./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH --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 a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:51:48,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:51:48,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:51:48,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:51:48,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:51:48,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:51:48,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:51:48,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:51:48,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:51:48,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:51:48,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:51:48,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:51:48,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:51:48,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:51:48,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:51:48,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:51:48,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:51:48,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:51:48,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:51:48,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:51:48,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:51:48,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:51:48,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:51:48,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:51:48,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:51:48,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:51:48,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:51:48,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:51:48,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:51:48,389 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:51:48,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:51:48,391 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:51:48,392 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:51:48,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:51:48,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:51:48,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:51:48,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:51:48,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:51:48,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:51:48,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:51:48,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:51:48,402 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:51:48,453 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:51:48,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:51:48,459 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:51:48,460 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:51:48,460 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:51:48,460 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:51:48,461 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:51:48,461 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:51:48,469 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:51:48,470 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:51:48,471 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:51:48,472 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:51:48,472 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:51:48,472 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:51:48,473 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:51:48,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:51:48,474 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:51:48,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:51:48,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:51:48,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:51:48,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:51:48,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:51:48,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:51:48,477 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:51:48,477 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:51:48,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:51:48,478 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:51:48,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:51:48,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:51:48,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:51:48,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:51:48,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:51:48,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:51:48,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:51:48,483 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:51:48,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:51:48,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:51:48,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:51:48,484 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:51:48,485 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_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece [2021-11-03 04:51:48,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:51:48,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:51:48,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:51:48,917 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:51:48,917 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:51:48,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2021-11-03 04:51:49,019 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/data/3792d339f/0832eb2e746b4becb93316676e2c4725/FLAG90c12af23 [2021-11-03 04:51:49,776 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:51:49,777 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2021-11-03 04:51:49,804 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/data/3792d339f/0832eb2e746b4becb93316676e2c4725/FLAG90c12af23 [2021-11-03 04:51:49,955 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/data/3792d339f/0832eb2e746b4becb93316676e2c4725 [2021-11-03 04:51:49,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:51:49,959 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:51:49,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:51:49,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:51:49,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:51:49,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:51:49" (1/1) ... [2021-11-03 04:51:49,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7052baf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:49, skipping insertion in model container [2021-11-03 04:51:49,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:51:49" (1/1) ... [2021-11-03 04:51:49,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:51:50,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:51:50,330 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2021-11-03 04:51:50,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:51:50,845 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) [2021-11-03 04:51:50,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5ff88b19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:50, skipping insertion in model container [2021-11-03 04:51:50,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:51:50,847 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:51:50,850 INFO L168 Benchmark]: Toolchain (without parser) took 889.09 ms. Allocated memory was 86.0 MB in the beginning and 138.4 MB in the end (delta: 52.4 MB). Free memory was 49.0 MB in the beginning and 99.6 MB in the end (delta: -50.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:51:50,852 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 86.0 MB. Free memory was 58.1 MB in the beginning and 58.1 MB in the end (delta: 29.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:51:50,855 INFO L168 Benchmark]: CACSL2BoogieTranslator took 883.38 ms. Allocated memory was 86.0 MB in the beginning and 138.4 MB in the end (delta: 52.4 MB). Free memory was 48.8 MB in the beginning and 99.6 MB in the end (delta: -50.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:51:50,858 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 86.0 MB. Free memory was 58.1 MB in the beginning and 58.1 MB in the end (delta: 29.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 883.38 ms. Allocated memory was 86.0 MB in the beginning and 138.4 MB in the end (delta: 52.4 MB). Free memory was 48.8 MB in the beginning and 99.6 MB in the end (delta: -50.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2544]: 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_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH --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 a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:51:53,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:51:53,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:51:53,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:51:53,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:51:53,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:51:53,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:51:53,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:51:53,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:51:53,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:51:53,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:51:53,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:51:53,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:51:53,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:51:53,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:51:53,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:51:53,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:51:53,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:51:53,867 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:51:53,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:51:53,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:51:53,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:51:53,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:51:53,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:51:53,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:51:53,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:51:53,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:51:53,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:51:53,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:51:53,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:51:53,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:51:53,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:51:53,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:51:53,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:51:53,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:51:53,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:51:53,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:51:53,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:51:53,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:51:53,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:51:53,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:51:53,924 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:51:53,983 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:51:53,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:51:53,985 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:51:53,986 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:51:53,986 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:51:53,986 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:51:53,987 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:51:53,987 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:51:53,987 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:51:53,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:51:53,991 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:51:53,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:51:53,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:51:53,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:51:53,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:51:53,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:51:53,993 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:51:53,993 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:51:53,993 