./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec1_product26.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_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/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_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/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_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/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 1c7cb2243c6731bf722079adc6952447a998ab6b938202887231d0b533119871 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:56:56,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:56:56,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:56:57,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:56:57,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:56:57,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:56:57,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:56:57,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:56:57,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:56:57,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:56:57,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:56:57,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:56:57,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:56:57,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:56:57,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:56:57,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:56:57,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:56:57,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:56:57,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:56:57,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:56:57,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:56:57,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:56:57,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:56:57,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:56:57,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:56:57,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:56:57,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:56:57,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:56:57,064 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:56:57,065 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:56:57,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:56:57,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:56:57,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:56:57,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:56:57,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:56:57,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:56:57,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:56:57,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:56:57,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:56:57,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:56:57,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:56:57,075 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:56:57,111 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:56:57,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:56:57,115 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:56:57,115 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:56:57,115 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:56:57,116 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:56:57,116 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:56:57,116 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:56:57,116 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:56:57,116 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:56:57,118 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:56:57,118 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:56:57,118 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:56:57,118 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:56:57,119 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:56:57,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:56:57,120 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:56:57,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:56:57,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:56:57,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:56:57,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:56:57,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:56:57,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:56:57,121 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:56:57,121 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:56:57,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:56:57,122 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:56:57,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:56:57,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:56:57,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:56:57,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:56:57,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:56:57,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:56:57,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:56:57,125 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:56:57,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:56:57,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:56:57,126 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:56:57,126 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:56:57,126 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_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c7cb2243c6731bf722079adc6952447a998ab6b938202887231d0b533119871 [2021-11-07 01:56:57,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:56:57,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:56:57,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:56:57,439 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:56:57,439 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:56:57,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product26.cil.c [2021-11-07 01:56:57,511 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/data/3947ea129/e28972f36f184bb2842a6e112179ebc8/FLAG9f4527d37 [2021-11-07 01:56:58,120 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:56:58,125 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/sv-benchmarks/c/product-lines/email_spec1_product26.cil.c [2021-11-07 01:56:58,163 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/data/3947ea129/e28972f36f184bb2842a6e112179ebc8/FLAG9f4527d37 [2021-11-07 01:56:58,362 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/data/3947ea129/e28972f36f184bb2842a6e112179ebc8 [2021-11-07 01:56:58,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:56:58,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:56:58,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:56:58,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:56:58,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:56:58,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:56:58" (1/1) ... [2021-11-07 01:56:58,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37c50953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:58, skipping insertion in model container [2021-11-07 01:56:58,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:56:58" (1/1) ... [2021-11-07 01:56:58,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:56:58,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:56:58,861 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_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/sv-benchmarks/c/product-lines/email_spec1_product26.cil.c[21785,21798] [2021-11-07 01:56:59,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:56:59,133 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 01:56:59,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@152526da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:59, skipping insertion in model container [2021-11-07 01:56:59,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:56:59,134 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:56:59,137 INFO L168 Benchmark]: Toolchain (without parser) took 769.61 ms. Allocated memory is still 119.5 MB. Free memory was 83.0 MB in the beginning and 80.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:56:59,138 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory is still 44.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:56:59,140 INFO L168 Benchmark]: CACSL2BoogieTranslator took 764.58 ms. Allocated memory is still 119.5 MB. Free memory was 82.7 MB in the beginning and 80.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:56:59,142 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory is still 44.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 764.58 ms. Allocated memory is still 119.5 MB. Free memory was 82.7 MB in the beginning and 80.