./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs --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 4f7f32f81229c7756ac3848f16abf37868e5b5283c2f5648c26317015a8240dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:28:50,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:28:50,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:28:50,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:28:50,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:28:51,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:28:51,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:28:51,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:28:51,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:28:51,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:28:51,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:28:51,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:28:51,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:28:51,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:28:51,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:28:51,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:28:51,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:28:51,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:28:51,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:28:51,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:28:51,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:28:51,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:28:51,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:28:51,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:28:51,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:28:51,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:28:51,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:28:51,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:28:51,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:28:51,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:28:51,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:28:51,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:28:51,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:28:51,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:28:51,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:28:51,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:28:51,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:28:51,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:28:51,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:28:51,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:28:51,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:28:51,102 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:28:51,154 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:28:51,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:28:51,156 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:28:51,156 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:28:51,157 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:28:51,157 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:28:51,157 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:28:51,158 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:28:51,158 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:28:51,158 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:28:51,159 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:28:51,160 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:28:51,160 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:28:51,161 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:28:51,161 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:28:51,161 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:28:51,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:28:51,163 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:28:51,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:28:51,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:28:51,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:28:51,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:28:51,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:28:51,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:28:51,165 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:28:51,165 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:28:51,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:28:51,165 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:28:51,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:28:51,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:28:51,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:28:51,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:28:51,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:28:51,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:28:51,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:28:51,170 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:28:51,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:28:51,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:28:51,171 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:28:51,171 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:28:51,172 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_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f7f32f81229c7756ac3848f16abf37868e5b5283c2f5648c26317015a8240dd [2021-11-19 13:28:51,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:28:51,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:28:51,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:28:51,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:28:51,557 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:28:51,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c [2021-11-19 13:28:51,641 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/data/c2f9f5b9f/91874a70c0a04fd8a035693e260328c4/FLAG09c402300 [2021-11-19 13:28:52,439 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:28:52,440 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c [2021-11-19 13:28:52,478 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/data/c2f9f5b9f/91874a70c0a04fd8a035693e260328c4/FLAG09c402300 [2021-11-19 13:28:52,553 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/data/c2f9f5b9f/91874a70c0a04fd8a035693e260328c4 [2021-11-19 13:28:52,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:28:52,560 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:28:52,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:28:52,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:28:52,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:28:52,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:28:52" (1/1) ... [2021-11-19 13:28:52,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5860736e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:28:52, skipping insertion in model container [2021-11-19 13:28:52,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:28:52" (1/1) ... [2021-11-19 13:28:52,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:28:52,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:28:53,505 WARN L230 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_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c[73003,73016] [2021-11-19 13:28:53,510 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:28:53,533 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) [2021-11-19 13:28:53,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@428cb420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:28:53, skipping insertion in model container [2021-11-19 13:28:53,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:28:53,535 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:28:53,538 INFO L158 Benchmark]: Toolchain (without parser) took 976.16ms. Allocated memory was 90.2MB in the beginning and 127.9MB in the end (delta: 37.7MB). Free memory was 51.2MB in the beginning and 89.9MB in the end (delta: -38.7MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2021-11-19 13:28:53,539 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 90.2MB. Free memory is still 70.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:28:53,542 INFO L158 Benchmark]: CACSL2BoogieTranslator took 969.78ms. Allocated memory was 90.2MB in the beginning and 127.9MB in the end (delta: 37.7MB). Free memory was 51.1MB in the beginning and 89.9MB in the end (delta: -38.9MB). Peak memory consumption was 4.3MB. Max. memory is 16.1GB. [2021-11-19 13:28:53,545 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 90.2MB. Free memory is still 70.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 969.78ms. Allocated memory was 90.2MB in the beginning and 127.9MB in the end (delta: 37.7MB). Free memory was 51.1MB in the beginning and 89.9MB in the end (delta: -38.9MB). Peak memory consumption was 4.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3106]: 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_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs --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 4f7f32f81229c7756ac3848f16abf37868e5b5283c2f5648c26317015a8240dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:28:56,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:28:56,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:28:56,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:28:56,419 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:28:56,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:28:56,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:28:56,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:28:56,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:28:56,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:28:56,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:28:56,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:28:56,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:28:56,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:28:56,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:28:56,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:28:56,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:28:56,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:28:56,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:28:56,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:28:56,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:28:56,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:28:56,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:28:56,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:28:56,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:28:56,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:28:56,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:28:56,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:28:56,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:28:56,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:28:56,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:28:56,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:28:56,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:28:56,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:28:56,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:28:56,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:28:56,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:28:56,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:28:56,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:28:56,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:28:56,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:28:56,528 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:28:56,564 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:28:56,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:28:56,566 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:28:56,567 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:28:56,567 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:28:56,567 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:28:56,568 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:28:56,568 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:28:56,569 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:28:56,569 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:28:56,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:28:56,572 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:28:56,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:28:56,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:28:56,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:28:56,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:28:56,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:28:56,574 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:28:56,574 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:28:56,575 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:28:56,575 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:28:56,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:28:56,576 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:28:56,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:28:56,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:28:56,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:28:56,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:28:56,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:28:56,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:28:56,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:28:56,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:28:56,579 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:28:56,579 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:28:56,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:28:56,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:28:56,580 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:28:56,581 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_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f7f32f81229c7756ac3848f16abf37868e5b5283c2f5648c26317015a8240dd [2021-11-19 13:28:57,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:28:57,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:28:57,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:28:57,115 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:28:57,116 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:28:57,118 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c [2021-11-19 13:28:57,201 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/data/8447a3da5/79dc5b3224874de68dff2de2a5ff92a8/FLAG84954b78b [2021-11-19 13:28:58,159 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:28:58,160 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c [2021-11-19 13:28:58,204 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/data/8447a3da5/79dc5b3224874de68dff2de2a5ff92a8/FLAG84954b78b [2021-11-19 13:28:58,249 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/data/8447a3da5/79dc5b3224874de68dff2de2a5ff92a8 [2021-11-19 13:28:58,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:28:58,254 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:28:58,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:28:58,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:28:58,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:28:58,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:28:58" (1/1) ... [2021-11-19 