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:51:53,994 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:51:53,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:51:53,994 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:51:53,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:51:53,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:51:53,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:51:53,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:51:53,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:51:53,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:51:53,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:51:53,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:51:53,997 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:51:53,997 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:51:53,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:51:53,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:51:53,999 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:51:53,999 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_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece [2021-11-03 04:51:54,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:51:54,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:51:54,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:51:54,501 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:51:54,502 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:51:54,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2021-11-03 04:51:54,589 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/data/478a09bb5/f9439b408ab144a6af82c63fc3154535/FLAGefbef33a7 [2021-11-03 04:51:55,539 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:51:55,540 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2021-11-03 04:51:55,585 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/data/478a09bb5/f9439b408ab144a6af82c63fc3154535/FLAGefbef33a7 [2021-11-03 04:51:55,656 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/data/478a09bb5/f9439b408ab144a6af82c63fc3154535 [2021-11-03 04:51:55,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:51:55,662 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:51:55,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:51:55,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:51:55,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:51:55,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:51:55" (1/1) ... [2021-11-03 04:51:55,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52bc85f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:55, skipping insertion in model container [2021-11-03 04:51:55,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:51:55" (1/1) ... [2021-11-03 04:51:55,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:51:55,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:51:55,989 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2021-11-03 04:51:56,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:51:56,543 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:51:56,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:51:56,609 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2021-11-03 04:51:56,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:51:56,827 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:51:56,842 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2021-11-03 04:51:56,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:51:57,004 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:51:57,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:57 WrapperNode [2021-11-03 04:51:57,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:51:57,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:51:57,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:51:57,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:51:57,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:57" (1/1) ... [2021-11-03 04:51:57,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:57" (1/1) ... [2021-11-03 04:51:57,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:51:57,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:51:57,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:51:57,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:51:57,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:57" (1/1) ... [2021-11-03 04:51:57,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:57" (1/1) ... [2021-11-03 04:51:57,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:57" (1/1) ... [2021-11-03 04:51:57,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:57" (1/1) ... [2021-11-03 04:51:57,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:57" (1/1) ... [2021-11-03 04:51:57,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:57" (1/1) ... [2021-11-03 04:51:57,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:57" (1/1) ... [2021-11-03 04:51:57,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:51:57,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:51:57,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:51:57,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:51:57,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:57" (1/1) ... [2021-11-03 04:51:57,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:51:57,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:51:57,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:51:57,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:51:57,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:51:57,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:51:57,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:51:57,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:52:07,105 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:52:07,106 INFO L299 CfgBuilder]: Removed 445 assume(true) statements. [2021-11-03 04:52:07,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:52:07 BoogieIcfgContainer [2021-11-03 04:52:07,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:52:07,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:52:07,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:52:07,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:52:07,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:51:55" (1/3) ... [2021-11-03 04:52:07,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d59af02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:52:07, skipping insertion in model container [2021-11-03 04:52:07,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:57" (2/3) ... [2021-11-03 04:52:07,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d59af02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:52:07, skipping insertion in model container [2021-11-03 04:52:07,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:52:07" (3/3) ... [2021-11-03 04:52:07,124 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product01.cil.c [2021-11-03 04:52:07,131 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:52:07,131 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 04:52:07,216 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:52:07,228 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 [2021-11-03 04:52:07,229 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 04:52:07,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 2211 states, 2205 states have (on average 1.9065759637188209) internal successors, (4204), 2210 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:07,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-03 04:52:07,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:07,373 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:07,374 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:52:07,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:07,385 INFO L85 PathProgramCache]: Analyzing trace with hash -560062675, now seen corresponding path program 1 times [2021-11-03 04:52:07,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:07,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136182708] [2021-11-03 04:52:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:07,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:07,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:07,410 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:07,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:52:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:07,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:52:07,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:08,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:08,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:08,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136182708] [2021-11-03 04:52:08,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136182708] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:08,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:08,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:52:08,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979400313] [2021-11-03 04:52:08,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:52:08,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:08,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:52:08,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:52:08,324 INFO L87 Difference]: Start difference. First operand has 2211 states, 2205 states have (on average 1.9065759637188209) internal successors, (4204), 2210 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:08,473 INFO L93 Difference]: Finished difference Result 2230 states and 4227 transitions. [2021-11-03 04:52:08,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:52:08,475 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-03 04:52:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:08,538 INFO L225 Difference]: With dead ends: 2230 [2021-11-03 04:52:08,538 INFO L226 Difference]: Without dead ends: 2207 [2021-11-03 04:52:08,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:52:08,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-11-03 04:52:08,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2207. [2021-11-03 04:52:08,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2202 states have (on average 1.9037238873751134) internal successors, (4192), 2206 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:08,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 4192 transitions. [2021-11-03 04:52:08,810 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 4192 transitions. Word has length 47 [2021-11-03 04:52:08,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:08,811 INFO L470 AbstractCegarLoop]: Abstraction has 2207 states and 4192 transitions. [2021-11-03 04:52:08,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:08,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 4192 transitions. [2021-11-03 04:52:08,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-03 04:52:08,821 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:08,821 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:08,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 04:52:09,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:09,040 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:52:09,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:09,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1979125007, now seen corresponding path program 1 times [2021-11-03 04:52:09,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:09,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948296113] [2021-11-03 04:52:09,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:09,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:09,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:09,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:09,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:52:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:09,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:52:09,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:09,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:09,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:09,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948296113] [2021-11-03 04:52:09,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948296113] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:09,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:09,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:52:09,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369440611] [2021-11-03 