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2658]: 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_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/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_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/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_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/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 1c7cb2243c6731bf722079adc6952447a998ab6b938202887231d0b533119871 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:57:01,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:57:01,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:57:01,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:57:01,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:57:01,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:57:01,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:57:01,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:57:01,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:57:01,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:57:01,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:57:01,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:57:01,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:57:01,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:57:01,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:57:01,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:57:01,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:57:01,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:57:01,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:57:01,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:57:01,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:57:01,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:57:01,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:57:01,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:57:01,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:57:01,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:57:01,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:57:01,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:57:01,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:57:01,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:57:01,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:57:01,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:57:01,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:57:01,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:57:01,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:57:01,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:57:01,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:57:01,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:57:01,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:57:01,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:57:01,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:57:01,420 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:57:01,465 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:57:01,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:57:01,467 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:57:01,467 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:57:01,467 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:57:01,467 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:57:01,468 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:57:01,468 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:57:01,468 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:57:01,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:57:01,471 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:57:01,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:57:01,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:57:01,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:57:01,471 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:57:01,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:57:01,472 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:57:01,472 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:57:01,472 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:57:01,473 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:57:01,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:57:01,473 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:57:01,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:57:01,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:57:01,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:57:01,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:57:01,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:57:01,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:57:01,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:57:01,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:57:01,475 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:57:01,475 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:01,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:57:01,476 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:57:01,476 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:57:01,476 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_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c7cb2243c6731bf722079adc6952447a998ab6b938202887231d0b533119871 [2021-11-07 01:57:01,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:57:01,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:57:01,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:57:01,957 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:57:01,957 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:57:01,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product26.cil.c [2021-11-07 01:57:02,029 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/data/722090e2f/d58c42cacef844db800375651b32cf82/FLAG2e46cee0f [2021-11-07 01:57:02,723 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:57:02,724 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/sv-benchmarks/c/product-lines/email_spec1_product26.cil.c [2021-11-07 01:57:02,748 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/data/722090e2f/d58c42cacef844db800375651b32cf82/FLAG2e46cee0f [2021-11-07 01:57:02,896 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/data/722090e2f/d58c42cacef844db800375651b32cf82 [2021-11-07 01:57:02,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:57:02,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:57:02,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:57:02,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:57:02,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:57:02,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:57:02" (1/1) ... [2021-11-07 01:57:02,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4480bdbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:02, skipping insertion in model container [2021-11-07 01:57:02,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:57:02" (1/1) ... [2021-11-07 01:57:02,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:57:03,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:57:03,570 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_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/sv-benchmarks/c/product-lines/email_spec1_product26.cil.c[21785,21798] [2021-11-07 01:57:03,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:57:03,754 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:57:03,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:57:03,800 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_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/sv-benchmarks/c/product-lines/email_spec1_product26.cil.c[21785,21798] [2021-11-07 01:57:03,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:57:03,902 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:57:03,969 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_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/sv-benchmarks/c/product-lines/email_spec1_product26.cil.c[21785,21798] [2021-11-07 01:57:04,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:57:04,107 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:57:04,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04 WrapperNode [2021-11-07 01:57:04,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:57:04,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:57:04,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:57:04,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:57:04,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:04,180 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:04,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:57:04,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:57:04,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:57:04,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:57:04,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:04,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:04,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:04,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:04,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:04,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:04,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:04,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:57:04,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:57:04,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:57:04,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:57:04,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (1/1) ... [2021-11-07 01:57:04,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:57:04,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:57:04,620 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:57:04,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:57:04,669 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:57:04,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:57:04,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:57:04,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:57:04,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:57:10,185 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:57:10,185 INFO L299 CfgBuilder]: Removed 713 assume(true) statements. [2021-11-07 01:57:10,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:57:10 BoogieIcfgContainer [2021-11-07 01:57:10,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:57:10,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:57:10,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:57:10,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:57:10,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:57:02" (1/3) ... [2021-11-07 01:57:10,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c86a8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:57:10, skipping