states have internal predecessors, (143), 5 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (20), 9 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-12 23:10:35,070 INFO L276 IsEmpty]: Start isEmpty. Operand 10857 states and 18070 transitions. [2021-11-12 23:10:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 23:10:35,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:35,074 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:10:35,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-12 23:10:35,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:35,294 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:35,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:35,295 INFO L85 PathProgramCache]: Analyzing trace with hash 757531011, now seen corresponding path program 1 times [2021-11-12 23:10:35,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:35,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844032352] [2021-11-12 23:10:35,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:35,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:35,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:35,297 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:35,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:10:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:35,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:10:35,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:10:36,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:10:36,671 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:36,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844032352] [2021-11-12 23:10:36,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844032352] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:36,671 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:36,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 9 [2021-11-12 23:10:36,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137505277] [2021-11-12 23:10:36,672 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:36,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:10:36,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:36,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:10:36,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:10:36,673 INFO L87 Difference]: Start difference. First operand 10857 states and 18070 transitions. Second operand has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-12 23:10:38,695 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 23:10:40,702 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 23:10:42,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:42,174 INFO L93 Difference]: Finished difference Result 11114 states and 18547 transitions. [2021-11-12 23:10:42,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:10:42,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) Word has length 114 [2021-11-12 23:10:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:42,268 INFO L225 Difference]: With dead ends: 11114 [2021-11-12 23:10:42,268 INFO L226 Difference]: Without dead ends: 11099 [2021-11-12 23:10:42,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:10:42,275 INFO L933 BasicCegarLoop]: 786 mSDtfsCounter, 1563 mSDsluCounter, 1869 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 251 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4822.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 2655 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.49ms SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4977.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:42,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1572 Valid, 2655 Invalid, 813 Unknown, 0 Unchecked, 6.49ms Time], IncrementalHoareTripleChecker [251 Valid, 560 Invalid, 2 Unknown, 0 Unchecked, 4977.07ms Time] [2021-11-12 23:10:42,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11099 states. [2021-11-12 23:10:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11099 to 10939. [2021-11-12 23:10:42,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10939 states, 8511 states have (on average 1.6349430149218658) internal successors, (13915), 8924 states have internal predecessors, (13915), 1915 states have call successors, (1915), 489 states have call predecessors, (1915), 512 states have return successors, (2370), 1825 states have call predecessors, (2370), 1910 states have call successors, (2370) [2021-11-12 23:10:42,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10939 states to 10939 states and 18200 transitions. [2021-11-12 23:10:42,875 INFO L78 Accepts]: Start accepts. Automaton has 10939 states and 18200 transitions. Word has length 114 [2021-11-12 23:10:42,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:42,876 INFO L470 AbstractCegarLoop]: Abstraction has 10939 states and 18200 transitions. [2021-11-12 23:10:42,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-12 23:10:42,877 INFO L276 IsEmpty]: Start isEmpty. Operand 10939 states and 18200 transitions. [2021-11-12 23:10:42,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 23:10:42,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:42,881 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:10:42,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:43,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:43,096 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:43,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:43,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1035396738, now seen corresponding path program 1 times [2021-11-12 23:10:43,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:43,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656900620] [2021-11-12 23:10:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:43,097 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:43,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:43,099 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:43,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:10:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:43,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:10:43,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:10:43,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:10:44,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:44,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656900620] [2021-11-12 23:10:44,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656900620] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:44,143 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:44,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:10:44,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65062553] [2021-11-12 23:10:44,144 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:44,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:10:44,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:44,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:10:44,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:10:44,146 INFO L87 Difference]: Start difference. First operand 10939 states and 18200 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 6 states have internal predecessors, (95), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 23:10:44,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:44,606 INFO L93 Difference]: Finished difference Result 10954 states and 18218 transitions. [2021-11-12 23:10:44,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:10:44,607 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 6 states have internal predecessors, (95), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 1 states have call successors, (13) Word has length 120 [2021-11-12 23:10:44,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:44,678 INFO L225 Difference]: With dead ends: 10954 [2021-11-12 23:10:44,678 INFO L226 Difference]: Without dead ends: 10939 [2021-11-12 23:10:44,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:10:44,686 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 37 mSDsluCounter, 3891 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 4688 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.38ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:44,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 4688 Invalid, 14 Unknown, 0 Unchecked, 4.38ms Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 33.97ms Time] [2021-11-12 23:10:44,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10939 states. [2021-11-12 23:10:45,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10939 to 10939. [2021-11-12 23:10:45,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10939 states, 8511 states have (on average 