04:52:09,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:52:09,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:09,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:52:09,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:09,899 INFO L87 Difference]: Start difference. First operand 2207 states and 4192 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:10,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:10,290 INFO L93 Difference]: Finished difference Result 6541 states and 12433 transitions. [2021-11-03 04:52:10,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:52:10,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-03 04:52:10,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:10,327 INFO L225 Difference]: With dead ends: 6541 [2021-11-03 04:52:10,327 INFO L226 Difference]: Without dead ends: 4347 [2021-11-03 04:52:10,337 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:10,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2021-11-03 04:52:10,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 2207. [2021-11-03 04:52:10,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2202 states have (on average 1.9005449591280654) internal successors, (4185), 2206 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:10,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 4185 transitions. [2021-11-03 04:52:10,469 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 4185 transitions. Word has length 49 [2021-11-03 04:52:10,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:10,470 INFO L470 AbstractCegarLoop]: Abstraction has 2207 states and 4185 transitions. [2021-11-03 04:52:10,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 4185 transitions. [2021-11-03 04:52:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-03 04:52:10,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:10,485 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:10,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:10,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:10,703 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:52:10,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:10,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1052187826, now seen corresponding path program 1 times [2021-11-03 04:52:10,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:10,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347322104] [2021-11-03 04:52:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:10,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:10,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:10,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:10,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:52:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:11,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:52:11,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:11,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:11,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:11,590 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:11,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347322104] [2021-11-03 04:52:11,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347322104] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:11,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:11,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:52:11,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570495222] [2021-11-03 04:52:11,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:52:11,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:11,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:52:11,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:52:11,594 INFO L87 Difference]: Start difference. First operand 2207 states and 4185 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:12,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:12,818 INFO L93 Difference]: Finished difference Result 14924 states and 28347 transitions. [2021-11-03 04:52:12,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:52:12,819 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-03 04:52:12,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:12,996 INFO L225 Difference]: With dead ends: 14924 [2021-11-03 04:52:12,996 INFO L226 Difference]: Without dead ends: 12739 [2021-11-03 04:52:13,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:52:13,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12739 states. [2021-11-03 04:52:13,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12739 to 2185. [2021-11-03 04:52:13,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 2180 states have (on average 1.8963302752293578) internal successors, (4134), 2184 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 4134 transitions. [2021-11-03 04:52:13,241 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 4134 transitions. Word has length 55 [2021-11-03 04:52:13,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:13,242 INFO L470 AbstractCegarLoop]: Abstraction has 2185 states and 4134 transitions. [2021-11-03 04:52:13,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:13,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 4134 transitions. [2021-11-03 04:52:13,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 04:52:13,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:13,246 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:13,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:13,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:13,463 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:52:13,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:13,464 INFO L85 PathProgramCache]: Analyzing trace with hash 565040943, now seen corresponding path program 1 times [2021-11-03 04:52:13,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:13,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034074283] [2021-11-03 04:52:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:13,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:13,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:13,471 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:13,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:52:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:13,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:52:13,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:14,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:14,372 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:14,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034074283] [2021-11-03 04:52:14,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034074283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:14,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:14,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:52:14,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524517277] [2021-11-03 04:52:14,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:52:14,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:14,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:52:14,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:14,378 INFO L87 Difference]: Start difference. First operand 2185 states and 4134 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:14,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:14,802 INFO L93 Difference]: Finished difference Result 6452 states and 12237 transitions. [2021-11-03 04:52:14,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:52:14,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-03 04:52:14,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:14,850 INFO L225 Difference]: With dead ends: 6452 [2021-11-03 04:52:14,850 INFO L226 Difference]: Without dead ends: 4289 [2021-11-03 04:52:14,856 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:14,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2021-11-03 04:52:15,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 2185. [2021-11-03 04:52:15,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 2180 states have (on average 1.8912844036697247) internal successors, (4123), 2184 states have internal predecessors, (4123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 4123 transitions. [2021-11-03 04:52:15,111 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 4123 transitions. Word has length 57 [2021-11-03 04:52:15,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:15,113 INFO L470 AbstractCegarLoop]: Abstraction has 2185 states and 4123 transitions. [2021-11-03 04:52:15,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:15,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 4123 transitions. [2021-11-03 04:52:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 04:52:15,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:15,118 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:15,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:15,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:15,331 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:52:15,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:15,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1109058372, now seen corresponding path program 1 times [2021-11-03 04:52:15,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:15,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146556578] [2021-11-03 04:52:15,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:15,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:15,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:15,336 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:15,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:52:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:15,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:52:15,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:16,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:16,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:16,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146556578] [2021-11-03 04:52:16,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146556578] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:16,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:16,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:52:16,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907065505] [2021-11-03 04:52:16,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:52:16,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:16,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:52:16,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:52:16,393 INFO L87 Difference]: Start difference. First operand 2185 states and 4123 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:18,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:18,854 INFO L93 Difference]: Finished difference Result 23279 states and 44187 transitions. [2021-11-03 04:52:18,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:52:18,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-03 04:52:18,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:18,921 INFO L225 Difference]: With dead ends: 23279 [2021-11-03 04:52:18,922 INFO L226 Difference]: Without dead ends: 21119 [2021-11-03 04:52:18,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:52:18,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21119 states. [2021-11-03 04:52:19,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21119 to 2187. [2021-11-03 04:52:19,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2182 states have (on average 1.8881759853345554) internal successors, (4120), 2186 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 4120 transitions. [2021-11-03 04:52:19,258 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 4120 transitions. Word has length 63 [2021-11-03 04:52:19,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:19,258 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 4120 transitions. [2021-11-03 04:52:19,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:19,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 4120 transitions. [2021-11-03 04:52:19,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-03 04:52:19,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:19,261 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:19,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:19,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:19,475 