./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec8_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8 --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 614dee6ac528b2b5bcd12e57f515dcc43213e2cedeb5bd1e2531b305b02c78fa --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:09:01,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:09:01,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:09:01,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:09:01,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:09:01,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:09:01,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:09:01,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:09:01,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:09:01,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:09:01,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:09:01,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:09:01,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:09:01,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:09:01,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:09:01,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:09:01,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:09:01,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:09:01,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:09:01,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:09:01,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:09:01,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:09:01,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:09:01,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:09:01,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:09:01,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:09:01,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:09:01,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:09:01,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:09:01,394 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:09:01,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:09:01,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:09:01,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:09:01,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:09:01,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:09:01,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:09:01,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:09:01,408 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:09:01,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:09:01,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:09:01,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:09:01,412 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:09:01,465 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:09:01,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:09:01,468 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:09:01,468 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:09:01,468 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:09:01,469 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:09:01,469 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:09:01,469 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:09:01,477 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:09:01,477 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:09:01,478 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:09:01,479 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:09:01,479 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:09:01,480 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:09:01,480 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:09:01,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:09:01,482 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:09:01,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:09:01,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:09:01,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:09:01,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:09:01,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:09:01,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:09:01,484 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:09:01,484 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:09:01,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:09:01,485 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:09:01,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:09:01,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:09:01,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:09:01,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:09:01,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:09:01,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:09:01,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:09:01,490 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:09:01,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:09:01,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:09:01,491 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:09:01,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:09:01,491 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_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 614dee6ac528b2b5bcd12e57f515dcc43213e2cedeb5bd1e2531b305b02c78fa [2021-11-07 01:09:01,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:09:01,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:09:01,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:09:01,859 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:09:01,860 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:09:01,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product32.cil.c [2021-11-07 01:09:01,972 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/data/7eb01d1af/733844e807b2457ab5f2d0e976fa4484/FLAG5aec0d8d7 [2021-11-07 01:09:02,722 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:09:02,723 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/sv-benchmarks/c/product-lines/email_spec8_product32.cil.c [2021-11-07 01:09:02,752 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/data/7eb01d1af/733844e807b2457ab5f2d0e976fa4484/FLAG5aec0d8d7 [2021-11-07 01:09:02,940 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/data/7eb01d1af/733844e807b2457ab5f2d0e976fa4484 [2021-11-07 01:09:02,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:09:02,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:09:02,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:02,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:09:02,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:09:02,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:02" (1/1) ... [2021-11-07 01:09:02,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14b12fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:02, skipping insertion in model container [2021-11-07 01:09:02,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:02" (1/1) ... [2021-11-07 01:09:02,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:09:03,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:09:03,455 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_53d8cedc-f6c0-4716-b738-8e84fe0bf504/sv-benchmarks/c/product-lines/email_spec8_product32.cil.c[37064,37077] [2021-11-07 01:09:03,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:03,706 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) [2021-11-07 01:09:03,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4ad52213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:03, skipping insertion in model container [2021-11-07 01:09:03,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:03,708 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:09:03,711 INFO L168 Benchmark]: Toolchain (without parser) took 764.44 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 57.7 MB in the beginning and 79.4 MB in the end (delta: -21.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:09:03,713 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 94.4 MB. Free memory is still 49.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:09:03,715 INFO L168 Benchmark]: CACSL2BoogieTranslator took 761.53 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 57.5 MB in the beginning and 79.4 MB in the end (delta: -21.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:09:03,718 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 94.4 MB. Free memory is still 49.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 761.53 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 57.5 MB in the beginning and 79.4 MB in the end (delta: -21.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1157]: 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_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8 --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 614dee6ac528b2b5bcd12e57f515dcc43213e2cedeb5bd1e2531b305b02c78fa --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:09:06,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:09:06,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:09:06,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:09:06,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:09:06,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:09:06,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:09:06,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:09:06,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:09:06,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:09:06,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:09:06,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:09:06,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:09:06,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:09:06,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:09:06,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:09:06,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:09:06,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:09:06,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:09:06,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:09:06,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:09:06,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:09:06,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:09:06,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:09:06,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:09:06,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:09:06,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:09:06,157 