1.6328281048055457) internal successors, (13897), 8924 states have internal predecessors, (13897), 1915 states have call successors, (1915), 489 states have call predecessors, (1915), 512 states have return successors, (2370), 1825 states have call predecessors, (2370), 1910 states have call successors, (2370) [2021-11-12 23:10:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10939 states to 10939 states and 18182 transitions. [2021-11-12 23:10:45,307 INFO L78 Accepts]: Start accepts. Automaton has 10939 states and 18182 transitions. Word has length 120 [2021-11-12 23:10:45,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:45,307 INFO L470 AbstractCegarLoop]: Abstraction has 10939 states and 18182 transitions. [2021-11-12 23:10:45,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 6 states have internal predecessors, (95), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 23:10:45,308 INFO L276 IsEmpty]: Start isEmpty. Operand 10939 states and 18182 transitions. [2021-11-12 23:10:45,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 23:10:45,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:45,312 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:10:45,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:45,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:45,529 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:45,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:45,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1771185064, now seen corresponding path program 1 times [2021-11-12 23:10:45,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:45,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699501756] [2021-11-12 23:10:45,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:45,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:45,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:45,532 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:45,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:10:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:46,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:10:46,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:10:46,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:10:47,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:47,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699501756] [2021-11-12 23:10:47,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699501756] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:47,279 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:47,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:10:47,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7256277] [2021-11-12 23:10:47,280 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:47,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:10:47,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:47,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:10:47,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:10:47,282 INFO L87 Difference]: Start difference. First operand 10939 states and 18182 transitions. Second operand has 13 states, 13 states have (on average 11.76923076923077) internal successors, (153), 11 states have internal predecessors, (153), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 23:10:49,311 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 23:10:51,318 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:53,323 WARN L515 Checker$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 23:10:55,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:55,783 INFO L93 Difference]: Finished difference Result 21815 states and 36325 transitions. [2021-11-12 23:10:55,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:10:55,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.76923076923077) internal successors, (153), 11 states have internal predecessors, (153), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 4 states have call successors, (23) Word has length 131 [2021-11-12 23:10:55,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:55,842 INFO L225 Difference]: With dead ends: 21815 [2021-11-12 23:10:55,842 INFO L226 Difference]: Without dead ends: 10977 [2021-11-12 23:10:55,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:10:55,878 INFO L933 BasicCegarLoop]: 716 mSDtfsCounter, 1803 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 2120 mSolverCounterSat, 487 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7702.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1803 SdHoareTripleChecker+Valid, 1911 SdHoareTripleChecker+Invalid, 2610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.39ms SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 2120 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7986.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:55,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1803 Valid, 1911 Invalid, 2610 Unknown, 0 Unchecked, 10.39ms Time], IncrementalHoareTripleChecker [487 Valid, 2120 Invalid, 3 Unknown, 0 Unchecked, 7986.62ms Time] [2021-11-12 23:10:55,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10977 states. [2021-11-12 23:10:56,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10977 to 10939. [2021-11-12 23:10:56,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10939 states, 8511 states have (on average 1.6307131946892257) internal successors, (13879), 8924 states have internal predecessors, (13879), 1915 states have call successors, (1915), 489 states have call predecessors, (1915), 512 states have return successors, (2370), 1825 states have call predecessors, (2370), 1910 states have call successors, (2370) [2021-11-12 23:10:56,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10939 states to 10939 states and 18164 transitions. [2021-11-12 23:10:56,732 INFO L78 Accepts]: Start accepts. Automaton has 10939 states and 18164 transitions. Word has length 131 [2021-11-12 23:10:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:56,733 INFO L470 AbstractCegarLoop]: Abstraction has 10939 states and 18164 transitions. [2021-11-12 23:10:56,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.76923076923077) internal successors, (153), 11 states have internal predecessors, (153), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 23:10:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 10939 states and 18164 transitions. [2021-11-12 23:10:56,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-12 23:10:56,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:56,736 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:10:56,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:56,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:56,956 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:56,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:56,956 INFO L85 PathProgramCache]: Analyzing trace with hash -279140526, now seen corresponding path program 1 times [2021-11-12 23:10:56,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:56,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716713946] [2021-11-12 23:10:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:56,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:56,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:56,959 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:56,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:10:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:57,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:10:57,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:10:57,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:10:58,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:58,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716713946] [2021-11-12 23:10:58,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716713946] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:58,185 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:58,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 23:10:58,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444747915] [2021-11-12 23:10:58,186 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:58,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:10:58,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:58,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:10:58,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:10:58,187 INFO L87 Difference]: Start difference. First operand 10939 states and 18164 transitions. Second operand has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 5 states have call successors, (24), 5 states have call predecessors, (24), 6 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 23:11:00,207 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:11:02,212 WARN L515 Checker$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 23:11:06,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:06,630 INFO L93 Difference]: Finished difference Result 39301 states and 66778 transitions. [2021-11-12 23:11:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:11:06,630 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 5 states have call successors, (24), 5 states have call predecessors, (24), 6 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 132 [2021-11-12 23:11:06,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:06,788 INFO L225 Difference]: With dead ends: 39301 [2021-11-12 23:11:06,788 INFO L226 Difference]: Without dead ends: 28463 [2021-11-12 23:11:06,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:11:06,841 INFO L933 BasicCegarLoop]: 1068 mSDtfsCounter, 2196 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 2587 mSolverCounterSat, 523 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6700.