13:28:58,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d3aaf4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:28:58, skipping insertion in model container [2021-11-19 13:28:58,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:28:58" (1/1) ... [2021-11-19 13:28:58,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:28:58,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:28:59,097 WARN L230 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_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c[73003,73016] [2021-11-19 13:28:59,101 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:28:59,128 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:28:59,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:28:59,392 WARN L230 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_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c[73003,73016] [2021-11-19 13:28:59,393 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:28:59,403 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:28:59,608 WARN L230 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_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c[73003,73016] [2021-11-19 13:28:59,608 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:28:59,672 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:28:59,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:28:59 WrapperNode [2021-11-19 13:28:59,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:28:59,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:28:59,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:28:59,675 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:28:59,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:28:59" (1/1) ... [2021-11-19 13:28:59,732 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:28:59" (1/1) ... [2021-11-19 13:28:59,811 INFO L137 Inliner]: procedures = 95, calls = 348, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1068 [2021-11-19 13:28:59,812 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:28:59,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:28:59,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:28:59,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:28:59,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:28:59" (1/1) ... [2021-11-19 13:28:59,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:28:59" (1/1) ... [2021-11-19 13:28:59,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:28:59" (1/1) ... [2021-11-19 13:28:59,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:28:59" (1/1) ... [2021-11-19 13:28:59,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:28:59" (1/1) ... [2021-11-19 13:28:59,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:28:59" (1/1) ... [2021-11-19 13:28:59,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:28:59" (1/1) ... [2021-11-19 13:29:00,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:29:00,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:29:00,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:29:00,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:29:00,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:28:59" (1/1) ... [2021-11-19 13:29:00,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:29:00,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:29:00,060 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:29:00,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:29:00,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:29:00,114 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-19 13:29:00,115 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-19 13:29:00,115 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 13:29:00,115 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 13:29:00,115 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 13:29:00,116 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 13:29:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 13:29:00,116 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 13:29:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 13:29:00,117 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 13:29:00,117 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 13:29:00,117 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 13:29:00,117 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 13:29:00,118 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 13:29:00,118 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 13:29:00,118 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 13:29:00,118 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 13:29:00,119 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 13:29:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 13:29:00,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 13:29:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 13:29:00,120 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 13:29:00,120 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 13:29:00,120 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 13:29:00,120 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 13:29:00,121 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 13:29:00,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:29:00,121 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 13:29:00,121 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 13:29:00,121 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-19 13:29:00,122 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-19 13:29:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 13:29:00,122 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 13:29:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 13:29:00,123 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 13:29:00,123 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 13:29:00,123 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 13:29:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-19 13:29:00,124 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-19 13:29:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 13:29:00,124 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 13:29:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 13:29:00,125 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 13:29:00,125 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 13:29:00,125 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 13:29:00,125 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 13:29:00,126 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 13:29:00,126 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 13:29:00,126 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 13:29:00,126 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 13:29:00,127 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 13:29:00,127 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 13:29:00,127 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 13:29:00,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:29:00,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:29:00,128 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 13:29:00,128 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 13:29:00,354 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:29:00,357 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:29:01,802 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:29:01,836 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:29:01,841 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:29:01,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:29:01 BoogieIcfgContainer [2021-11-19 13:29:01,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:29:01,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:29:01,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:29:01,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:29:01,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:28:58" (1/3) ... [2021-11-19 13:29:01,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22857f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:29:01, skipping insertion in model container [2021-11-19 13:29:01,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:28:59" (2/3) ... [2021-11-19 13:29:01,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22857f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:29:01, skipping insertion in model container [2021-11-19 13:29:01,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:29:01" (3/3) ... [2021-11-19 13:29:01,864 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product27.cil.c [2021-11-19 13:29:01,872 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:29:01,873 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:29:01,955 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:29:01,963 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 [2021-11-19 13:29:01,963 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:29:02,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 598 states, 461 states have (on average 1.6702819956616053) internal successors, (770), 479 states have internal predecessors, (770), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-19 13:29:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 13:29:02,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:02,076 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:02,077 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:02,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:02,084 INFO L85 PathProgramCache]: Analyzing trace with hash -363175274, now seen corresponding path program 1 times [2021-11-19 13:29:02,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:02,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139724490] [2021-11-19 13:29:02,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:02,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:02,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:02,126 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:02,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:29:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:02,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:29:02,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:29:03,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:29:03,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:03,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139724490] [2021-11-19 13:29:03,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139724490] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:03,919 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:03,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:29:03,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954740199] [2021-11-19 13:29:03,924 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:03,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:29:03,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:03,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:29:03,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:29:03,971 INFO L87 Difference]: Start difference. First operand has 598 states, 461 states have (on average 1.6702819956616053) internal successors, (770), 479 states have internal predecessors, (770), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 13:29:04,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:04,507 INFO L93 Difference]: Finished difference Result 1199 states and 1993 transitions. [2021-11-19 13:29:04,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:29:04,512 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 113 [2021-11-19 13:29:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:04,558 INFO L225 Difference]: With dead ends: 1199 [2021-11-19 13:29:04,558 INFO L226 Difference]: Without dead ends: 609 [2021-11-19 13:29:04,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:29:04,589 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 118 mSDsluCounter, 6607 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 7575 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:04,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 7575 Invalid, 111 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:29:04,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-11-19 13:29:04,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 601. [2021-11-19 13:29:04,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 464 states have (on average 1.6616379310344827) internal successors, (771), 482 states have internal predecessors, (771), 109 states have call successors, (109), 27 states have call predecessors, (109), 27 states have return successors, (108), 104 states have call predecessors, (108), 106 states have call successors, (108) [2021-11-19 13:29:04,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 988 transitions. [2021-11-19 13:29:04,770 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 988 transitions. Word has length 113 [2021-11-19 13:29:04,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:04,772 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 988 transitions. [2021-11-19 13:29:04,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 13:29:04,773 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 988 transitions. [2021-11-19 13:29:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 13:29:04,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:04,795 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:04,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:05,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:05,010 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:05,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:05,011 INFO L85 PathProgramCache]: Analyzing trace with hash 356217210, now seen corresponding path program 1 times [2021-11-19 13:29:05,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:05,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229736326] [2021-11-19 13:29:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:05,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:05,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:05,014 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:05,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:29:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:05,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:29:05,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:29:05,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:29:06,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:06,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229736326] [2021-11-19 13:29:06,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229736326] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:06,414 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:06,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:29:06,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189992010] [2021-11-19 13:29:06,415 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:06,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:29:06,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:06,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:29:06,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:29:06,420 