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:52:19,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:19,476 INFO L85 PathProgramCache]: Analyzing trace with hash 503610071, now seen corresponding path program 1 times [2021-11-03 04:52:19,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:19,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741011325] [2021-11-03 04:52:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:19,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:19,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:19,482 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:19,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:52:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:19,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:52:19,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:20,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:20,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:20,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741011325] [2021-11-03 04:52:20,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741011325] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:20,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:20,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:52:20,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590666871] [2021-11-03 04:52:20,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:52:20,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:20,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:52:20,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:52:20,470 INFO L87 Difference]: Start difference. First operand 2187 states and 4120 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:22,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:22,943 INFO L93 Difference]: Finished difference Result 23247 states and 44108 transitions. [2021-11-03 04:52:22,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:52:22,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-03 04:52:22,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:23,006 INFO L225 Difference]: With dead ends: 23247 [2021-11-03 04:52:23,006 INFO L226 Difference]: Without dead ends: 21087 [2021-11-03 04:52:23,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:52:23,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21087 states. [2021-11-03 04:52:23,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21087 to 2191. [2021-11-03 04:52:23,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2186 states have (on average 1.8860933211344921) internal successors, (4123), 2190 states have internal predecessors, (4123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:23,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 4123 transitions. [2021-11-03 04:52:23,372 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 4123 transitions. Word has length 65 [2021-11-03 04:52:23,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:23,373 INFO L470 AbstractCegarLoop]: Abstraction has 2191 states and 4123 transitions. [2021-11-03 04:52:23,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 4123 transitions. [2021-11-03 04:52:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 04:52:23,376 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:23,377 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:23,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:23,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:23,595 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:52:23,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:23,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1348908996, now seen corresponding path program 1 times [2021-11-03 04:52:23,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:23,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306176497] [2021-11-03 04:52:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:23,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:23,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:23,599 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:23,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:52:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:24,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:52:24,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:24,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:24,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:24,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306176497] [2021-11-03 04:52:24,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306176497] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:24,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:24,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:52:24,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254557908] [2021-11-03 04:52:24,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:52:24,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:24,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:52:24,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:24,617 INFO L87 Difference]: Start difference. First operand 2191 states and 4123 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:24,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:24,872 INFO L93 Difference]: Finished difference Result 4330 states and 8177 transitions. [2021-11-03 04:52:24,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:52:24,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-03 04:52:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:24,877 INFO L225 Difference]: With dead ends: 4330 [2021-11-03 04:52:24,877 INFO L226 Difference]: Without dead ends: 2170 [2021-11-03 04:52:24,880 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:24,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-11-03 04:52:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 2170. [2021-11-03 04:52:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2165 states have (on average 1.8868360277136258) internal successors, (4085), 2169 states have internal predecessors, (4085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 4085 transitions. [2021-11-03 04:52:25,017 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 4085 transitions. Word has length 67 [2021-11-03 04:52:25,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:25,018 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 4085 transitions. [2021-11-03 04:52:25,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:25,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 4085 transitions. [2021-11-03 04:52:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:52:25,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:25,021 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:25,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:25,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:25,239 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:52:25,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:25,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1899032036, now seen corresponding path program 1 times [2021-11-03 04:52:25,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:25,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475451487] [2021-11-03 04:52:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:25,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:25,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:25,242 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:25,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:52:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:25,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:52:25,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:26,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:26,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:26,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475451487] [2021-11-03 04:52:26,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475451487] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:26,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:26,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:52:26,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695311935] [2021-11-03 04:52:26,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:52:26,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:26,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:52:26,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:52:26,247 INFO L87 Difference]: Start difference. First operand 2170 states and 4085 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:26,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:26,396 INFO L93 Difference]: Finished difference Result 4274 states and 8080 transitions. [2021-11-03 04:52:26,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:52:26,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-03 04:52:26,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:26,400 INFO L225 Difference]: With dead ends: 4274 [2021-11-03 04:52:26,400 INFO L226 Difference]: Without dead ends: 2145 [2021-11-03 04:52:26,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:52:26,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-11-03 04:52:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 2145. [2021-11-03 04:52:26,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2140 states have (on average 1.888317757009346) internal successors, (4041), 2144 states have internal predecessors, (4041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 4041 transitions. [2021-11-03 04:52:26,550 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 4041 transitions. Word has length 68 [2021-11-03 04:52:26,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:26,551 INFO L470 AbstractCegarLoop]: Abstraction has 2145 states and 4041 transitions. [2021-11-03 04:52:26,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 4041 transitions. [2021-11-03 04:52:26,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:52:26,554 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:26,554 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:26,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:26,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:26,773 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:52:26,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:26,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1571267789, now seen corresponding path program 1 times [2021-11-03 04:52:26,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:26,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823750953] [2021-11-03 04:52:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:26,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:26,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:26,775 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:26,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:52:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:27,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:52:27,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:27,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:27,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:27,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823750953] [2021-11-03 04:52:27,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823750953] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:27,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:27,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:52:27,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238990184] [2021-11-03 04:52:27,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:52:27,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:27,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:52:27,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:27,843 INFO L87 Difference]: Start difference. First operand 2145 states and 4041 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:28,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:28,053 INFO L93 Difference]: Finished difference Result 4249 states and 8036 transitions. [2021-11-03 04:52:28,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:52:28,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 04:52:28,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:28,058 INFO L225 Difference]: With dead