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2314 SdHoareTripleChecker+Valid, 2185 SdHoareTripleChecker+Invalid, 3112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.66ms SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 2587 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7166.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:06,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2314 Valid, 2185 Invalid, 3112 Unknown, 0 Unchecked, 15.66ms Time], IncrementalHoareTripleChecker [523 Valid, 2587 Invalid, 2 Unknown, 0 Unchecked, 7166.35ms Time] [2021-11-12 23:11:06,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28463 states. [2021-11-12 23:11:08,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28463 to 27698. [2021-11-12 23:11:08,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27698 states, 20567 states have (on average 1.6157922886176885) internal successors, (33232), 21934 states have internal predecessors, (33232), 5943 states have call successors, (5943), 1043 states have call predecessors, (5943), 1187 states have return successors, (7857), 5720 states have call predecessors, (7857), 5938 states have call successors, (7857) [2021-11-12 23:11:08,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27698 states to 27698 states and 47032 transitions. [2021-11-12 23:11:08,892 INFO L78 Accepts]: Start accepts. Automaton has 27698 states and 47032 transitions. Word has length 132 [2021-11-12 23:11:08,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:08,893 INFO L470 AbstractCegarLoop]: Abstraction has 27698 states and 47032 transitions. [2021-11-12 23:11:08,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 5 states have call successors, (24), 5 states have call predecessors, (24), 6 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 23:11:08,894 INFO L276 IsEmpty]: Start isEmpty. Operand 27698 states and 47032 transitions. [2021-11-12 23:11:08,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-12 23:11:08,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:08,898 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-12 23:11:08,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:09,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:09,112 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:09,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:09,112 INFO L85 PathProgramCache]: Analyzing trace with hash -2011044290, now seen corresponding path program 1 times [2021-11-12 23:11:09,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:09,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116210154] [2021-11-12 23:11:09,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:09,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:09,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:09,114 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:09,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:11:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:09,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:11:09,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:11:09,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:11:10,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:10,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116210154] [2021-11-12 23:11:10,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116210154] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:10,066 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:10,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-12 23:11:10,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782591437] [2021-11-12 23:11:10,066 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:10,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:11:10,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:10,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:11:10,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:11:10,067 INFO L87 Difference]: Start difference. First operand 27698 states and 47032 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-12 23:11:11,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:11,479 INFO L93 Difference]: Finished difference Result 28073 states and 47683 transitions. [2021-11-12 23:11:11,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:11:11,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 140 [2021-11-12 23:11:11,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:11,654 INFO L225 Difference]: With dead ends: 28073 [2021-11-12 23:11:11,654 INFO L226 Difference]: Without dead ends: 28058 [2021-11-12 23:11:11,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:11:11,673 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 77 mSDsluCounter, 2437 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 3271 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.75ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.94ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:11,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 3271 Invalid, 47 Unknown, 0 Unchecked, 2.75ms Time], IncrementalHoareTripleChecker [25 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 36.94ms Time] [2021-11-12 23:11:11,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28058 states. [2021-11-12 23:11:13,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28058 to 27752. [2021-11-12 23:11:13,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27752 states, 20621 states have (on average 1.6133553173948887) internal successors, (33269), 21988 states have internal predecessors, (33269), 5943 states have call successors, (5943), 1043 states have call predecessors, (5943), 1187 states have return successors, (7857), 5720 states have call predecessors, (7857), 5938 states have call successors, (7857) [2021-11-12 23:11:13,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27752 states to 27752 states and 47069 transitions. [2021-11-12 23:11:13,407 INFO L78 Accepts]: Start accepts. Automaton has 27752 states and 47069 transitions. Word has length 140 [2021-11-12 23:11:13,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:13,407 INFO L470 AbstractCegarLoop]: Abstraction has 27752 states and 47069 transitions. [2021-11-12 23:11:13,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-12 23:11:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 27752 states and 47069 transitions. [2021-11-12 23:11:13,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-12 23:11:13,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:13,416 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 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] [2021-11-12 23:11:13,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-12 23:11:13,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:13,632 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:13,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:13,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1328034440, now seen corresponding path program 1 times [2021-11-12 23:11:13,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:13,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424902892] [2021-11-12 23:11:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:13,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:13,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:13,634 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:13,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:11:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:14,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:11:14,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:11:14,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 