insertion in model container [2021-11-07 01:57:10,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:04" (2/3) ... [2021-11-07 01:57:10,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c86a8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:57:10, skipping insertion in model container [2021-11-07 01:57:10,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:57:10" (3/3) ... [2021-11-07 01:57:10,211 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec1_product26.cil.c [2021-11-07 01:57:10,216 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:57:10,231 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:57:10,343 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:57:10,357 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 01:57:10,358 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:57:10,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 1032 states, 1025 states have (on average 1.7336585365853658) internal successors, (1777), 1031 states have internal predecessors, (1777), 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 01:57:10,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:57:10,439 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:10,440 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] [2021-11-07 01:57:10,441 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 01:57:10,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:10,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1291311372, now seen corresponding path program 1 times [2021-11-07 01:57:10,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:10,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637897164] [2021-11-07 01:57:10,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:10,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:10,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:10,465 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:10,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:57:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:10,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:57:10,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:10,999 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 01:57:10,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:11,098 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 01:57:11,099 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:11,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637897164] [2021-11-07 01:57:11,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637897164] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:11,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:11,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:57:11,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372942781] [2021-11-07 01:57:11,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:57:11,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:11,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:57:11,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:57:11,125 INFO L87 Difference]: Start difference. First operand has 1032 states, 1025 states have (on average 1.7336585365853658) internal successors, (1777), 1031 states have internal predecessors, (1777), 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 22.0) internal successors, (44), 2 states have internal predecessors, (44), 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 01:57:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:11,237 INFO L93 Difference]: Finished difference Result 1775 states and 3024 transitions. [2021-11-07 01:57:11,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:57:11,239 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 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 44 [2021-11-07 01:57:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:11,267 INFO L225 Difference]: With dead ends: 1775 [2021-11-07 01:57:11,271 INFO L226 Difference]: Without dead ends: 882 [2021-11-07 01:57:11,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 86 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 01:57:11,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-11-07 01:57:11,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 882. [2021-11-07 01:57:11,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 876 states have (on average 1.735159817351598) internal successors, (1520), 881 states have internal predecessors, (1520), 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 01:57:11,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1520 transitions. [2021-11-07 01:57:11,404 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1520 transitions. Word has length 44 [2021-11-07 01:57:11,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:11,404 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 1520 transitions. [2021-11-07 01:57:11,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 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 01:57:11,405 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1520 transitions. [2021-11-07 01:57:11,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:57:11,417 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:11,417 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:11,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:11,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:11,622 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 01:57:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:11,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1185209055, now seen corresponding path program 1 times [2021-11-07 01:57:11,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:11,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912415067] [2021-11-07 01:57:11,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:11,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:11,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:11,631 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:11,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:57:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:11,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:57:11,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:12,184 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 01:57:12,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:12,329 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 01:57:12,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:12,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912415067] [2021-11-07 01:57:12,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912415067] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:12,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:12,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:57:12,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498120024] [2021-11-07 01:57:12,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:57:12,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:12,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:57:12,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:57:12,339 INFO L87 Difference]: Start difference. First operand 882 states and 1520 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:12,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:12,528 INFO L93 Difference]: Finished difference Result 2616 states and 4512 transitions. [2021-11-07 01:57:12,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:57:12,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:57:12,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:12,546 INFO L225 Difference]: With dead ends: 2616 [2021-11-07 01:57:12,546 INFO L226 Difference]: Without dead ends: 1749 [2021-11-07 01:57:12,549 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 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 01:57:12,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2021-11-07 01:57:12,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 881. [2021-11-07 01:57:12,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 875 states have (on average 1.7314285714285715) internal successors, (1515), 880 states have internal predecessors, (1515), 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 01:57:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1515 transitions. [2021-11-07 01:57:12,617 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1515 transitions. Word has length 45 [2021-11-07 01:57:12,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:12,618 INFO L470 AbstractCegarLoop]: Abstraction has 881 states and 1515 transitions. [2021-11-07 01:57:12,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:12,619 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1515 transitions. [2021-11-07 01:57:12,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:57:12,629 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:12,629 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:12,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:12,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:12,843 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 01:57:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:12,846 INFO L85 PathProgramCache]: Analyzing trace with hash -2010832571, now seen corresponding path program 1 times [2021-11-07 01:57:12,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:12,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375640521] [2021-11-07 01:57:12,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:12,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:12,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:12,849 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:12,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:57:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:13,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:57:13,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:13,411 