INFO L87 Difference]: Start difference. First operand 601 states and 988 transitions. Second operand has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 13:29:06,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:06,725 INFO L93 Difference]: Finished difference Result 1207 states and 1994 transitions. [2021-11-19 13:29:06,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:29:06,726 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 114 [2021-11-19 13:29:06,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:06,734 INFO L225 Difference]: With dead ends: 1207 [2021-11-19 13:29:06,735 INFO L226 Difference]: Without dead ends: 622 [2021-11-19 13:29:06,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:29:06,742 INFO L933 BasicCegarLoop]: 969 mSDtfsCounter, 186 mSDsluCounter, 4811 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 5780 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:06,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 5780 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:29:06,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-11-19 13:29:06,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 614. [2021-11-19 13:29:06,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 474 states have (on average 1.6582278481012658) internal successors, (786), 494 states have internal predecessors, (786), 110 states have call successors, (110), 27 states have call predecessors, (110), 29 states have return successors, (111), 105 states have call predecessors, (111), 107 states have call successors, (111) [2021-11-19 13:29:06,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1007 transitions. [2021-11-19 13:29:06,804 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1007 transitions. Word has length 114 [2021-11-19 13:29:06,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:06,805 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1007 transitions. [2021-11-19 13:29:06,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 13:29:06,806 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1007 transitions. [2021-11-19 13:29:06,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 13:29:06,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:06,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:06,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:07,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:07,027 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:07,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:07,027 INFO L85 PathProgramCache]: Analyzing trace with hash -780489670, now seen corresponding path program 1 times [2021-11-19 13:29:07,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:07,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020023073] [2021-11-19 13:29:07,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:07,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:07,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:07,030 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:07,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:29:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:07,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:29:07,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:29:07,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:29:08,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:08,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020023073] [2021-11-19 13:29:08,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020023073] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:08,453 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:08,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:29:08,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981696898] [2021-11-19 13:29:08,454 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:08,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:29:08,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:08,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:29:08,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:29:08,456 INFO L87 Difference]: Start difference. First operand 614 states and 1007 transitions. Second operand has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 13:29:08,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:08,825 INFO L93 Difference]: Finished difference Result 1233 states and 2033 transitions. [2021-11-19 13:29:08,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:29:08,826 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 115 [2021-11-19 13:29:08,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:08,836 INFO L225 Difference]: With dead ends: 1233 [2021-11-19 13:29:08,836 INFO L226 Difference]: Without dead ends: 635 [2021-11-19 13:29:08,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:29:08,847 INFO L933 BasicCegarLoop]: 969 mSDtfsCounter, 103 mSDsluCounter, 7545 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 8514 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:08,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 8514 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:29:08,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-19 13:29:08,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 627. [2021-11-19 13:29:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 484 states have (on average 1.6549586776859504) internal successors, (801), 506 states have internal predecessors, (801), 111 states have call successors, (111), 27 states have call predecessors, (111), 31 states have return successors, (114), 106 states have call predecessors, (114), 108 states have call successors, (114) [2021-11-19 13:29:08,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1026 transitions. [2021-11-19 13:29:08,900 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1026 transitions. Word has length 115 [2021-11-19 13:29:08,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:08,900 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 1026 transitions. [2021-11-19 13:29:08,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 13:29:08,901 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1026 transitions. [2021-11-19 13:29:08,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 13:29:08,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:08,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:08,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:09,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:09,125 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:09,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:09,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1420925983, now seen corresponding path program 1 times [2021-11-19 13:29:09,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:09,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31419134] [2021-11-19 13:29:09,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:09,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:09,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:09,130 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:09,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:29:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:09,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:29:09,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:29:09,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:29:10,420 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:10,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31419134] [2021-11-19 13:29:10,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31419134] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:10,421 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:10,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 13:29:10,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947057172] [2021-11-19 13:29:10,421 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:10,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:29:10,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:10,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:29:10,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:29:10,423 INFO L87 Difference]: Start difference. First operand 627 states and 1026 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 13:29:10,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:10,616 INFO L93 Difference]: Finished difference Result 1253 states and 2063 transitions. [2021-11-19 13:29:10,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:29:10,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 116 [2021-11-19 13:29:10,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:10,624 INFO L225 Difference]: With dead ends: 1253 [2021-11-19 13:29:10,625 INFO L226 Difference]: Without dead ends: 642 [2021-11-19 13:29:10,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:29:10,632 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 150 mSDsluCounter, 4653 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 5610 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:10,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 5610 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-19 13:29:10,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 640. [2021-11-19 13:29:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 494 states have (on average 1.6518218623481782) internal successors, (816), 518 states have internal predecessors, (816), 112 states have call successors, (112), 27 states have call predecessors, (112), 33 states have return successors, (120), 107 states have call predecessors, (120), 109 states have call successors, (120) [2021-11-19 13:29:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1048 transitions. [2021-11-19 13:29:10,680 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1048 transitions. Word has length 116 [2021-11-19 13:29:10,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:10,680 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1048 transitions. [2021-11-19 13:29:10,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 13:29:10,681 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1048 transitions. [2021-11-19 13:29:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 13:29:10,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:10,687 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:10,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:10,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:10,902 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:10,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:10,903 INFO L85 PathProgramCache]: Analyzing trace with hash 826959326, now seen corresponding path program 1 times [2021-11-19 13:29:10,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:10,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048498218] [2021-11-19 13:29:10,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:10,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:10,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:10,907 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:10,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:29:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:11,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:29:11,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:29:11,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:29:12,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:12,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048498218] [2021-11-19 13:29:12,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048498218] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:12,213 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:12,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:29:12,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464640651] [2021-11-19 13:29:12,213 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:12,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:29:12,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:12,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:29:12,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:29:12,216 INFO L87 Difference]: Start difference. First operand 640 states and 1048 transitions. Second operand has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 13:29:12,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:12,574 INFO L93 Difference]: Finished difference Result 1276 states and 2099 transitions. [2021-11-19 13:29:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 13:29:12,575 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 117 [2021-11-19 13:29:12,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:12,581 INFO L225 Difference]: With dead ends: 1276 [2021-11-19 13:29:12,581 INFO L226 Difference]: Without dead ends: 646 [2021-11-19 13:29:12,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:29:12,587 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 123 mSDsluCounter, 7423 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 8370 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:12,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 8370 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:29:12,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-19 13:29:12,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 636. [2021-11-19 13:29:12,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 490 states have (on average 1.6428571428571428) internal successors, (805), 514 states have internal predecessors, (805), 112 states have call successors, (112), 27 states have call predecessors, (112), 33 states have return successors, (120), 107 states have call predecessors, (120), 109 states have call successors, (120) [2021-11-19 13:29:12,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1037 transitions. [2021-11-19 13:29:12,626 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1037 transitions. Word has length 117 [2021-11-19 13:29:12,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:12,627 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1037 transitions. [2021-11-19 13:29:12,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 13:29:12,627 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1037 transitions. [2021-11-19 13:29:12,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 13:29:12,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:12,633 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:12,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:12,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:12,850 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:12,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:12,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1827055730, now seen corresponding path program 1 times [2021-11-19 13:29:12,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:12,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659596087] [2021-11-19 