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:09:06,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:09:06,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:09:06,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:09:06,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:09:06,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:09:06,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:09:06,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:09:06,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:09:06,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:09:06,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:09:06,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:09:06,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:09:06,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:09:06,172 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:09:06,223 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:09:06,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:09:06,225 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:09:06,226 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:09:06,226 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:09:06,226 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:09:06,226 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:09:06,227 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:09:06,227 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:09:06,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:09:06,230 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:09:06,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:09:06,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:09:06,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:09:06,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:09:06,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:09:06,232 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:09:06,232 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:09:06,232 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:09:06,233 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:09:06,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:09:06,233 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:09:06,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:09:06,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:09:06,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:09:06,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:09:06,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:09:06,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:09:06,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:09:06,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:09:06,236 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:09:06,236 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:09:06,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:09:06,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:09:06,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:09:06,237 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_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 614dee6ac528b2b5bcd12e57f515dcc43213e2cedeb5bd1e2531b305b02c78fa [2021-11-07 01:09:06,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:09:06,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:09:06,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:09:06,678 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:09:06,679 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:09:06,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product32.cil.c [2021-11-07 01:09:06,768 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/data/18ddc763b/bb54e58e8bf44872b580f6770c670abb/FLAG5ebe0b3b3 [2021-11-07 01:09:07,625 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:09:07,625 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/sv-benchmarks/c/product-lines/email_spec8_product32.cil.c [2021-11-07 01:09:07,650 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/data/18ddc763b/bb54e58e8bf44872b580f6770c670abb/FLAG5ebe0b3b3 [2021-11-07 01:09:07,663 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/data/18ddc763b/bb54e58e8bf44872b580f6770c670abb [2021-11-07 01:09:07,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:09:07,667 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:09:07,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:07,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:09:07,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:09:07,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:07" (1/1) ... [2021-11-07 01:09:07,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55c67bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:07, skipping insertion in model container [2021-11-07 01:09:07,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:07" (1/1) ... [2021-11-07 01:09:07,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:09:07,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:09:08,254 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_53d8cedc-f6c0-4716-b738-8e84fe0bf504/sv-benchmarks/c/product-lines/email_spec8_product32.cil.c[37064,37077] [2021-11-07 01:09:08,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:08,492 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:09:08,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:09:08,587 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_53d8cedc-f6c0-4716-b738-8e84fe0bf504/sv-benchmarks/c/product-lines/email_spec8_product32.cil.c[37064,37077] [2021-11-07 01:09:08,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:08,724 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:09:08,823 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_53d8cedc-f6c0-4716-b738-8e84fe0bf504/sv-benchmarks/c/product-lines/email_spec8_product32.cil.c[37064,37077] [2021-11-07 01:09:08,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:08,918 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:09:08,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:08 WrapperNode [2021-11-07 01:09:08,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:08,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:09:08,921 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:09:08,921 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:09:08,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:08" (1/1) ... [2021-11-07 01:09:08,998 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:08" (1/1) ... [2021-11-07 01:09:09,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:09:09,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:09:09,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:09:09,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:09:09,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:08" (1/1) ... [2021-11-07 01:09:09,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:08" (1/1) ... [2021-11-07 01:09:09,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:08" (1/1) ... [2021-11-07 01:09:09,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:08" (1/1) ... [2021-11-07 01:09:09,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:08" (1/1) ... [2021-11-07 01:09:09,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:08" (1/1) ... [2021-11-07 01:09:09,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:08" (1/1) ... [2021-11-07 01:09:09,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:09:09,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:09:09,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:09:09,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:09:09,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:08" (1/1) ... [2021-11-07 01:09:09,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:09:09,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:09:09,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:09:09,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:09:09,404 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:09:09,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:09:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:09:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:09:09,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:09:15,406 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:09:15,407 INFO L299 CfgBuilder]: Removed 693 assume(true) statements. [2021-11-07 01:09:15,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:09:15 BoogieIcfgContainer [2021-11-07 01:09:15,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:09:15,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:09:15,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:09:15,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:09:15,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:09:07" (1/3) ... [2021-11-07 01:09:15,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd2983b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:09:15, skipping insertion in model container [2021-11-07 01:09:15,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:08" (2/3) ... [2021-11-07 01:09:15,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd2983b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:09:15, skipping insertion in model container [2021-11-07 01:09:15,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:09:15" (3/3) ... [2021-11-07 01:09:15,420 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec8_product32.cil.c [2021-11-07 01:09:15,425 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:09:15,426 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:09:15,484 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:09:15,490 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 [2021-11-07 01:09:15,490 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:09:15,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 1080 states, 1073 states have (on average 1.7520969245107176) internal successors, (1880), 1079 states have internal predecessors, (1880), 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) [2021-11-07 01:09:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:09:15,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:15,552 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] [2021-11-07 01:09:15,553 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:15,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:15,558 INFO L85 PathProgramCache]: Analyzing trace with hash -710705232, now seen corresponding path program 1 times [2021-11-07 01:09:15,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:15,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374727848] [2021-11-07 01:09:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:15,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:15,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:15,578 