ends: 4249 [2021-11-03 04:52:28,058 INFO L226 Difference]: Without dead ends: 2142 [2021-11-03 04:52:28,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:28,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2021-11-03 04:52:28,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2142. [2021-11-03 04:52:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2137 states have (on average 1.8872250818905008) internal successors, (4033), 2141 states have internal predecessors, (4033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:28,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 4033 transitions. [2021-11-03 04:52:28,204 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 4033 transitions. Word has length 69 [2021-11-03 04:52:28,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:28,205 INFO L470 AbstractCegarLoop]: Abstraction has 2142 states and 4033 transitions. [2021-11-03 04:52:28,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:28,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 4033 transitions. [2021-11-03 04:52:28,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 04:52:28,208 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:28,208 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:28,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-03 04:52:28,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:28,426 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:52:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:28,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1645173598, now seen corresponding path program 1 times [2021-11-03 04:52:28,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:28,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707204705] [2021-11-03 04:52:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:28,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:28,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:28,428 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:28,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:52:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:29,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:52:29,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:29,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:29,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:29,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707204705] [2021-11-03 04:52:29,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707204705] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:29,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:29,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:52:29,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421262442] [2021-11-03 04:52:29,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:52:29,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:29,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:52:29,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:52:29,438 INFO L87 Difference]: Start difference. First operand 2142 states and 4033 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:29,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:29,607 INFO L93 Difference]: Finished difference Result 4240 states and 8018 transitions. [2021-11-03 04:52:29,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:52:29,608 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-03 04:52:29,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:29,613 INFO L225 Difference]: With dead ends: 4240 [2021-11-03 04:52:29,613 INFO L226 Difference]: Without dead ends: 2140 [2021-11-03 04:52:29,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:52:29,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-11-03 04:52:29,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2140. [2021-11-03 04:52:29,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2135 states have (on average 1.8861826697892272) internal successors, (4027), 2139 states have internal predecessors, (4027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:29,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 4027 transitions. [2021-11-03 04:52:29,762 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 4027 transitions. Word has length 70 [2021-11-03 04:52:29,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:29,762 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 4027 transitions. [2021-11-03 04:52:29,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:29,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 4027 transitions. [2021-11-03 04:52:29,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 04:52:29,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:29,766 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:29,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:29,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:29,984 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:52:29,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:29,984 INFO L85 PathProgramCache]: Analyzing trace with hash -449475602, now seen corresponding path program 1 times [2021-11-03 04:52:29,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:29,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94514259] [2021-11-03 04:52:29,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:29,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:29,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:29,986 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:29,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:52:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:30,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:52:30,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:30,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:31,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:31,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94514259] [2021-11-03 04:52:31,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94514259] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:31,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:31,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:52:31,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254979046] [2021-11-03 04:52:31,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:52:31,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:31,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:52:31,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:52:31,057 INFO L87 Difference]: Start difference. First operand 2140 states and 4027 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:31,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:31,292 INFO L93 Difference]: Finished difference Result 4233 states and 8003 transitions. [2021-11-03 04:52:31,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:52:31,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 04:52:31,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:31,296 INFO L225 Difference]: With dead ends: 4233 [2021-11-03 04:52:31,296 INFO L226 Difference]: Without dead ends: 2138 [2021-11-03 04:52:31,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:52:31,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-11-03 04:52:31,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 2138. [2021-11-03 04:52:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2133 states have (on average 1.8851383028598219) internal successors, (4021), 2137 states have internal predecessors, (4021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 4021 transitions. [2021-11-03 04:52:31,414 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 4021 transitions. Word has length 71 [2021-11-03 04:52:31,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:31,414 INFO L470 AbstractCegarLoop]: Abstraction has 2138 states and 4021 transitions. [2021-11-03 04:52:31,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:31,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 4021 transitions. [2021-11-03 04:52:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-03 04:52:31,417 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:31,417 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:31,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:31,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:31,636 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:52:31,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:31,636 INFO L85 PathProgramCache]: Analyzing trace with hash -332311091, now seen corresponding path program 1 times [2021-11-03 04:52:31,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:31,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031496419] [2021-11-03 04:52:31,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:31,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:31,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:31,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:31,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:52:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:32,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:52:32,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:32,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:32,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:32,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031496419] [2021-11-03 04:52:32,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031496419] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:32,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:32,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:52:32,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878628485] [2021-11-03 04:52:32,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:52:32,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:32,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:52:32,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:52:32,853 INFO L87 Difference]: Start difference. First operand 2138 states and 4021 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:35,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:35,335 INFO L93 Difference]: Finished difference Result 8548 states and 16121 transitions. [2021-11-03 04:52:35,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:52:35,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-03 04:52:35,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:35,347 INFO L225 Difference]: With dead ends: 8548 [2021-11-03 04:52:35,347 INFO L226 Difference]: Without dead ends: 6470 [2021-11-03 04:52:35,351 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:52:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6470 states. [2021-11-03 04:52:35,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6470 to 2142. [2021-11-03 04:52:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2137 states have (on average 1.8834815161441272) internal successors, (4025), 2141 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:35,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 4025 transitions. [2021-11-03 04:52:35,597 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 4025 transitions. Word has length 72 [2021-11-03 04:52:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:35,597 INFO L470 AbstractCegarLoop]: Abstraction has 2142 states and 4025 transitions. [2021-11-03 04:52:35,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:35,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 4025 transitions. [2021-11-03 04:52:35,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:52:35,601 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:35,601 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:35,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:35,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:35,820 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:52:35,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:35,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1748734085, now seen corresponding path program 1 times [2021-11-03 04:52:35,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:35,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123898495] [2021-11-03 04:52:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:35,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:35,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:35,823 