13:29:12,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:12,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:12,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:12,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:12,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:29:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:13,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:29:13,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:29:13,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:29:13,918 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:13,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659596087] [2021-11-19 13:29:13,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659596087] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:13,919 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:13,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 13:29:13,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447664922] [2021-11-19 13:29:13,919 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:13,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:29:13,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:13,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:29:13,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:29:13,922 INFO L87 Difference]: Start difference. First operand 636 states and 1037 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 13:29:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:14,008 INFO L93 Difference]: Finished difference Result 1248 states and 2040 transitions. [2021-11-19 13:29:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:29:14,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 117 [2021-11-19 13:29:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:14,019 INFO L225 Difference]: With dead ends: 1248 [2021-11-19 13:29:14,019 INFO L226 Difference]: Without dead ends: 559 [2021-11-19 13:29:14,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:29:14,030 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 19 mSDsluCounter, 2860 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3817 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:14,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 3817 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:29:14,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-19 13:29:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-19 13:29:14,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 425 states have (on average 1.6258823529411766) internal successors, (691), 441 states have internal predecessors, (691), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-19 13:29:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 904 transitions. [2021-11-19 13:29:14,070 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 904 transitions. Word has length 117 [2021-11-19 13:29:14,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:14,072 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 904 transitions. [2021-11-19 13:29:14,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 13:29:14,073 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 904 transitions. [2021-11-19 13:29:14,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 13:29:14,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:14,077 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:14,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:14,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:14,296 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:14,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1513054078, now seen corresponding path program 1 times [2021-11-19 13:29:14,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:14,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802778825] [2021-11-19 13:29:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:14,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:14,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:14,298 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:14,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:29:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:14,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:29:14,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:29:14,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:29:15,503 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:15,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802778825] [2021-11-19 13:29:15,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802778825] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:15,503 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:15,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:29:15,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981492147] [2021-11-19 13:29:15,503 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:15,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:29:15,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:15,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:29:15,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:29:15,505 INFO L87 Difference]: Start difference. First operand 559 states and 904 transitions. Second operand has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 13:29:15,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:15,697 INFO L93 Difference]: Finished difference Result 1105 states and 1796 transitions. [2021-11-19 13:29:15,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:29:15,699 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 118 [2021-11-19 13:29:15,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:15,709 INFO L225 Difference]: With dead ends: 1105 [2021-11-19 13:29:15,710 INFO L226 Difference]: Without dead ends: 559 [2021-11-19 13:29:15,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:29:15,717 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 76 mSDsluCounter, 5297 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 6184 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:15,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 6184 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:15,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-19 13:29:15,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-19 13:29:15,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 425 states have (on average 1.6235294117647059) internal successors, (690), 441 states have internal predecessors, (690), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-19 13:29:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 903 transitions. [2021-11-19 13:29:15,747 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 903 transitions. Word has length 118 [2021-11-19 13:29:15,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:15,747 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 903 transitions. [2021-11-19 13:29:15,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 13:29:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 903 transitions. [2021-11-19 13:29:15,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 13:29:15,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:15,753 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:15,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:15,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:15,975 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:15,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:15,976 INFO L85 PathProgramCache]: Analyzing trace with hash -444088989, now seen corresponding path program 1 times [2021-11-19 13:29:15,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:15,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264117023] [2021-11-19 13:29:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:15,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:15,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:15,978 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:15,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:29:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:16,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:29:16,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:29:16,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:29:17,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:17,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264117023] [2021-11-19 13:29:17,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264117023] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:17,205 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:17,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:29:17,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204942967] [2021-11-19 13:29:17,206 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:17,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:29:17,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:17,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:29:17,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:29:17,208 INFO L87 Difference]: Start difference. First operand 559 states and 903 transitions. Second operand has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 13:29:17,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:17,434 INFO L93 Difference]: Finished difference Result 1105 states and 1794 transitions. [2021-11-19 13:29:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:29:17,436 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 119 [2021-11-19 13:29:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:17,442 INFO L225 Difference]: With dead ends: 1105 [2021-11-19 13:29:17,443 INFO L226 Difference]: Without dead ends: 559 [2021-11-19 13:29:17,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:29:17,449 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 35 mSDsluCounter, 9705 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 10592 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:17,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 10592 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:17,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-19 13:29:17,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-19 13:29:17,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 425 states have (on average 1.6211764705882352) internal successors, (689), 441 states have internal predecessors, (689), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-19 13:29:17,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 902 transitions. [2021-11-19 13:29:17,479 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 902 transitions. Word has length 119 [2021-11-19 13:29:17,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:17,480 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 902 transitions. [2021-11-19 13:29:17,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 13:29:17,480 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 902 transitions. [2021-11-19 13:29:17,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 13:29:17,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:17,485 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:17,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:17,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:17,700 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:17,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:17,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1557741475, now seen corresponding path program 1 times [2021-11-19 13:29:17,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:17,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398700713] [2021-11-19 13:29:17,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:17,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:17,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:17,703 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:17,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:29:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:18,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:29:18,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:29:18,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:29:18,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:18,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398700713] [2021-11-19 13:29:18,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398700713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:18,896 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:18,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:29:18,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312853047] [2021-11-19 13:29:18,896 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:18,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:29:18,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:18,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:29:18,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:29:18,899 INFO L87 Difference]: Start difference. First operand 559 states and 902 transitions. Second operand has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 13:29:19,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:19,043 INFO L93 Difference]: Finished difference Result 1105 states and 1792 transitions. [2021-11-19 13:29:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:29:19,045 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 120 [2021-11-19 13:29:19,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:19,051 INFO L225 Difference]: With dead ends: 1105 [2021-11-19 13:29:19,051 INFO L226 Difference]: Without dead ends: 559 [2021-11-19 13:29:19,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:29:19,057 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 41 mSDsluCounter, 6169 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 7056 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:19,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 7056 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:19,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-19 13:29:19,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-19 13:29:19,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 425 states have (on average 1.6188235294117648) internal successors, (688), 441 states have internal predecessors, (688), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-19 13:29:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 901 transitions. [2021-11-19 13:29:19,088 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 901 transitions. Word has length 120 [2021-11-19 13:29:19,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:19,088 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 901 transitions. [2021-11-19 13:29:19,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 13:29:19,089 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 901 transitions. [2021-11-19 13:29:19,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 13:29:19,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:19,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:19,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:19,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:19,312 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:19,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:19,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1733699816, now seen corresponding path program 1 times [2021-11-19 13:29:19,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:19,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767160769] [2021-11-19 