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 01:57:13,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:13,588 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 01:57:13,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:13,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375640521] [2021-11-07 01:57:13,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375640521] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:13,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:13,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:57:13,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713928276] [2021-11-07 01:57:13,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:57:13,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:13,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:57:13,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:57:13,593 INFO L87 Difference]: Start difference. First operand 881 states and 1515 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 01:57:13,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:13,928 INFO L93 Difference]: Finished difference Result 3441 states and 5922 transitions. [2021-11-07 01:57:13,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:57:13,929 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 01:57:13,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:13,945 INFO L225 Difference]: With dead ends: 3441 [2021-11-07 01:57:13,945 INFO L226 Difference]: Without dead ends: 2578 [2021-11-07 01:57:13,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 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 01:57:13,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-11-07 01:57:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 880. [2021-11-07 01:57:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 874 states have (on average 1.72883295194508) internal successors, (1511), 879 states have internal predecessors, (1511), 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 01:57:14,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1511 transitions. [2021-11-07 01:57:14,030 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1511 transitions. Word has length 47 [2021-11-07 01:57:14,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:14,031 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1511 transitions. [2021-11-07 01:57:14,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 01:57:14,033 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1511 transitions. [2021-11-07 01:57:14,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:57:14,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:14,036 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 01:57:14,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:14,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:14,251 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 01:57:14,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:14,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1372034648, now seen corresponding path program 1 times [2021-11-07 01:57:14,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:14,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59269906] [2021-11-07 01:57:14,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:14,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:14,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:14,255 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:14,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:57:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:14,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:57:14,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:14,834 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 01:57:14,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:14,956 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 01:57:14,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:14,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59269906] [2021-11-07 01:57:14,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59269906] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:14,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:14,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:57:14,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529349352] [2021-11-07 01:57:14,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:57:14,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:14,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:57:14,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:57:14,959 INFO L87 Difference]: Start difference. First operand 880 states and 1511 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 01:57:15,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:15,052 INFO L93 Difference]: Finished difference Result 1757 states and 3019 transitions. [2021-11-07 01:57:15,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:57:15,053 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 48 [2021-11-07 01:57:15,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:15,058 INFO L225 Difference]: With dead ends: 1757 [2021-11-07 01:57:15,059 INFO L226 Difference]: Without dead ends: 885 [2021-11-07 01:57:15,060 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 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 01:57:15,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-11-07 01:57:15,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 880. [2021-11-07 01:57:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 874 states have (on average 1.7254004576659039) internal successors, (1508), 879 states have internal predecessors, (1508), 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 01:57:15,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1508 transitions. [2021-11-07 01:57:15,115 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1508 transitions. Word has length 48 [2021-11-07 01:57:15,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:15,116 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1508 transitions. [2021-11-07 01:57:15,116 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 01:57:15,116 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1508 transitions. [2021-11-07 01:57:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:57:15,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:15,118 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:15,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:15,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:15,332 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 01:57:15,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:15,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1895018451, now seen corresponding path program 1 times [2021-11-07 01:57:15,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:15,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35025860] [2021-11-07 01:57:15,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:15,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:15,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:15,335 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:15,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:57:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:15,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:57:15,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:15,867 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 01:57:15,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:16,003 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 01:57:16,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:16,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35025860] [2021-11-07 01:57:16,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35025860] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:16,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:16,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:57:16,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926656534] [2021-11-07 01:57:16,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:57:16,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:16,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:57:16,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:57:16,007 INFO L87 Difference]: Start difference. First operand 880 states and 1508 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 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 01:57:16,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:16,399 INFO L93 Difference]: Finished difference Result 3428 states and 5898 transitions. [2021-11-07 01:57:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:57:16,400 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 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 49 [2021-11-07 01:57:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:16,416 INFO L225 Difference]: With dead ends: 3428 [2021-11-07 01:57:16,416 INFO L226 Difference]: Without dead ends: 2574 [2021-11-07 01:57:16,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 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 01:57:16,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-11-07 01:57:16,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 880. [2021-11-07 01:57:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 874 states have (on average 1.7219679633867278) internal successors, (1505), 879 states have internal predecessors, (1505), 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 01:57:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1505 transitions. [2021-11-07 01:57:16,512 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1505 transitions. Word