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:15,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:09:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:16,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:09:16,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:16,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:16,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:16,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374727848] [2021-11-07 01:09:16,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374727848] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:16,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:16,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:09:16,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767999639] [2021-11-07 01:09:16,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:09:16,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:16,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:09:16,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:09:16,496 INFO L87 Difference]: Start difference. First operand has 1080 states, 1073 states have (on average 1.7520969245107176) internal successors, (1880), 1079 states have internal predecessors, (1880), 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 24.0) internal successors, (48), 2 states have internal predecessors, (48), 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) [2021-11-07 01:09:16,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:16,611 INFO L93 Difference]: Finished difference Result 1875 states and 3237 transitions. [2021-11-07 01:09:16,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:09:16,613 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 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 48 [2021-11-07 01:09:16,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:16,642 INFO L225 Difference]: With dead ends: 1875 [2021-11-07 01:09:16,642 INFO L226 Difference]: Without dead ends: 920 [2021-11-07 01:09:16,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:09:16,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-11-07 01:09:16,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 920. [2021-11-07 01:09:16,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 914 states have (on average 1.74945295404814) internal successors, (1599), 919 states have internal predecessors, (1599), 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) [2021-11-07 01:09:16,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1599 transitions. [2021-11-07 01:09:16,790 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1599 transitions. Word has length 48 [2021-11-07 01:09:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:16,791 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 1599 transitions. [2021-11-07 01:09:16,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 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) [2021-11-07 01:09:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1599 transitions. [2021-11-07 01:09:16,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:09:16,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:16,804 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] [2021-11-07 01:09:16,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:17,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:17,020 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:17,021 INFO L85 PathProgramCache]: Analyzing trace with hash 795804392, now seen corresponding path program 1 times [2021-11-07 01:09:17,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:17,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552271705] [2021-11-07 01:09:17,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:17,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:17,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:17,027 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:17,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:09:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:17,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:09:17,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:17,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:17,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:17,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552271705] [2021-11-07 01:09:17,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552271705] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:17,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:17,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:09:17,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993387837] [2021-11-07 01:09:17,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:17,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:17,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:17,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:17,884 INFO L87 Difference]: Start difference. First operand 920 states and 1599 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) [2021-11-07 01:09:18,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:18,039 INFO L93 Difference]: Finished difference Result 2730 states and 4749 transitions. [2021-11-07 01:09:18,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:09:18,040 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 [2021-11-07 01:09:18,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:18,054 INFO L225 Difference]: With dead ends: 2730 [2021-11-07 01:09:18,054 INFO L226 Difference]: Without dead ends: 1825 [2021-11-07 01:09:18,056 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 [2021-11-07 01:09:18,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-11-07 01:09:18,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 919. [2021-11-07 01:09:18,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 913 states have (on average 1.745892661555312) internal successors, (1594), 918 states have internal predecessors, (1594), 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) [2021-11-07 01:09:18,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1594 transitions. [2021-11-07 01:09:18,110 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1594 transitions. Word has length 49 [2021-11-07 01:09:18,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:18,110 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1594 transitions. [2021-11-07 01:09:18,110 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) [2021-11-07 01:09:18,111 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1594 transitions. [2021-11-07 01:09:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:09:18,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:18,113 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] [2021-11-07 01:09:18,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:18,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:18,330 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:18,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:18,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1862687154, now seen corresponding path program 1 times [2021-11-07 01:09:18,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:18,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618854662] [2021-11-07 01:09:18,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:18,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:18,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:18,334 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:18,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:09:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:18,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:09:18,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:19,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:19,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:19,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618854662] [2021-11-07 01:09:19,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618854662] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:19,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:19,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:09:19,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933246190] [2021-11-07 01:09:19,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:19,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:19,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:19,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:19,181 INFO L87 Difference]: Start difference. First operand 919 states and 1594 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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) [2021-11-07 01:09:19,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:19,534 INFO L93 Difference]: Finished difference Result 3593 states and 6238 transitions. [2021-11-07 01:09:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:09:19,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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 51 [2021-11-07 01:09:19,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:19,553 INFO L225 Difference]: With dead ends: 3593 [2021-11-07 01:09:19,553 INFO L226 Difference]: Without dead ends: 2692 [2021-11-07 01:09:19,555 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:09:19,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2021-11-07 01:09:19,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 918. [2021-11-07 01:09:19,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 912 states have (on average 1.743421052631579) internal successors, (1590), 917 states have internal predecessors, (1590), 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) [2021-11-07 01:09:19,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1590 transitions. [2021-11-07 01:09:19,622 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1590 transitions. Word has length 51 [2021-11-07 01:09:19,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:19,623 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 1590 transitions. [2021-11-07 01:09:19,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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) [2021-11-07 01:09:19,623 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1590 transitions. [2021-11-07 01:09:19,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:09:19,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:19,625 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] [2021-11-07 01:09:19,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:19,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:19,840 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:19,840 INFO L85 PathProgramCache]: Analyzing trace with hash 728062433, now seen corresponding path program 1 times [2021-11-07 