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:35,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:52:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:36,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:52:36,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:36,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:37,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:37,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123898495] [2021-11-03 04:52:37,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123898495] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:37,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:37,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:52:37,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695003345] [2021-11-03 04:52:37,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:52:37,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:37,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:52:37,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:52:37,048 INFO L87 Difference]: Start difference. First operand 2142 states and 4025 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:42,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:42,045 INFO L93 Difference]: Finished difference Result 5849 states and 10968 transitions. [2021-11-03 04:52:42,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:52:42,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-03 04:52:42,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:42,052 INFO L225 Difference]: With dead ends: 5849 [2021-11-03 04:52:42,052 INFO L226 Difference]: Without dead ends: 4599 [2021-11-03 04:52:42,055 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:52:42,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4599 states. [2021-11-03 04:52:42,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4599 to 3908. [2021-11-03 04:52:42,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3903 states have (on average 1.8911094030233153) internal successors, (7381), 3907 states have internal predecessors, (7381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 7381 transitions. [2021-11-03 04:52:42,369 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 7381 transitions. Word has length 73 [2021-11-03 04:52:42,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:42,370 INFO L470 AbstractCegarLoop]: Abstraction has 3908 states and 7381 transitions. [2021-11-03 04:52:42,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 7381 transitions. [2021-11-03 04:52:42,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 04:52:42,374 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:42,374 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:42,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:42,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:42,596 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:52:42,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:42,596 INFO L85 PathProgramCache]: Analyzing trace with hash -798660081, now seen corresponding path program 1 times [2021-11-03 04:52:42,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:42,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938165399] [2021-11-03 04:52:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:42,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:42,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:42,598 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:42,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:52:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:43,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:52:43,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:43,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:43,861 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:43,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938165399] [2021-11-03 04:52:43,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938165399] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:43,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:43,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:52:43,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289590072] [2021-11-03 04:52:43,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:52:43,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:43,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:52:43,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:43,865 INFO L87 Difference]: Start difference. First operand 3908 states and 7381 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:45,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:45,511 INFO L93 Difference]: Finished difference Result 7384 states and 13850 transitions. [2021-11-03 04:52:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:52:45,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-03 04:52:45,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:45,517 INFO L225 Difference]: With dead ends: 7384 [2021-11-03 04:52:45,517 INFO L226 Difference]: Without dead ends: 4360 [2021-11-03 04:52:45,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:52:45,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4360 states. [2021-11-03 04:52:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4360 to 3811. [2021-11-03 04:52:45,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3806 states have (on average 1.872569626904887) internal successors, (7127), 3810 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 7127 transitions. [2021-11-03 04:52:45,820 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 7127 transitions. Word has length 74 [2021-11-03 04:52:45,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:45,820 INFO L470 AbstractCegarLoop]: Abstraction has 3811 states and 7127 transitions. [2021-11-03 04:52:45,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:45,821 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 7127 transitions. [2021-11-03 04:52:45,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:52:45,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:45,823 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:45,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:46,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:46,039 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:52:46,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:46,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1109939939, now seen corresponding path program 1 times [2021-11-03 04:52:46,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:46,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459684866] [2021-11-03 04:52:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:46,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:46,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:46,042 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:46,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:52:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:46,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:52:46,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:47,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:47,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:47,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459684866] [2021-11-03 04:52:47,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459684866] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:47,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:47,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:52:47,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201647219] [2021-11-03 04:52:47,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:52:47,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:47,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:52:47,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:52:47,314 INFO L87 Difference]: Start difference. First operand 3811 states and 7127 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:48,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:48,674 INFO L93 Difference]: Finished difference Result 27090 states and 50982 transitions. [2021-11-03 04:52:48,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:52:48,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-03 04:52:48,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:48,706 INFO L225 Difference]: With dead ends: 27090 [2021-11-03 04:52:48,706 INFO L226 Difference]: Without dead ends: 23335 [2021-11-03 04:52:48,715 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:52:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23335 states. [2021-11-03 04:52:49,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23335 to 7128. [2021-11-03 04:52:49,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7128 states, 7123 states have (on average 1.8794047451916327) internal successors, (13387), 7127 states have internal predecessors, (13387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7128 states to 7128 states and 13387 transitions. [2021-11-03 04:52:49,410 INFO L78 Accepts]: Start accepts. Automaton has 7128 states and 13387 transitions. Word has length 75 [2021-11-03 04:52:49,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:49,410 INFO L470 AbstractCegarLoop]: Abstraction has 7128 states and 13387 transitions. [2021-11-03 04:52:49,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:49,411 INFO L276 IsEmpty]: Start isEmpty. Operand 7128 states and 13387 transitions. [2021-11-03 04:52:49,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:52:49,413 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:49,413 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:49,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:49,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:49,627 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:52:49,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:49,627 INFO L85 PathProgramCache]: Analyzing trace with hash 975926433, now seen corresponding path program 1 times [2021-11-03 04:52:49,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:49,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245949610] [2021-11-03 04:52:49,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:49,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:49,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:49,630 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:49,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:52:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:50,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:52:50,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:50,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:51,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:51,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245949610] [2021-11-03 04:52:51,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245949610] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:51,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:51,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:52:51,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542499219] [2021-11-03 04:52:51,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:52:51,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:51,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:52:51,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:51,056 INFO L87 Difference]: Start difference. First operand 7128 states and 13387 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:52,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:52,203 INFO L93 Difference]: Finished difference Result 21457 states and 40385 transitions. [2021-11-03 04:52:52,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:52:52,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-03 04:52:52,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:52,227 INFO L225 Difference]: With dead ends: 21457 [2021-11-03 04:52:52,227 INFO L226 Difference]: Without dead ends: 17357 [2021-11-03 04:52:52,234 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:52:52,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17357 states. [2021-11-03 04:52:52,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17357 to 10959. [2021-11-03 04:52:52,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10959 states, 10954 states have (on average 1.8808654372831841) internal successors, (20603), 10958 states have internal predecessors, (20603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:52,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10959 