has length 49 [2021-11-07 01:57:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:16,512 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1505 transitions. [2021-11-07 01:57:16,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 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 01:57:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1505 transitions. [2021-11-07 01:57:16,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:57:16,514 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:16,515 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 01:57:16,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:16,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:16,729 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 01:57:16,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:16,730 INFO L85 PathProgramCache]: Analyzing trace with hash 677713576, now seen corresponding path program 1 times [2021-11-07 01:57:16,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:16,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563233975] [2021-11-07 01:57:16,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:16,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:16,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:16,732 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:16,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:57:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:17,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:57:17,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:17,258 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 01:57:17,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:17,401 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 01:57:17,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:17,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563233975] [2021-11-07 01:57:17,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563233975] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:17,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:17,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:57:17,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471303306] [2021-11-07 01:57:17,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:57:17,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:17,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:57:17,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:57:17,406 INFO L87 Difference]: Start difference. First operand 880 states and 1505 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 01:57:17,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:17,558 INFO L93 Difference]: Finished difference Result 2327 states and 3973 transitions. [2021-11-07 01:57:17,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:57:17,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 01:57:17,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:17,580 INFO L225 Difference]: With dead ends: 2327 [2021-11-07 01:57:17,581 INFO L226 Difference]: Without dead ends: 1734 [2021-11-07 01:57:17,582 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 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 01:57:17,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-11-07 01:57:17,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1141. [2021-11-07 01:57:17,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1135 states have (on average 1.748898678414097) internal successors, (1985), 1140 states have internal predecessors, (1985), 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 01:57:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1985 transitions. [2021-11-07 01:57:17,678 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1985 transitions. Word has length 51 [2021-11-07 01:57:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:17,678 INFO L470 AbstractCegarLoop]: Abstraction has 1141 states and 1985 transitions. [2021-11-07 01:57:17,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 01:57:17,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1985 transitions. [2021-11-07 01:57:17,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:57:17,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:17,681 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:17,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:17,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:17,899 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 01:57:17,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:17,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1207100761, now seen corresponding path program 1 times [2021-11-07 01:57:17,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:17,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468128164] [2021-11-07 01:57:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:17,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:17,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:17,902 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:17,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:57:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:18,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:57:18,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:18,469 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 01:57:18,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:18,612 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 01:57:18,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:18,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468128164] [2021-11-07 01:57:18,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468128164] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:18,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:18,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:57:18,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669131893] [2021-11-07 01:57:18,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:57:18,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:18,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:57:18,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:57:18,614 INFO L87 Difference]: Start difference. First operand 1141 states and 1985 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 01:57:18,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:18,779 INFO L93 Difference]: Finished difference Result 3000 states and 5214 transitions. [2021-11-07 01:57:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:18,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:57:18,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:18,791 INFO L225 Difference]: With dead ends: 3000 [2021-11-07 01:57:18,791 INFO L226 Difference]: Without dead ends: 1943 [2021-11-07 01:57:18,793 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 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 01:57:18,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2021-11-07 01:57:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1350. [2021-11-07 01:57:18,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1344 states have (on average 1.7619047619047619) internal successors, (2368), 1349 states have internal predecessors, (2368), 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 01:57:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2368 transitions. [2021-11-07 01:57:18,897 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2368 transitions. Word has length 63 [2021-11-07 01:57:18,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:18,897 INFO L470 AbstractCegarLoop]: Abstraction has 1350 states and 2368 transitions. [2021-11-07 01:57:18,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 01:57:18,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2368 transitions. [2021-11-07 01:57:18,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:57:18,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:18,900 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] [2021-11-07 01:57:18,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:19,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:19,115 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 01:57:19,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:19,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1081540920, now seen corresponding path program 1 times [2021-11-07 01:57:19,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:19,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359671857] [2021-11-07 01:57:19,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:19,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:19,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:19,117 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:19,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:57:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:19,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:57:19,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:19,688 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 01:57:19,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:19,847 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 01:57:19,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:19,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359671857] [2021-11-07 01:57:19,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359671857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:19,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:19,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:57:19,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306948329] [2021-11-07 01:57:19,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:57:19,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:19,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:57:19,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:57:19,851 