13:29:19,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:19,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:19,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:19,315 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:19,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:29:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:19,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:29:19,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:29:20,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:29:20,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:20,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767160769] [2021-11-19 13:29:20,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767160769] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:20,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:20,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-19 13:29:20,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359608414] [2021-11-19 13:29:20,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:20,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:29:20,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:20,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:29:20,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:29:20,439 INFO L87 Difference]: Start difference. First operand 559 states and 901 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 13:29:21,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:21,600 INFO L93 Difference]: Finished difference Result 1599 states and 2600 transitions. [2021-11-19 13:29:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:29:21,604 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 121 [2021-11-19 13:29:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:21,613 INFO L225 Difference]: With dead ends: 1599 [2021-11-19 13:29:21,614 INFO L226 Difference]: Without dead ends: 1058 [2021-11-19 13:29:21,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:29:21,621 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 774 mSDsluCounter, 3548 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 4508 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:21,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 4508 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 13:29:21,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-11-19 13:29:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1049. [2021-11-19 13:29:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 800 states have (on average 1.5825) internal successors, (1266), 830 states have internal predecessors, (1266), 200 states have call successors, (200), 51 states have call predecessors, (200), 48 states have return successors, (201), 192 states have call predecessors, (201), 196 states have call successors, (201) [2021-11-19 13:29:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1667 transitions. [2021-11-19 13:29:21,688 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1667 transitions. Word has length 121 [2021-11-19 13:29:21,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:21,690 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 1667 transitions. [2021-11-19 13:29:21,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 13:29:21,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1667 transitions. [2021-11-19 13:29:21,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 13:29:21,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:21,695 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:21,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:21,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:21,916 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:21,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:21,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1932394138, now seen corresponding path program 1 times [2021-11-19 13:29:21,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:21,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307783562] [2021-11-19 13:29:21,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:21,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:21,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:21,918 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:21,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:29:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:22,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:29:22,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:29:22,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:29:22,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:22,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307783562] [2021-11-19 13:29:22,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307783562] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:22,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:22,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-19 13:29:22,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860052705] [2021-11-19 13:29:22,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:22,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:29:22,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:22,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:29:22,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:29:22,989 INFO L87 Difference]: Start difference. First operand 1049 states and 1667 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 13:29:23,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:23,946 INFO L93 Difference]: Finished difference Result 2634 states and 4251 transitions. [2021-11-19 13:29:23,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:29:23,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 123 [2021-11-19 13:29:23,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:23,962 INFO L225 Difference]: With dead ends: 2634 [2021-11-19 13:29:23,962 INFO L226 Difference]: Without dead ends: 1603 [2021-11-19 13:29:23,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:29:23,971 INFO L933 BasicCegarLoop]: 1112 mSDtfsCounter, 883 mSDsluCounter, 3733 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 4845 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:23,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 4845 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:29:23,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2021-11-19 13:29:24,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1594. [2021-11-19 13:29:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1216 states have (on average 1.596217105263158) internal successors, (1941), 1261 states have internal predecessors, (1941), 302 states have call successors, (302), 75 states have call predecessors, (302), 75 states have return successors, (324), 295 states have call predecessors, (324), 297 states have call successors, (324) [2021-11-19 13:29:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2567 transitions. [2021-11-19 13:29:24,057 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2567 transitions. Word has length 123 [2021-11-19 13:29:24,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:24,057 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2567 transitions. [2021-11-19 13:29:24,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 13:29:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2567 transitions. [2021-11-19 13:29:24,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 13:29:24,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:24,062 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:24,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:24,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:24,279 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:24,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:24,280 INFO L85 PathProgramCache]: Analyzing trace with hash -951451077, now seen corresponding path program 1 times [2021-11-19 13:29:24,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:24,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1399670844] [2021-11-19 13:29:24,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:24,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:24,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:24,281 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:24,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:29:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:24,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:29:24,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:29:24,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:29:25,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:25,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1399670844] [2021-11-19 13:29:25,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1399670844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:25,311 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:25,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 13:29:25,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089324609] [2021-11-19 13:29:25,311 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:25,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:29:25,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:25,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:29:25,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:29:25,313 INFO L87 Difference]: Start difference. First operand 1594 states and 2567 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-19 13:29:27,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:27,693 INFO L93 Difference]: Finished difference Result 5661 states and 9575 transitions. [2021-11-19 13:29:27,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:29:27,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 126 [2021-11-19 13:29:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:27,744 INFO L225 Difference]: With dead ends: 5661 [2021-11-19 13:29:27,744 INFO L226 Difference]: Without dead ends: 4085 [2021-11-19 13:29:27,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:29:27,761 INFO L933 BasicCegarLoop]: 1363 mSDtfsCounter, 1192 mSDsluCounter, 5356 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 6719 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:27,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1279 Valid, 6719 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 13:29:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-11-19 13:29:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 3134. [2021-11-19 13:29:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3134 states, 2395 states have (on average 1.5920668058455114) internal successors, (3813), 2486 states have internal predecessors, (3813), 584 states have call successors, (584), 147 states have call predecessors, (584), 154 states have return successors, (745), 576 states have call predecessors, (745), 576 states have call successors, (745) [2021-11-19 13:29:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3134 states to 3134 states and 5142 transitions. [2021-11-19 13:29:28,004 INFO L78 Accepts]: Start accepts. Automaton has 3134 states and 5142 transitions. Word has length 126 [2021-11-19 13:29:28,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:28,005 INFO L470 AbstractCegarLoop]: Abstraction has 3134 states and 5142 transitions. [2021-11-19 13:29:28,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-19 13:29:28,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3134 states and 5142 transitions. [2021-11-19 13:29:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 13:29:28,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:28,010 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:28,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:28,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:28,229 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:28,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:28,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2084536366, now seen corresponding path program 1 times [2021-11-19 13:29:28,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:28,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27349606] [2021-11-19 13:29:28,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:28,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:28,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:28,232 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:28,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:29:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:28,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:29:28,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:29:28,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:29,114 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:29:29,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:29,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27349606] [2021-11-19 13:29:29,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27349606] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:29,115 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:29,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 13:29:29,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123375673] [2021-11-19 13:29:29,116 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:29,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:29:29,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:29,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:29:29,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:29:29,117 INFO L87 Difference]: Start difference. First operand 3134 states and 5142 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 13:29:29,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:29,363 INFO L93 Difference]: Finished difference Result 6268 states and 10412 transitions. [2021-11-19 13:29:29,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:29:29,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 127 [2021-11-19 13:29:29,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:29,397 INFO L225 Difference]: With dead ends: 6268 [2021-11-19 13:29:29,397 INFO L226 Difference]: Without dead ends: 3152 [2021-11-19 13:29:29,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:29:29,430 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 19 mSDsluCounter, 1735 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2616 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:29,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 2616 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:29,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2021-11-19 13:29:29,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 3146. [2021-11-19 13:29:29,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3146 states, 2404 states have (on average 1.588602329450915) internal successors, (3819), 2495 states have internal predecessors, (3819), 584 states have call successors, (584), 153 states have call predecessors, (584), 157 states have return successors, (729), 573 states have call predecessors, (729), 576 states have call successors, (729) [2021-11-19 13:29:29,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3146 states to 3146 states and 5132 transitions. [2021-11-19 