states to 10959 states and 20603 transitions. [2021-11-03 04:52:52,988 INFO L78 Accepts]: Start accepts. Automaton has 10959 states and 20603 transitions. Word has length 75 [2021-11-03 04:52:52,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:52,988 INFO L470 AbstractCegarLoop]: Abstraction has 10959 states and 20603 transitions. [2021-11-03 04:52:52,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:52,989 INFO L276 IsEmpty]: Start isEmpty. Operand 10959 states and 20603 transitions. [2021-11-03 04:52:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 04:52:52,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:52,991 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:53,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:53,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:53,211 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:52:53,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:53,211 INFO L85 PathProgramCache]: Analyzing trace with hash -431085397, now seen corresponding path program 1 times [2021-11-03 04:52:53,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:53,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239819267] [2021-11-03 04:52:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:53,212 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:53,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:53,213 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:53,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:52:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:54,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:52:54,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:54,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:54,690 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:54,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239819267] [2021-11-03 04:52:54,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239819267] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:54,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:54,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:52:54,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910788743] [2021-11-03 04:52:54,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:52:54,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:54,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:52:54,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:52:54,693 INFO L87 Difference]: Start difference. First operand 10959 states and 20603 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:58,515 INFO L93 Difference]: Finished difference Result 58499 states and 110429 transitions. [2021-11-03 04:52:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:52:58,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-03 04:52:58,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:58,590 INFO L225 Difference]: With dead ends: 58499 [2021-11-03 04:52:58,590 INFO L226 Difference]: Without dead ends: 50568 [2021-11-03 04:52:58,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:52:58,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50568 states. [2021-11-03 04:52:59,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50568 to 17399. [2021-11-03 04:52:59,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17399 states, 17394 states have (on average 1.884672875704266) internal successors, (32782), 17398 states have internal predecessors, (32782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17399 states to 17399 states and 32782 transitions. [2021-11-03 04:52:59,922 INFO L78 Accepts]: Start accepts. Automaton has 17399 states and 32782 transitions. Word has length 77 [2021-11-03 04:52:59,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:59,923 INFO L470 AbstractCegarLoop]: Abstraction has 17399 states and 32782 transitions. [2021-11-03 04:52:59,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:59,923 INFO L276 IsEmpty]: Start isEmpty. Operand 17399 states and 32782 transitions. [2021-11-03 04:52:59,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-03 04:52:59,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:59,926 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:59,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-03 04:53:00,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:00,141 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:53:00,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:00,141 INFO L85 PathProgramCache]: Analyzing trace with hash 715376104, now seen corresponding path program 1 times [2021-11-03 04:53:00,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:00,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887811556] [2021-11-03 04:53:00,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:00,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:00,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:00,144 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:00,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:53:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:01,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:53:01,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:53:01,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:53:01,503 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:01,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887811556] [2021-11-03 04:53:01,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887811556] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:01,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:01,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:53:01,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705363513] [2021-11-03 04:53:01,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:53:01,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:01,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:53:01,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:53:01,506 INFO L87 Difference]: Start difference. First operand 17399 states and 32782 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:04,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:53:04,023 INFO L93 Difference]: Finished difference Result 42201 states and 79153 transitions. [2021-11-03 04:53:04,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:53:04,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-03 04:53:04,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:53:04,059 INFO L225 Difference]: With dead ends: 42201 [2021-11-03 04:53:04,059 INFO L226 Difference]: Without dead ends: 26140 [2021-11-03 04:53:04,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:53:04,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26140 states. [2021-11-03 04:53:05,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26140 to 17276. [2021-11-03 04:53:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17276 states, 17271 states have (on average 1.8720977360893984) internal successors, (32333), 17275 states have internal predecessors, (32333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:05,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17276 states to 17276 states and 32333 transitions. [2021-11-03 04:53:05,103 INFO L78 Accepts]: Start accepts. Automaton has 17276 states and 32333 transitions. Word has length 84 [2021-11-03 04:53:05,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:53:05,104 INFO L470 AbstractCegarLoop]: Abstraction has 17276 states and 32333 transitions. [2021-11-03 04:53:05,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:05,104 INFO L276 IsEmpty]: Start isEmpty. Operand 17276 states and 32333 transitions. [2021-11-03 04:53:05,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-03 04:53:05,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:53:05,106 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:53:05,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-03 04:53:05,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:05,326 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:53:05,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:05,326 INFO L85 PathProgramCache]: Analyzing trace with hash 793087147, now seen corresponding path program 1 times [2021-11-03 04:53:05,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:05,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161126046] [2021-11-03 04:53:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:05,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:05,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:05,328 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:05,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:53:06,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:06,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:53:06,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:53:06,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:53:06,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:06,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161126046] [2021-11-03 04:53:06,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161126046] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:06,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:06,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:53:06,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321240208] [2021-11-03 04:53:06,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:53:06,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:06,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:53:06,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:53:06,749 INFO L87 Difference]: Start difference. First operand 17276 states and 32333 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:07,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:53:07,715 INFO L93 Difference]: Finished difference Result 31668 states and 59225 transitions. [2021-11-03 04:53:07,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:53:07,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-03 04:53:07,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:53:07,739 INFO L225 Difference]: With dead ends: 31668 [2021-11-03 04:53:07,740 INFO L226 Difference]: Without dead ends: 17291 [2021-11-03 04:53:07,753 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:53:07,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17291 states. [2021-11-03 04:53:08,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17291 to 17276. [2021-11-03 04:53:08,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17276 states, 17271 states have (on average 1.8638758612703377) internal successors, (32191), 17275 states have internal predecessors, (32191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:08,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17276 states to 17276 states and 32191 transitions. [2021-11-03 04:53:08,862 INFO L78 Accepts]: Start accepts. Automaton has 17276 states and 32191 transitions. Word has length 84 [2021-11-03 04:53:08,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:53:08,862 INFO L470 AbstractCegarLoop]: Abstraction has 17276 states and 32191 transitions. [2021-11-03 04:53:08,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:08,863 INFO L276 IsEmpty]: Start isEmpty. Operand 17276 states and 32191 transitions. [2021-11-03 04:53:08,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 04:53:08,865 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:53:08,865 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:53:08,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:53:09,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:09,067 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:53:09,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:09,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1723936122, now seen corresponding path program 1 times [2021-11-03 04:53:09,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:09,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229824419] [2021-11-03 04:53:09,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:09,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:09,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:09,069 