01:09:19,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:19,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783183998] [2021-11-07 01:09:19,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:19,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:19,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:19,843 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:19,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:09:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:20,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:09:20,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:20,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:20,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:20,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783183998] [2021-11-07 01:09:20,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783183998] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:20,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:20,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:09:20,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540605208] [2021-11-07 01:09:20,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:20,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:20,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:20,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:20,623 INFO L87 Difference]: Start difference. First operand 918 states and 1590 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-11-07 01:09:20,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:20,743 INFO L93 Difference]: Finished difference Result 1833 states and 3177 transitions. [2021-11-07 01:09:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:09:20,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 52 [2021-11-07 01:09:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:20,749 INFO L225 Difference]: With dead ends: 1833 [2021-11-07 01:09:20,750 INFO L226 Difference]: Without dead ends: 923 [2021-11-07 01:09:20,751 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:20,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-11-07 01:09:20,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 918. [2021-11-07 01:09:20,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 912 states have (on average 1.7401315789473684) internal successors, (1587), 917 states have internal predecessors, (1587), 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) [2021-11-07 01:09:20,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1587 transitions. [2021-11-07 01:09:20,824 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1587 transitions. Word has length 52 [2021-11-07 01:09:20,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:20,827 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 1587 transitions. [2021-11-07 01:09:20,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-11-07 01:09:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1587 transitions. [2021-11-07 01:09:20,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:09:20,829 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:20,829 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] [2021-11-07 01:09:20,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:21,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:21,044 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:21,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:21,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1633624374, now seen corresponding path program 1 times [2021-11-07 01:09:21,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:21,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365051088] [2021-11-07 01:09:21,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:21,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:21,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:21,047 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:21,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:09:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:21,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:09:21,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:21,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:21,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:21,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365051088] [2021-11-07 01:09:21,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365051088] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:21,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:21,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:09:21,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459338554] [2021-11-07 01:09:21,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:21,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:21,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:21,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:21,899 INFO L87 Difference]: Start difference. First operand 918 states and 1587 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2021-11-07 01:09:22,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:22,332 INFO L93 Difference]: Finished difference Result 3580 states and 6214 transitions. [2021-11-07 01:09:22,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:09:22,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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 53 [2021-11-07 01:09:22,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:22,350 INFO L225 Difference]: With dead ends: 3580 [2021-11-07 01:09:22,350 INFO L226 Difference]: Without dead ends: 2688 [2021-11-07 01:09:22,355 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:09:22,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-11-07 01:09:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 918. [2021-11-07 01:09:22,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 912 states have (on average 1.736842105263158) internal successors, (1584), 917 states have internal predecessors, (1584), 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) [2021-11-07 01:09:22,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1584 transitions. [2021-11-07 01:09:22,443 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1584 transitions. Word has length 53 [2021-11-07 01:09:22,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:22,444 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 1584 transitions. [2021-11-07 01:09:22,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2021-11-07 01:09:22,445 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1584 transitions. [2021-11-07 01:09:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:09:22,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:22,448 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] [2021-11-07 01:09:22,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:22,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:22,666 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:22,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:22,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2074751537, now seen corresponding path program 1 times [2021-11-07 01:09:22,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:22,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706738925] [2021-11-07 01:09:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:22,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:22,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:22,668 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:22,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:09:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:23,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:23,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:23,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:23,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:23,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706738925] [2021-11-07 01:09:23,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706738925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:23,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:23,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:09:23,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905246820] [2021-11-07 01:09:23,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:23,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:23,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:23,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:23,515 INFO L87 Difference]: Start difference. First operand 918 states and 1584 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 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) [2021-11-07 01:09:23,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:23,677 INFO L93 Difference]: Finished difference Result 2445 states and 4217 transitions. [2021-11-07 01:09:23,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:09:23,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 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 [2021-11-07 01:09:23,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:23,690 INFO L225 Difference]: With dead ends: 2445 [2021-11-07 01:09:23,690 INFO L226 Difference]: Without dead ends: 1810 [2021-11-07 01:09:23,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:23,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-11-07 01:09:23,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1175. [2021-11-07 01:09:23,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1169 states have (on average 1.7596236099230111) internal successors, (2057), 1174 states have internal predecessors, (2057), 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) [2021-11-07 01:09:23,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 2057 transitions. [2021-11-07 01:09:23,786 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 2057 transitions. Word has length 55 [2021-11-07 01:09:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:23,787 INFO L470 AbstractCegarLoop]: Abstraction has 1175 states and 2057 transitions. [2021-11-07 01:09:23,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 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) [2021-11-07 01:09:23,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 2057 transitions. [2021-11-07 01:09:23,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:09:23,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:23,790 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] [2021-11-07 01:09:23,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:24,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:24,006 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:24,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:24,006 INFO L85 PathProgramCache]: Analyzing trace with