13:29:29,700 INFO L78 Accepts]: Start accepts. Automaton has 3146 states and 5132 transitions. Word has length 127 [2021-11-19 13:29:29,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:29,701 INFO L470 AbstractCegarLoop]: Abstraction has 3146 states and 5132 transitions. [2021-11-19 13:29:29,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 13:29:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 3146 states and 5132 transitions. [2021-11-19 13:29:29,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 13:29:29,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:29,706 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:29,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:29,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:29,926 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:29,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:29,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1512441396, now seen corresponding path program 1 times [2021-11-19 13:29:29,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:29,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176842740] [2021-11-19 13:29:29,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:29,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:29,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:29,928 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:29,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:29:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:30,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:29:30,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 13:29:30,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:29:30,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:30,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176842740] [2021-11-19 13:29:30,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176842740] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:30,949 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:30,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 13:29:30,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513982129] [2021-11-19 13:29:30,949 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:30,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:29:30,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:30,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:29:30,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:29:30,951 INFO L87 Difference]: Start difference. First operand 3146 states and 5132 transitions. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-19 13:29:33,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:33,136 INFO L93 Difference]: Finished difference Result 11246 states and 19519 transitions. [2021-11-19 13:29:33,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:29:33,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) Word has length 135 [2021-11-19 13:29:33,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:33,219 INFO L225 Difference]: With dead ends: 11246 [2021-11-19 13:29:33,220 INFO L226 Difference]: Without dead ends: 8118 [2021-11-19 13:29:33,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:29:33,244 INFO L933 BasicCegarLoop]: 1347 mSDtfsCounter, 1166 mSDsluCounter, 5324 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 6671 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:33,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1242 Valid, 6671 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 13:29:33,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8118 states. [2021-11-19 13:29:33,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8118 to 6268. [2021-11-19 13:29:33,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6268 states, 4792 states have (on average 1.5840984974958263) internal successors, (7591), 4978 states have internal predecessors, (7591), 1151 states have call successors, (1151), 303 states have call predecessors, (1151), 324 states have return successors, (1708), 1138 states have call predecessors, (1708), 1137 states have call successors, (1708) [2021-11-19 13:29:33,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6268 states to 6268 states and 10450 transitions. [2021-11-19 13:29:33,723 INFO L78 Accepts]: Start accepts. Automaton has 6268 states and 10450 transitions. Word has length 135 [2021-11-19 13:29:33,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:33,724 INFO L470 AbstractCegarLoop]: Abstraction has 6268 states and 10450 transitions. [2021-11-19 13:29:33,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-19 13:29:33,724 INFO L276 IsEmpty]: Start isEmpty. Operand 6268 states and 10450 transitions. [2021-11-19 13:29:33,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 13:29:33,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:33,728 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:33,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:33,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:33,949 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:33,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:33,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1095371607, now seen corresponding path program 1 times [2021-11-19 13:29:33,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:33,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218417248] [2021-11-19 13:29:33,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:33,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:33,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:33,952 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:33,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:29:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:34,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:29:34,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:29:34,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:29:34,833 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:34,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218417248] [2021-11-19 13:29:34,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218417248] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:34,834 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:34,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 13:29:34,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15643137] [2021-11-19 13:29:34,834 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:34,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:29:34,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:34,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:29:34,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:29:34,835 INFO L87 Difference]: Start difference. First operand 6268 states and 10450 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-19 13:29:35,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:35,287 INFO L93 Difference]: Finished difference Result 12590 states and 21327 transitions. [2021-11-19 13:29:35,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:29:35,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 136 [2021-11-19 13:29:35,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:35,339 INFO L225 Difference]: With dead ends: 12590 [2021-11-19 13:29:35,340 INFO L226 Difference]: Without dead ends: 6340 [2021-11-19 13:29:35,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:29:35,384 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 21 mSDsluCounter, 2602 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3481 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:35,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3481 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:35,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6340 states. [2021-11-19 13:29:35,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6340 to 6328. [2021-11-19 13:29:35,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 4846 states have (on average 1.5788278992983904) internal successors, (7651), 5020 states have internal predecessors, (7651), 1151 states have call successors, (1151), 327 states have call predecessors, (1151), 330 states have return successors, (1684), 1132 states have call predecessors, (1684), 1137 states have call successors, (1684) [2021-11-19 13:29:35,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 10486 transitions. [2021-11-19 13:29:35,772 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 10486 transitions. Word has length 136 [2021-11-19 13:29:35,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:35,773 INFO L470 AbstractCegarLoop]: Abstraction has 6328 states and 10486 transitions. [2021-11-19 13:29:35,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-19 13:29:35,774 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 10486 transitions. [2021-11-19 13:29:35,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 13:29:35,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:35,778 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:35,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:36,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:36,000 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:36,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:36,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1315301520, now seen corresponding path program 1 times [2021-11-19 13:29:36,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:36,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91577434] [2021-11-19 13:29:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:36,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:36,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:36,002 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:36,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:29:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:36,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:29:36,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:29:36,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 13:29:36,958 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:36,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91577434] [2021-11-19 13:29:36,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91577434] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:36,959 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:36,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 13:29:36,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331783706] [2021-11-19 13:29:36,959 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:36,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:29:36,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:36,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:29:36,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:29:36,961 INFO L87 Difference]: Start difference. First operand 6328 states and 10486 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-19 13:29:39,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:39,330 INFO L93 Difference]: Finished difference Result 22606 states and 40746 transitions. [2021-11-19 13:29:39,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:29:39,332 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) Word has length 145 [2021-11-19 13:29:39,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:39,454 INFO L225 Difference]: With dead ends: 22606 [2021-11-19 13:29:39,454 INFO L226 Difference]: Without dead ends: 16296 [2021-11-19 13:29:39,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:29:39,511 INFO L933 BasicCegarLoop]: 1344 mSDtfsCounter, 1143 mSDsluCounter, 5524 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 6868 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:39,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1215 Valid, 6868 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 13:29:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16296 states. [2021-11-19 13:29:40,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16296 to 12680. [2021-11-19 13:29:40,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12680 states, 9709 states have (on average 1.5742094963435986) internal successors, (15284), 10067 states have internal predecessors, (15284), 2288 states have call successors, (2288), 651 states have call predecessors, (2288), 682 states have return successors, (4073), 2265 states have call predecessors, (4073), 2262 states have call successors, (4073) [2021-11-19 13:29:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12680 states to 12680 states and 21645 transitions. [2021-11-19 13:29:40,648 INFO L78 Accepts]: Start accepts. Automaton has 12680 states and 21645 transitions. Word has length 145 [2021-11-19 13:29:40,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:40,649 INFO L470 AbstractCegarLoop]: Abstraction has 12680 states and 21645 transitions. [2021-11-19 13:29:40,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-19 13:29:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 12680 states and 21645 transitions. [2021-11-19 13:29:40,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 13:29:40,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:40,654 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:40,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:40,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:40,870 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:40,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:40,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1920992717, now seen corresponding path program 1 times [2021-11-19 13:29:40,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:40,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32271773] [2021-11-19 13:29:40,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:40,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:40,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:40,873 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:40,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:29:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:41,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:29:41,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:29:41,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 13:29:41,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:41,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32271773] [2021-11-19 13:29:41,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32271773] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:41,777 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:41,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 13:29:41,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415146755] [2021-11-19 13:29:41,778 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:41,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:29:41,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:41,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:29:41,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:29:41,780 INFO L87 Difference]: Start difference. First operand 12680 states and 21645 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-19 13:29:42,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:42,809 INFO L93 Difference]: Finished difference Result 