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:09,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:53:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:10,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:53:10,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:53:10,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:53:10,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:10,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229824419] [2021-11-03 04:53:10,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229824419] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:10,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:10,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:53:10,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139950838] [2021-11-03 04:53:10,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:53:10,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:10,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:53:10,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:53:10,695 INFO L87 Difference]: Start difference. First operand 17276 states and 32191 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:53:14,268 INFO L93 Difference]: Finished difference Result 49717 states and 92587 transitions. [2021-11-03 04:53:14,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:53:14,269 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 04:53:14,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:53:14,318 INFO L225 Difference]: With dead ends: 49717 [2021-11-03 04:53:14,318 INFO L226 Difference]: Without dead ends: 35641 [2021-11-03 04:53:14,331 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:53:14,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35641 states. [2021-11-03 04:53:15,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35641 to 14408. [2021-11-03 04:53:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14408 states, 14403 states have (on average 1.853780462403666) internal successors, (26700), 14407 states have internal predecessors, (26700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:15,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14408 states to 14408 states and 26700 transitions. [2021-11-03 04:53:15,509 INFO L78 Accepts]: Start accepts. Automaton has 14408 states and 26700 transitions. Word has length 85 [2021-11-03 04:53:15,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:53:15,509 INFO L470 AbstractCegarLoop]: Abstraction has 14408 states and 26700 transitions. [2021-11-03 04:53:15,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:15,510 INFO L276 IsEmpty]: Start isEmpty. Operand 14408 states and 26700 transitions. [2021-11-03 04:53:15,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 04:53:15,511 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:53:15,511 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:53:15,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:53:15,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:15,727 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:53:15,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:15,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1559913924, now seen corresponding path program 1 times [2021-11-03 04:53:15,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:15,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566746571] [2021-11-03 04:53:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:15,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:15,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:15,730 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:15,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:53:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:16,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:53:16,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:53:17,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:53:17,548 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:17,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566746571] [2021-11-03 04:53:17,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566746571] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:17,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:17,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 04:53:17,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339359608] [2021-11-03 04:53:17,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:53:17,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:17,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:53:17,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:53:17,550 INFO L87 Difference]: Start difference. First operand 14408 states and 26700 transitions. Second operand has 10 states, 10 states have (on average 16.1) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:31,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:53:31,183 INFO L93 Difference]: Finished difference Result 96919 states and 179230 transitions. [2021-11-03 04:53:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-03 04:53:31,195 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.1) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 04:53:31,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:53:31,320 INFO L225 Difference]: With dead ends: 96919 [2021-11-03 04:53:31,320 INFO L226 Difference]: Without dead ends: 83905 [2021-11-03 04:53:31,337 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 04:53:31,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83905 states. [2021-11-03 04:53:34,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83905 to 34519. [2021-11-03 04:53:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34519 states, 34514 states have (on average 1.8600278147997913) internal successors, (64197), 34518 states have internal predecessors, (64197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:34,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34519 states to 34519 states and 64197 transitions. [2021-11-03 04:53:34,602 INFO L78 Accepts]: Start accepts. Automaton has 34519 states and 64197 transitions. Word has length 85 [2021-11-03 04:53:34,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:53:34,603 INFO L470 AbstractCegarLoop]: Abstraction has 34519 states and 64197 transitions. [2021-11-03 04:53:34,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.1) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:34,603 INFO L276 IsEmpty]: Start isEmpty. Operand 34519 states and 64197 transitions. [2021-11-03 04:53:34,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 04:53:34,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:53:34,605 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:53:34,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:53:34,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:34,806 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:53:34,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:34,807 INFO L85 PathProgramCache]: Analyzing trace with hash 733481060, now seen corresponding path program 1 times [2021-11-03 04:53:34,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:34,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548541904] [2021-11-03 04:53:34,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:34,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:34,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:34,812 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:34,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:53:36,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:36,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:53:36,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:53:36,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:53:36,549 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:36,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548541904] [2021-11-03 04:53:36,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548541904] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:36,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:36,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:53:36,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728423086] [2021-11-03 04:53:36,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:53:36,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:36,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:53:36,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:53:36,550 INFO L87 Difference]: Start difference. First operand 34519 states and 64197 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:53:49,998 INFO L93 Difference]: Finished difference Result 173681 states and 319950 transitions. [2021-11-03 04:53:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:53:50,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-03 04:53:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:53:50,452 INFO L225 Difference]: With dead ends: 173681 [2021-11-03 04:53:50,452 INFO L226 Difference]: Without dead ends: 142384 [2021-11-03 04:53:50,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:53:50,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142384 states. [2021-11-03 04:53:55,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142384 to 39973. [2021-11-03 04:53:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39973 states, 39968 states have (on average 1.8215072057646118) internal successors, (72802), 39972 states have internal predecessors, (72802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39973 states to 39973 states and 72802 transitions. [2021-11-03 04:53:55,524 INFO L78 Accepts]: Start accepts. Automaton has 39973 states and 72802 transitions. Word has length 86 [2021-11-03 04:53:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:53:55,525 INFO L470 AbstractCegarLoop]: Abstraction has 39973 states and 72802 transitions. [2021-11-03 04:53:55,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 39973 states and 72802 transitions. [2021-11-03 04:53:55,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 04:53:55,527 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:53:55,527 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:53:55,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:53:55,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:55,728 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:53:55,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1008240674, now seen corresponding path program 1 times [2021-11-03 04:53:55,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:55,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055515227] [2021-11-03 04:53:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:55,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:55,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:55,731 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:55,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545fcd7c-e830-4da5-84cc-20b2dea34371/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 04:53:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:56,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:53:56,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:53:57,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:53:57,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:57,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055515227] [2021-11-03 04:53:57,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055515227] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:57,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:57,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:53:57,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856011107] [2021-11-03 04:53:57,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:53:57,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:57,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:53:57,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:53:57,469 INFO L87 Difference]: Start difference. First operand 39973 states and 72802 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:00,616 INFO L93 Difference]: Finished difference Result 72789 states and 133390 transitions. [2021-11-03 04:54:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:54:00,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-03 04:54:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:00,665 INFO L225 Difference]: With dead ends: 72789 [2021-11-03 04:54:00,665 INFO L226 Difference]: Without dead ends: 36039 [2021-11-03 04:54:00,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:54:00,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36039 states.