hash 893266818, now seen corresponding path program 1 times [2021-11-07 01:09:24,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:24,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262489518] [2021-11-07 01:09:24,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:24,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:24,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:24,009 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:24,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:09:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:24,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:24,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:24,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:24,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:24,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262489518] [2021-11-07 01:09:24,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262489518] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:24,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:24,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:09:24,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049351822] [2021-11-07 01:09:24,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:09:24,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:24,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:09:24,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:24,885 INFO L87 Difference]: Start difference. First operand 1175 states and 2057 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-11-07 01:09:25,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:25,039 INFO L93 Difference]: Finished difference Result 3106 states and 5437 transitions. [2021-11-07 01:09:25,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:09:25,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 [2021-11-07 01:09:25,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:25,052 INFO L225 Difference]: With dead ends: 3106 [2021-11-07 01:09:25,053 INFO L226 Difference]: Without dead ends: 2015 [2021-11-07 01:09:25,055 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-11-07 01:09:25,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1380. [2021-11-07 01:09:25,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1374 states have (on average 1.7707423580786026) internal successors, (2433), 1379 states have internal predecessors, (2433), 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) [2021-11-07 01:09:25,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2433 transitions. [2021-11-07 01:09:25,180 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2433 transitions. Word has length 67 [2021-11-07 01:09:25,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:25,182 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 2433 transitions. [2021-11-07 01:09:25,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-11-07 01:09:25,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2433 transitions. [2021-11-07 01:09:25,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:09:25,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:25,188 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] [2021-11-07 01:09:25,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:25,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:25,403 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:25,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:25,404 INFO L85 PathProgramCache]: Analyzing trace with hash -729595935, now seen corresponding path program 1 times [2021-11-07 01:09:25,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:25,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618421572] [2021-11-07 01:09:25,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:25,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:25,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:25,406 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:25,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:09:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:25,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:25,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:26,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:26,199 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:26,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618421572] [2021-11-07 01:09:26,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618421572] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:26,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:26,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:09:26,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374896920] [2021-11-07 01:09:26,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:09:26,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:26,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:09:26,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:26,201 INFO L87 Difference]: Start difference. First operand 1380 states and 2433 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-11-07 01:09:26,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:26,405 INFO L93 Difference]: Finished difference Result 3753 states and 6630 transitions. [2021-11-07 01:09:26,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:09:26,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 [2021-11-07 01:09:26,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:26,421 INFO L225 Difference]: With dead ends: 3753 [2021-11-07 01:09:26,421 INFO L226 Difference]: Without dead ends: 2465 [2021-11-07 01:09:26,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-11-07 01:09:26,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1830. [2021-11-07 01:09:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1824 states have (on average 1.787828947368421) internal successors, (3261), 1829 states have internal predecessors, (3261), 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) [2021-11-07 01:09:26,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 3261 transitions. [2021-11-07 01:09:26,559 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 3261 transitions. Word has length 68 [2021-11-07 01:09:26,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:26,560 INFO L470 AbstractCegarLoop]: Abstraction has 1830 states and 3261 transitions. [2021-11-07 01:09:26,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-11-07 01:09:26,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 3261 transitions. [2021-11-07 01:09:26,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:09:26,563 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:26,564 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] [2021-11-07 01:09:26,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-07 01:09:26,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:26,781 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:26,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:26,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1608061104, now seen corresponding path program 1 times [2021-11-07 01:09:26,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:26,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [942831934] [2021-11-07 01:09:26,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:26,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:26,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:26,783 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:26,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:09:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:27,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:27,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:27,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:27,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:27,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [942831934] [2021-11-07 01:09:27,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [942831934] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:27,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:27,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:09:27,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964357630] [2021-11-07 01:09:27,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:09:27,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:27,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:09:27,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:27,629 INFO L87 Difference]: Start difference. First operand 1830 states and 3261 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2021-11-07 01:09:27,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:27,841 INFO L93 Difference]: Finished difference Result 5083 states and 9083 transitions. [2021-11-07 01:09:27,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:09:27,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 [2021-11-07 01:09:27,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:27,863 INFO L225 Difference]: With dead ends: 5083 [2021-11-07 01:09:27,863 INFO L226 Difference]: Without dead ends: 3353 [2021-11-07 01:09:27,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:27,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3353 states. [2021-11-07 01:09:28,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3353 to 2718. [2021-11-07 01:09:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2718 states, 2712 states have (on average 1.8053097345132743) internal successors, (4896), 2717 states have internal predecessors, (4896), 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) [2021-11-07 01:09:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 4896 transitions. [2021-11-07 01:09:28,089 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 4896 transitions. Word has length 69 [2021-11-07 01:09:28,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:28,090 INFO L470 AbstractCegarLoop]: Abstraction has 2718 states and 4896 transitions. [2021-11-07 01:09:28,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2021-11-07 01:09:28,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 4896 transitions. [2021-11-07 01:09:28,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:09:28,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:28,096 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] [2021-11-07 01:09:28,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:28,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:28,313 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:28,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:28,313 INFO L85 PathProgramCache]: Analyzing trace with hash -898322896, now seen corresponding path program 1 times [2021-11-07 01:09:28,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:28,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341604226] [2021-11-07 