25486 states and 44575 transitions. [2021-11-19 13:29:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:29:42,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 146 [2021-11-19 13:29:42,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:42,886 INFO L225 Difference]: With dead ends: 25486 [2021-11-19 13:29:42,886 INFO L226 Difference]: Without dead ends: 12824 [2021-11-19 13:29:42,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:29:43,001 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 27 mSDsluCounter, 1735 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2614 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:43,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 2614 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:43,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12824 states. [2021-11-19 13:29:43,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12824 to 12800. [2021-11-19 13:29:43,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12800 states, 9817 states have (on average 1.5691148008556586) internal successors, (15404), 10175 states have internal predecessors, (15404), 2288 states have call successors, (2288), 675 states have call predecessors, (2288), 694 states have return successors, (4041), 2253 states have call predecessors, (4041), 2262 states have call successors, (4041) [2021-11-19 13:29:43,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12800 states to 12800 states and 21733 transitions. [2021-11-19 13:29:43,896 INFO L78 Accepts]: Start accepts. Automaton has 12800 states and 21733 transitions. Word has length 146 [2021-11-19 13:29:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:43,897 INFO L470 AbstractCegarLoop]: Abstraction has 12800 states and 21733 transitions. [2021-11-19 13:29:43,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-19 13:29:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 12800 states and 21733 transitions. [2021-11-19 13:29:43,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 13:29:43,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:43,901 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:43,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:44,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:44,119 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:44,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:44,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1512843063, now seen corresponding path program 1 times [2021-11-19 13:29:44,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:44,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673534369] [2021-11-19 13:29:44,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:44,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:44,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:44,123 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:44,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:29:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:44,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:29:44,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 13:29:44,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 13:29:45,129 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:45,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673534369] [2021-11-19 13:29:45,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673534369] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:45,129 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:45,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 13:29:45,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274471157] [2021-11-19 13:29:45,132 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:45,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:29:45,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:45,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:29:45,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:29:45,134 INFO L87 Difference]: Start difference. First operand 12800 states and 21733 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-19 13:29:48,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:48,752 INFO L93 Difference]: Finished difference Result 45574 states and 87288 transitions. [2021-11-19 13:29:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:29:48,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) Word has length 156 [2021-11-19 13:29:48,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:49,024 INFO L225 Difference]: With dead ends: 45574 [2021-11-19 13:29:49,024 INFO L226 Difference]: Without dead ends: 32792 [2021-11-19 13:29:49,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:29:49,174 INFO L933 BasicCegarLoop]: 1179 mSDtfsCounter, 1203 mSDsluCounter, 4828 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 6007 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:49,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1271 Valid, 6007 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 13:29:49,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32792 states. [2021-11-19 13:29:51,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32792 to 25708. [2021-11-19 13:29:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25708 states, 19708 states have (on average 1.5644915770245587) internal successors, (30833), 20446 states have internal predecessors, (30833), 4565 states have call successors, (4565), 1347 states have call predecessors, (4565), 1434 states have return successors, (10278), 4522 states have call predecessors, (10278), 4515 states have call successors, (10278) [2021-11-19 13:29:51,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25708 states to 25708 states and 45676 transitions. [2021-11-19 13:29:51,583 INFO L78 Accepts]: Start accepts. Automaton has 25708 states and 45676 transitions. Word has length 156 [2021-11-19 13:29:51,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:51,584 INFO L470 AbstractCegarLoop]: Abstraction has 25708 states and 45676 transitions. [2021-11-19 13:29:51,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-19 13:29:51,584 INFO L276 IsEmpty]: Start isEmpty. Operand 25708 states and 45676 transitions. [2021-11-19 13:29:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-19 13:29:51,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:51,588 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:51,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-19 13:29:51,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:51,808 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:51,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:51,808 INFO L85 PathProgramCache]: Analyzing trace with hash 742432818, now seen corresponding path program 1 times [2021-11-19 13:29:51,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:51,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478064495] [2021-11-19 13:29:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:51,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:51,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:51,810 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:51,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:29:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:52,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:29:52,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 13:29:52,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 13:29:52,870 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:52,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478064495] [2021-11-19 13:29:52,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478064495] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:52,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:52,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:29:52,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638349857] [2021-11-19 13:29:52,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:52,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:29:52,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:52,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:29:52,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:29:52,874 INFO L87 Difference]: Start difference. First operand 25708 states and 45676 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 13:29:55,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:55,703 INFO L93 Difference]: Finished difference Result 51590 states and 96408 transitions. [2021-11-19 13:29:55,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:29:55,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 157 [2021-11-19 13:29:55,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:55,911 INFO L225 Difference]: With dead ends: 51590 [2021-11-19 13:29:55,912 INFO L226 Difference]: Without dead ends: 25900 [2021-11-19 13:29:56,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:29:56,543 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 796 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 2216 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:56,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 2216 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:29:56,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2021-11-19 13:29:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 25900. [2021-11-19 13:29:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25900 states, 19852 states have (on average 1.5603969373362885) internal successors, (30977), 20590 states have internal predecessors, (30977), 4565 states have call successors, (4565), 1395 states have call predecessors, (4565), 1482 states have return successors, (10326), 4522 states have call predecessors, (10326), 4515 states have call successors, (10326) [2021-11-19 13:29:58,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25900 states to 25900 states and 45868 transitions. [2021-11-19 13:29:58,432 INFO L78 Accepts]: Start accepts. Automaton has 25900 states and 45868 transitions. Word has length 157 [2021-11-19 13:29:58,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:58,433 INFO L470 AbstractCegarLoop]: Abstraction has 25900 states and 45868 transitions. [2021-11-19 13:29:58,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 13:29:58,433 INFO L276 IsEmpty]: Start isEmpty. Operand 25900 states and 45868 transitions. [2021-11-19 13:29:58,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-19 13:29:58,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:58,437 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:58,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-19 13:29:58,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:58,655 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:58,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:58,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1559113228, now seen corresponding path program 1 times [2021-11-19 13:29:58,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:58,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439447715] [2021-11-19 13:29:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:58,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:58,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:58,657 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:58,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 13:29:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:58,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:29:58,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 13:29:59,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 13:29:59,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:59,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439447715] [2021-11-19 13:29:59,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439447715] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:59,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:59,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:29:59,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60444410] [2021-11-19 13:29:59,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:59,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:29:59,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:59,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:29:59,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:29:59,742 INFO L87 Difference]: Start difference. First operand 25900 states and 45868 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 13:30:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:02,375 INFO L93 Difference]: Finished difference Result 52022 states and 96760 transitions. [2021-11-19 13:30:02,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:30:02,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 159 [2021-11-19 13:30:02,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:02,564 INFO L225 Difference]: With dead ends: 52022 [2021-11-19 13:30:02,564 INFO L226 Difference]: Without dead ends: 26140 [2021-11-19 13:30:03,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:30:03,049 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 803 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 2217 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:03,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 2217 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:30:03,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26140 states. [2021-11-19 13:30:04,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26140 to 26140. [2021-11-19 13:30:04,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26140 states, 20044 states have (on average 1.5550289363400518) internal successors, (31169), 20782 states have internal predecessors, (31169), 4565 states have call successors, (4565), 1443 states have call predecessors, (4565), 1530 states have return successors, (10374), 4522 states have call predecessors, (10374), 4515 states have call successors, (10374) [2021-11-19 13:30:04,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26140 states to 26140 states and 46108 transitions. [2021-11-19 13:30:04,903 INFO L78 Accepts]: Start accepts. Automaton has 26140 states and 46108 transitions. Word has length 159 [2021-11-19 13:30:04,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:04,904 INFO L470 AbstractCegarLoop]: Abstraction has 26140 states and 46108 transitions. [2021-11-19 13:30:04,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 13:30:04,904 INFO L276 IsEmpty]: Start isEmpty. Operand 26140 states and 46108 transitions. [2021-11-19 13:30:04,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-19 13:30:04,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:04,907 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:04,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:05,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:05,126 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:05,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:05,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1311372146, now seen corresponding path program 1 times [2021-11-19 13:30:05,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:05,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866030605] [2021-11-19 