23:11:15,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:15,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424902892] [2021-11-12 23:11:15,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424902892] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:11:15,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [491477503] [2021-11-12 23:11:15,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:15,221 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:11:15,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:11:15,222 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:11:15,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-12 23:11:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:15,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:11:15,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-12 23:11:15,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-12 23:11:16,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [491477503] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:16,670 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:11:16,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 8] total 18 [2021-11-12 23:11:16,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997722652] [2021-11-12 23:11:16,671 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:16,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:11:16,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:16,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:11:16,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:11:16,673 INFO L87 Difference]: Start difference. First operand 27752 states and 47069 transitions. Second operand has 5 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 5 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-12 23:11:18,704 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 23:11:24,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:24,625 INFO L93 Difference]: Finished difference Result 94467 states and 166140 transitions. [2021-11-12 23:11:24,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:11:24,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 5 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) Word has length 168 [2021-11-12 23:11:24,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:25,288 INFO L225 Difference]: With dead ends: 94467 [2021-11-12 23:11:25,288 INFO L226 Difference]: Without dead ends: 66803 [2021-11-12 23:11:25,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:11:25,397 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 2271 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 519 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3426.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2341 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.19ms SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3701.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:25,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2341 Valid, 1400 Invalid, 1318 Unknown, 0 Unchecked, 11.19ms Time], IncrementalHoareTripleChecker [519 Valid, 798 Invalid, 1 Unknown, 0 Unchecked, 3701.10ms Time] [2021-11-12 23:11:25,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66803 states. [2021-11-12 23:11:29,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66803 to 63071. [2021-11-12 23:11:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63071 states, 45603 states have (on average 1.6057715501173169) internal successors, (73228), 49004 states have internal predecessors, (73228), 14943 states have call successors, (14943), 2069 states have call predecessors, (14943), 2524 states have return successors, (23235), 14497 states have call predecessors, (23235), 14938 states have call successors, (23235) [2021-11-12 23:11:30,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63071 states to 63071 states and 111406 transitions. [2021-11-12 23:11:30,221 INFO L78 Accepts]: Start accepts. Automaton has 63071 states and 111406 transitions. Word has length 168 [2021-11-12 23:11:30,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:30,222 INFO L470 AbstractCegarLoop]: Abstraction has 63071 states and 111406 transitions. [2021-11-12 23:11:30,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 5 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-12 23:11:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 63071 states and 111406 transitions. [2021-11-12 23:11:30,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-12 23:11:30,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:30,232 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 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] [2021-11-12 23:11:30,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:30,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:30,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:30,636 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:30,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:30,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1780188764, now seen corresponding path program 1 times [2021-11-12 23:11:30,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:30,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540366759] [2021-11-12 23:11:30,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:30,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:30,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:30,638 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:30,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:11:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:31,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:11:31,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:11:31,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 23:11:32,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:32,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540366759] [2021-11-12 23:11:32,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540366759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:11:32,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1304965473] [2021-11-12 23:11:32,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:32,199 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:11:32,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:11:32,205 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:11:32,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc5849a-ca47-47b4-ba39-6d92e898545b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 23:11:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:32,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:11:32,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:11:32,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-12 23:11:33,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1304965473] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:33,232 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:11:33,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9, 8] total 16 [2021-11-12 23:11:33,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128801115] [2021-11-12 23:11:33,233 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:33,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:11:33,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:33,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:11:33,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:11:33,234 INFO L87 Difference]: Start difference. First operand 63071 states and 111406 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-12 23:11:41,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:41,825 INFO L93 Difference]: Finished difference Result 188197 states and 338540 transitions. [2021-11-12 23:11:41,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:11:41,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 169 [2021-11-12 23:11:41,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:42,873 INFO L225 Difference]: With dead ends: 188197 [2021-11-12 23:11:42,873 INFO L226 Difference]: Without dead ends: 125171 [2021-11-12 23:11:43,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 658 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:11:43,219 INFO L933 BasicCegarLoop]: 920 mSDtfsCounter, 728 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.24ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:43,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1657 Invalid, 10 Unknown, 0 Unchecked, 3.24ms Time], IncrementalHoareTripleChecker [5 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 41.47ms Time] [2021-11-12 23:11:43,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125171 states.