01:09:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:28,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:28,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:28,315 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:28,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:09:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:28,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:28,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:29,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:29,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:29,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341604226] [2021-11-07 01:09:29,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341604226] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:29,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:29,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:09:29,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600739438] [2021-11-07 01:09:29,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:09:29,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:29,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:09:29,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:29,161 INFO L87 Difference]: Start difference. First operand 2718 states and 4896 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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) [2021-11-07 01:09:29,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:29,476 INFO L93 Difference]: Finished difference Result 7483 states and 13507 transitions. [2021-11-07 01:09:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:09:29,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 70 [2021-11-07 01:09:29,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:29,510 INFO L225 Difference]: With dead ends: 7483 [2021-11-07 01:09:29,510 INFO L226 Difference]: Without dead ends: 4899 [2021-11-07 01:09:29,515 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:29,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-11-07 01:09:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4264. [2021-11-07 01:09:29,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4264 states, 4258 states have (on average 1.8179896665100987) internal successors, (7741), 4263 states have internal predecessors, (7741), 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) [2021-11-07 01:09:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4264 states to 4264 states and 7741 transitions. [2021-11-07 01:09:29,808 INFO L78 Accepts]: Start accepts. Automaton has 4264 states and 7741 transitions. Word has length 70 [2021-11-07 01:09:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:29,808 INFO L470 AbstractCegarLoop]: Abstraction has 4264 states and 7741 transitions. [2021-11-07 01:09:29,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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) [2021-11-07 01:09:29,809 INFO L276 IsEmpty]: Start isEmpty. Operand 4264 states and 7741 transitions. [2021-11-07 01:09:29,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:09:29,814 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:29,815 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] [2021-11-07 01:09:29,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:30,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:30,032 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:30,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1420927585, now seen corresponding path program 1 times [2021-11-07 01:09:30,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:30,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681467669] [2021-11-07 01:09:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:30,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:30,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:30,034 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:30,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:09:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:30,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:30,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:30,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:30,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:30,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:30,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681467669] [2021-11-07 01:09:30,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681467669] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:30,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:30,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:09:30,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831894304] [2021-11-07 01:09:30,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:09:30,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:30,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:09:30,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:30,936 INFO L87 Difference]: Start difference. First operand 4264 states and 7741 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-11-07 01:09:31,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:31,380 INFO L93 Difference]: Finished difference Result 11837 states and 21525 transitions. [2021-11-07 01:09:31,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:09:31,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 [2021-11-07 01:09:31,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:31,416 INFO L225 Difference]: With dead ends: 11837 [2021-11-07 01:09:31,417 INFO L226 Difference]: Without dead ends: 7741 [2021-11-07 01:09:31,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:31,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7741 states. [2021-11-07 01:09:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7741 to 7106. [2021-11-07 01:09:31,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7106 states, 7100 states have (on average 1.8261971830985915) internal successors, (12966), 7105 states have internal predecessors, (12966), 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) [2021-11-07 01:09:31,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7106 states to 7106 states and 12966 transitions. [2021-11-07 01:09:31,893 INFO L78 Accepts]: Start accepts. Automaton has 7106 states and 12966 transitions. Word has length 71 [2021-11-07 01:09:31,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:31,895 INFO L470 AbstractCegarLoop]: Abstraction has 7106 states and 12966 transitions. [2021-11-07 01:09:31,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-11-07 01:09:31,896 INFO L276 IsEmpty]: Start isEmpty. Operand 7106 states and 12966 transitions. [2021-11-07 01:09:31,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:09:31,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:31,905 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] [2021-11-07 01:09:31,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:32,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:32,125 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:32,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:32,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1766584001, now seen corresponding path program 1 times [2021-11-07 01:09:32,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:32,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960162068] [2021-11-07 01:09:32,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:32,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:32,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:32,128 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:32,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:09:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:32,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:32,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:32,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:33,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:33,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960162068] [2021-11-07 01:09:33,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960162068] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:33,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:33,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:09:33,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760556200] [2021-11-07 01:09:33,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:09:33,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:33,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:09:33,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:33,147 INFO L87 Difference]: Start difference. First operand 7106 states and 12966 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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) [2021-11-07 01:09:33,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:33,681 INFO L93 Difference]: Finished difference Result 20821 states and 38042 transitions. [2021-11-07 01:09:33,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:09:33,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 [2021-11-07 01:09:33,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:33,726 INFO L225 Difference]: With dead ends: 20821 [2021-11-07 01:09:33,726 INFO L226 Difference]: Without dead ends: 13887 [2021-11-07 01:09:33,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:33,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13887 states. [2021-11-07 01:09:34,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13887 to 13252. [2021-11-07 01:09:34,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13252 states, 13246 states have (on average 1.8305148724143137) internal successors, (24247), 13251 states have internal predecessors, (24247), 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) [2021-11-07 01:09:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13252 states to 13252 states and 24247 transitions. [2021-11-07 01:09:34,634 INFO L78 Accepts]: Start accepts. Automaton has 13252 states and 24247 transitions. Word has length 72 [2021-11-07 01:09:34,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:34,635 INFO L470 AbstractCegarLoop]: Abstraction has 13252 states and 24247 transitions. [2021-11-07 01:09:34,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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) [2021-11-07 01:09:34,635 INFO L276 IsEmpty]: Start isEmpty. Operand 13252 states and 24247 transitions. [2021-11-07 01:09:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:09:34,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:34,646 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:34,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:34,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:34,860 