13:30:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:05,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:05,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:05,129 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:05,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:30:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:05,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:30:05,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 13:30:05,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 13:30:06,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:06,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866030605] [2021-11-19 13:30:06,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866030605] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:30:06,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:30:06,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:30:06,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626280021] [2021-11-19 13:30:06,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:06,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:30:06,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:06,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:30:06,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:30:06,168 INFO L87 Difference]: Start difference. First operand 26140 states and 46108 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 13:30:08,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:08,905 INFO L93 Difference]: Finished difference Result 52550 states and 97232 transitions. [2021-11-19 13:30:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:30:08,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 161 [2021-11-19 13:30:08,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:09,351 INFO L225 Difference]: With dead ends: 52550 [2021-11-19 13:30:09,351 INFO L226 Difference]: Without dead ends: 26428 [2021-11-19 13:30:09,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:30:09,596 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 794 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 2217 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:09,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 2217 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:30:09,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26428 states. [2021-11-19 13:30:10,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26428 to 26428. [2021-11-19 13:30:10,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26428 states, 20284 states have (on average 1.5484618418457898) internal successors, (31409), 21022 states have internal predecessors, (31409), 4565 states have call successors, (4565), 1491 states have call predecessors, (4565), 1578 states have return successors, (10422), 4522 states have call predecessors, (10422), 4515 states have call successors, (10422) [2021-11-19 13:30:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26428 states to 26428 states and 46396 transitions. [2021-11-19 13:30:11,269 INFO L78 Accepts]: Start accepts. Automaton has 26428 states and 46396 transitions. Word has length 161 [2021-11-19 13:30:11,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:11,270 INFO L470 AbstractCegarLoop]: Abstraction has 26428 states and 46396 transitions. [2021-11-19 13:30:11,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 13:30:11,270 INFO L276 IsEmpty]: Start isEmpty. Operand 26428 states and 46396 transitions. [2021-11-19 13:30:11,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-19 13:30:11,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:11,273 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:11,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:11,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:11,486 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:11,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:11,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1647871532, now seen corresponding path program 1 times [2021-11-19 13:30:11,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:11,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048268087] [2021-11-19 13:30:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:11,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:11,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:11,488 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:11,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 13:30:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:11,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:30:11,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 13:30:12,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 13:30:12,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:12,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048268087] [2021-11-19 13:30:12,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048268087] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:30:12,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:30:12,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:30:12,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586329] [2021-11-19 13:30:12,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:12,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:30:12,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:12,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:30:12,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:30:12,503 INFO L87 Difference]: Start difference. First operand 26428 states and 46396 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 13:30:15,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:15,297 INFO L93 Difference]: Finished difference Result 53174 states and 97812 transitions. [2021-11-19 13:30:15,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:30:15,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 163 [2021-11-19 13:30:15,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:15,533 INFO L225 Difference]: With dead ends: 53174 [2021-11-19 13:30:15,533 INFO L226 Difference]: Without dead ends: 26764 [2021-11-19 13:30:16,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:30:16,199 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 795 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 2217 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:16,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 2217 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:30:16,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26764 states. [2021-11-19 13:30:17,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26764 to 26764. [2021-11-19 13:30:17,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26764 states, 20572 states have (on average 1.5407835893447404) internal successors, (31697), 21310 states have internal predecessors, (31697), 4565 states have call successors, (4565), 1539 states have call predecessors, (4565), 1626 states have return successors, (10470), 4522 states have call predecessors, (10470), 4515 states have call successors, (10470) [2021-11-19 13:30:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26764 states to 26764 states and 46732 transitions. [2021-11-19 13:30:17,650 INFO L78 Accepts]: Start accepts. Automaton has 26764 states and 46732 transitions. Word has length 163 [2021-11-19 13:30:17,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:17,650 INFO L470 AbstractCegarLoop]: Abstraction has 26764 states and 46732 transitions. [2021-11-19 13:30:17,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 13:30:17,651 INFO L276 IsEmpty]: Start isEmpty. Operand 26764 states and 46732 transitions. [2021-11-19 13:30:17,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-19 13:30:17,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:17,652 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:17,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:17,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:17,853 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:17,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:17,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1562831694, now seen corresponding path program 1 times [2021-11-19 13:30:17,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:17,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744629825] [2021-11-19 13:30:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:17,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:17,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:17,855 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:17,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 13:30:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:18,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:30:18,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 13:30:19,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-19 13:30:19,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:19,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744629825] [2021-11-19 13:30:19,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744629825] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:30:19,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:30:19,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-19 13:30:19,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138024123] [2021-11-19 13:30:19,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:19,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:30:19,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:19,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:30:19,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:30:19,457 INFO L87 Difference]: Start difference. First operand 26764 states and 46732 transitions. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-19 13:30:24,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:24,421 INFO L93 Difference]: Finished difference Result 59870 states and 111466 transitions. [2021-11-19 13:30:24,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:30:24,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 165 [2021-11-19 13:30:24,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:24,660 INFO L225 Difference]: With dead ends: 59870 [2021-11-19 13:30:24,660 INFO L226 Difference]: Without dead ends: 33124 [2021-11-19 13:30:25,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:30:25,161 INFO L933 BasicCegarLoop]: 1106 mSDtfsCounter, 2394 mSDsluCounter, 2865 mSDsCounter, 0 mSdLazyCounter, 2045 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2451 SdHoareTripleChecker+Valid, 3971 SdHoareTripleChecker+Invalid, 2376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 2045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:25,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2451 Valid, 3971 Invalid, 2376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 2045 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-19 13:30:25,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33124 states. [2021-11-19 13:30:26,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33124 to 26764. [2021-11-19 13:30:26,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26764 states, 20572 states have (on average 1.5400058331713007) internal successors, (31681), 21310 states have internal predecessors, (31681), 4565 states have call successors, (4565), 1539 states have call predecessors, (4565), 1626 states have return successors, (10470), 4522 states have call predecessors, (10470), 4515 states have call successors, (10470) [2021-11-19 13:30:27,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26764 states to 26764 states and 46716 transitions. [2021-11-19 13:30:27,263 INFO L78 Accepts]: Start accepts. Automaton has 26764 states and 46716 transitions. Word has length 165 [2021-11-19 13:30:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:27,266 INFO L470 AbstractCegarLoop]: Abstraction has 26764 states and 46716 transitions. [2021-11-19 13:30:27,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-19 13:30:27,270 INFO L276 IsEmpty]: Start isEmpty. Operand 26764 states and 46716 transitions. [2021-11-19 13:30:27,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-19 13:30:27,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:27,273 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:27,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:27,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:27,473 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:27,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:27,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1540540050, now seen corresponding path program 1 times [2021-11-19 13:30:27,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:27,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034259147] [2021-11-19 13:30:27,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:27,475 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:27,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:27,476 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:27,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a23ebb6b-1483-430a-9cf4-fcc7ffcf4106/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 13:30:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:27,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 13:30:27,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 13:30:28,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 13:30:28,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:28,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034259147] [2021-11-19 13:30:28,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034259147] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:30:28,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:30:28,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-19 13:30:28,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047449830] [2021-11-19 13:30:28,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:28,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:30:28,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:28,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:30:28,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:30:28,508 INFO L87 Difference]: Start difference. First operand 26764 states and 46716 transitions. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 13:30:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:33,754 INFO L93 Difference]: Finished difference Result 90198 states and 173374 transitions. [2021-11-19 13:30:33,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:30:33,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 171 [2021-11-19 13:30:33,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:34,257 INFO L225 Difference]: With dead ends: 90198 [2021-11-19 13:30:34,257 INFO L226 Difference]: Without dead ends: 63452 [2021-11-19 13:30:34,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:30:34,921 INFO L933 BasicCegarLoop]: 1334 mSDtfsCounter, 1030 mSDsluCounter, 6081 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 7415 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:34,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1066 Valid, 7415 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 13:30:34,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63452 states.