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:34,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:34,860 INFO L85 PathProgramCache]: Analyzing trace with hash 579176657, now seen corresponding path program 1 times [2021-11-07 01:09:34,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:34,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281000058] [2021-11-07 01:09:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:34,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:34,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:34,863 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:34,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:09:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:35,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:09:35,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:09:35,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:09:36,008 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:36,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281000058] [2021-11-07 01:09:36,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281000058] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:36,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:36,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:09:36,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767261642] [2021-11-07 01:09:36,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:36,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:36,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:36,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:36,010 INFO L87 Difference]: Start difference. First operand 13252 states and 24247 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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) [2021-11-07 01:09:39,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:39,718 INFO L93 Difference]: Finished difference Result 32925 states and 60232 transitions. [2021-11-07 01:09:39,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:09:39,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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 [2021-11-07 01:09:39,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:39,769 INFO L225 Difference]: With dead ends: 32925 [2021-11-07 01:09:39,769 INFO L226 Difference]: Without dead ends: 19966 [2021-11-07 01:09:39,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:09:39,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19966 states. [2021-11-07 01:09:40,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19966 to 13219. [2021-11-07 01:09:40,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13219 states, 13213 states have (on average 1.8250964958752744) internal successors, (24115), 13218 states have internal predecessors, (24115), 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) [2021-11-07 01:09:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13219 states to 13219 states and 24115 transitions. [2021-11-07 01:09:40,835 INFO L78 Accepts]: Start accepts. Automaton has 13219 states and 24115 transitions. Word has length 73 [2021-11-07 01:09:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:40,835 INFO L470 AbstractCegarLoop]: Abstraction has 13219 states and 24115 transitions. [2021-11-07 01:09:40,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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) [2021-11-07 01:09:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 13219 states and 24115 transitions. [2021-11-07 01:09:40,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:09:40,845 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:40,845 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] [2021-11-07 01:09:40,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:41,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:41,062 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:41,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:41,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1602690608, now seen corresponding path program 1 times [2021-11-07 01:09:41,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:41,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67667696] [2021-11-07 01:09:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:41,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:41,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:41,064 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:41,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:09:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:41,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:41,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:42,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:42,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:42,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67667696] [2021-11-07 01:09:42,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67667696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:42,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:42,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:09:42,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113304323] [2021-11-07 01:09:42,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:09:42,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:42,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:09:42,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:42,208 INFO L87 Difference]: Start difference. First operand 13219 states and 24115 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2021-11-07 01:09:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:43,225 INFO L93 Difference]: Finished difference Result 38864 states and 70972 transitions. [2021-11-07 01:09:43,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:09:43,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 [2021-11-07 01:09:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:43,298 INFO L225 Difference]: With dead ends: 38864 [2021-11-07 01:09:43,298 INFO L226 Difference]: Without dead ends: 25824 [2021-11-07 01:09:43,319 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:43,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25824 states. [2021-11-07 01:09:44,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25824 to 25189. [2021-11-07 01:09:44,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25189 states, 25183 states have (on average 1.8267879124806417) internal successors, (46004), 25188 states have internal predecessors, (46004), 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) [2021-11-07 01:09:45,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25189 states to 25189 states and 46004 transitions. [2021-11-07 01:09:45,004 INFO L78 Accepts]: Start accepts. Automaton has 25189 states and 46004 transitions. Word has length 73 [2021-11-07 01:09:45,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:45,004 INFO L470 AbstractCegarLoop]: Abstraction has 25189 states and 46004 transitions. [2021-11-07 01:09:45,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2021-11-07 01:09:45,004 INFO L276 IsEmpty]: Start isEmpty. Operand 25189 states and 46004 transitions. [2021-11-07 01:09:45,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:09:45,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:45,017 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] [2021-11-07 01:09:45,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:45,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:45,235 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:45,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:45,235 INFO L85 PathProgramCache]: Analyzing trace with hash 158467459, now seen corresponding path program 1 times [2021-11-07 01:09:45,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:45,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784853872] [2021-11-07 01:09:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:45,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:45,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:45,237 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:45,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:09:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:45,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:45,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:46,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:46,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:46,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784853872] [2021-11-07 01:09:46,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784853872] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:46,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:46,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:09:46,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887979660] [2021-11-07 01:09:46,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:09:46,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:46,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:09:46,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:46,365 INFO L87 Difference]: Start difference. First operand 25189 states and 46004 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) 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) [2021-11-07 01:09:48,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:48,358 INFO L93 Difference]: Finished difference Result 69413 states and 126375 transitions. [2021-11-07 01:09:48,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:09:48,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) 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 [2021-11-07 01:09:48,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:48,457 INFO L225 Difference]: With dead ends: 69413 [2021-11-07 01:09:48,457 INFO L226 Difference]: Without dead ends: 44450 [2021-11-07 01:09:48,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:48,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44450 states. [2021-11-07 01:09:50,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44450 to 43815. [2021-11-07 01:09:50,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43815 states, 43809 states have (on average 1.815631491246091) internal successors, (79541), 43814 states have internal predecessors, (79541), 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) [2021-11-07 01:09:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43815 states to 43815 states and 79541 transitions. [2021-11-07 01:09:51,007 INFO L78 Accepts]: Start accepts. Automaton has 43815 states and 79541 transitions. Word has length 74 [2021-11-07 01:09:51,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:51,008 INFO L470 AbstractCegarLoop]: Abstraction has 43815 states and 79541 transitions. [2021-11-07 01:09:51,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) 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) [2021-11-07 01:09:51,008 INFO L276 IsEmpty]: Start isEmpty. Operand 43815 states and 79541 transitions. [2021-11-07 01:09:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:09:51,023 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:51,023 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:51,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:51,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:51,239 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:51,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:51,239 INFO L85 PathProgramCache]: Analyzing trace with hash 267546263, now seen corresponding path program 1 times [2021-11-07 01:09:51,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:51,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856784712] [2021-11-07 01:09:51,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:51,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:51,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:51,241 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:51,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:09:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:51,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:09:51,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:09:52,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:09:52,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:52,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856784712] [2021-11-07 01:09:52,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856784712] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:52,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:52,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:09:52,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19498113] [2021-11-07 01:09:52,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:52,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:52,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:52,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:52,354 INFO L87 Difference]: Start difference. First operand 43815 states and 79541 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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) [2021-11-07 01:09:59,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:59,487 INFO L93 Difference]: Finished difference Result 170540 states and 309486 transitions. [2021-11-07 01:09:59,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:09:59,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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 [2021-11-07 01:09:59,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:59,987 INFO L225 Difference]: With dead ends: 170540 [2021-11-07 01:09:59,987 INFO L226 Difference]: Without dead ends: 127017 [2021-11-07 01:10:00,042 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:10:00,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127017 states. [2021-11-07 01:10:03,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127017 to 43557. [2021-11-07 01:10:03,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43557 states, 43551 states have (on average 1.8026910977933917) internal successors, (78509), 43556 states have internal predecessors, (78509), 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) [2021-11-07 01:10:03,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43557 states to 43557 states and 78509 transitions. [2021-11-07 01:10:03,578 INFO L78 Accepts]: Start accepts. Automaton has 43557 states and 78509 transitions. Word has length 75 [2021-11-07 01:10:03,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:03,578 INFO L470 AbstractCegarLoop]: Abstraction has 43557 states and 78509 transitions. [2021-11-07 01:10:03,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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) [2021-11-07 01:10:03,578 INFO L276 IsEmpty]: Start isEmpty. Operand 43557 states and 78509 transitions. [2021-11-07 01:10:03,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:10:03,589 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:03,590 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:03,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:03,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:03,813 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:03,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:03,814 INFO L85 PathProgramCache]: Analyzing trace with hash 311936053, now seen corresponding path program 1 times [2021-11-07 01:10:03,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:03,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036596311] [2021-11-07 01:10:03,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:03,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:03,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:03,816 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:03,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:10:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:04,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:04,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:04,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:04,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:04,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036596311] [2021-11-07 01:10:04,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036596311] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:04,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:04,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:10:04,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182128911] [2021-11-07 01:10:04,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:04,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:04,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:04,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:04,932 INFO L87 Difference]: Start difference. First operand 43557 states and 78509 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2021-11-07 01:10:06,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:06,953 INFO L93 Difference]: Finished difference Result 87451 states and 157595 transitions. [2021-11-07 01:10:06,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:06,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 [2021-11-07 01:10:06,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:07,154 INFO L225 Difference]: With dead ends: 87451 [2021-11-07 01:10:07,154 INFO L226 Difference]: Without dead ends: 44192 [2021-11-07 01:10:07,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:07,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44192 states. [2021-11-07 01:10:09,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44192 to 43557. [2021-11-07 01:10:09,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43557 states, 43551 states have (on average 1.7997520148791073) internal successors, (78381), 43556 states have internal predecessors, (78381), 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) [2021-11-07 01:10:09,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43557 states to 43557 states and 78381 transitions. [2021-11-07 01:10:09,373 INFO L78 Accepts]: Start accepts. Automaton has 43557 states and 78381 transitions. Word has length 75 [2021-11-07 01:10:09,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:09,373 INFO L470 AbstractCegarLoop]: Abstraction has 43557 states and 78381 transitions. [2021-11-07 01:10:09,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2021-11-07 01:10:09,374 INFO L276 IsEmpty]: Start isEmpty. Operand 43557 states and 78381 transitions. [2021-11-07 01:10:09,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:10:09,386 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:09,386 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] [2021-11-07 01:10:09,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:09,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:09,602 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:09,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:09,602 INFO L85 PathProgramCache]: Analyzing trace with hash 833190434, now seen corresponding path program 1 times [2021-11-07 01:10:09,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:09,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052214341] [2021-11-07 01:10:09,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:09,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:09,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:09,604 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:09,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53d8cedc-f6c0-4716-b738-8e84fe0bf504/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:10:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:10,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:10,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:10,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:10,694 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:10,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052214341] [2021-11-07 01:10:10,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052214341] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:10,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:10,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:10,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419892052] [2021-11-07 01:10:10,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:10,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:10,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:10,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:10,697 INFO L87 Difference]: Start difference. First operand 43557 states and 78381 transitions. Second operand has 3 states, 3 states have (on average 25.0) 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) [2021-11-07 01:10:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:14,064 INFO L93 Difference]: Finished difference Result 122181 states and 219621 transitions. [2021-11-07 01:10:14,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:14,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) 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 [2021-11-07 01:10:14,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:14,223 INFO L225 Difference]: With dead ends: 122181 [2021-11-07 01:10:14,223 INFO L226 Difference]: Without dead ends: 78882 [2021-11-07 01:10:14,262 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:14,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78882 states.