INFO L87 Difference]: Start difference. First operand 1350 states and 2368 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 01:57:20,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:20,024 INFO L93 Difference]: Finished difference Result 3659 states and 6428 transitions. [2021-11-07 01:57:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:20,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-07 01:57:20,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:20,040 INFO L225 Difference]: With dead ends: 3659 [2021-11-07 01:57:20,040 INFO L226 Difference]: Without dead ends: 2401 [2021-11-07 01:57:20,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 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 01:57:20,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2021-11-07 01:57:20,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 1808. [2021-11-07 01:57:20,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1802 states have (on average 1.781354051054384) internal successors, (3210), 1807 states have internal predecessors, (3210), 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 01:57:20,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 3210 transitions. [2021-11-07 01:57:20,183 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 3210 transitions. Word has length 64 [2021-11-07 01:57:20,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:20,183 INFO L470 AbstractCegarLoop]: Abstraction has 1808 states and 3210 transitions. [2021-11-07 01:57:20,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 01:57:20,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 3210 transitions. [2021-11-07 01:57:20,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:57:20,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:20,187 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:20,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:20,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:20,403 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 01:57:20,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1547407751, now seen corresponding path program 1 times [2021-11-07 01:57:20,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:20,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289468547] [2021-11-07 01:57:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:20,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:20,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:20,405 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:20,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:57:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:20,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:57:20,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:21,031 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 01:57:21,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:21,198 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 01:57:21,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:21,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289468547] [2021-11-07 01:57:21,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289468547] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:21,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:21,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:57:21,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275706846] [2021-11-07 01:57:21,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:57:21,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:21,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:57:21,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:57:21,200 INFO L87 Difference]: Start difference. First operand 1808 states and 3210 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 01:57:21,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:21,393 INFO L93 Difference]: Finished difference Result 5013 states and 8923 transitions. [2021-11-07 01:57:21,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:21,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:57:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:21,414 INFO L225 Difference]: With dead ends: 5013 [2021-11-07 01:57:21,414 INFO L226 Difference]: Without dead ends: 3305 [2021-11-07 01:57:21,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 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 01:57:21,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3305 states. [2021-11-07 01:57:21,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3305 to 2712. [2021-11-07 01:57:21,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2706 states have (on average 1.8008130081300813) internal successors, (4873), 2711 states have internal predecessors, (4873), 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 01:57:21,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 4873 transitions. [2021-11-07 01:57:21,599 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 4873 transitions. Word has length 65 [2021-11-07 01:57:21,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:21,599 INFO L470 AbstractCegarLoop]: Abstraction has 2712 states and 4873 transitions. [2021-11-07 01:57:21,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 01:57:21,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 4873 transitions. [2021-11-07 01:57:21,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:57:21,604 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:21,604 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] [2021-11-07 01:57:21,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:21,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:21,823 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 01:57:21,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:21,823 INFO L85 PathProgramCache]: Analyzing trace with hash 339865351, now seen corresponding path program 1 times [2021-11-07 01:57:21,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:21,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771143511] [2021-11-07 01:57:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:21,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:21,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:21,826 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:21,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:57:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:22,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:57:22,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:22,435 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 01:57:22,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:22,594 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:22,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771143511] [2021-11-07 01:57:22,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771143511] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:22,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:22,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:57:22,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992586104] [2021-11-07 01:57:22,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:57:22,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:22,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:57:22,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:57:22,597 INFO L87 Difference]: Start difference. First operand 2712 states and 4873 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 01:57:22,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:22,871 INFO L93 Difference]: Finished difference Result 7461 states and 13431 transitions. [2021-11-07 01:57:22,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:22,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-11-07 01:57:22,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:22,921 INFO L225 Difference]: With dead ends: 7461 [2021-11-07 01:57:22,921 INFO L226 Difference]: Without dead ends: 4883 [2021-11-07 01:57:22,925 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 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 01:57:22,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4883 states. [2021-11-07 01:57:23,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4883 to 4290. [2021-11-07 01:57:23,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4290 states, 4284 states have (on average 1.8146591970121382) internal successors, (7774), 4289 states have internal predecessors, (7774), 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 01:57:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4290 states to 4290 states and 7774 transitions. [2021-11-07 01:57:23,238 INFO L78 Accepts]: Start accepts. Automaton has 4290 states and 7774 transitions. Word has length 66 [2021-11-07 01:57:23,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:23,239 INFO L470 AbstractCegarLoop]: Abstraction has 4290 states and 7774 transitions. [2021-11-07 01:57:23,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 01:57:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 4290 states and 7774 transitions. [2021-11-07 01:57:23,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:57:23,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:23,250 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 01:57:23,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:23,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:23,465 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 01:57:23,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:23,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1748673464, now seen corresponding path program 1 times [2021-11-07 01:57:23,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:23,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775813593] [2021-11-07 01:57:23,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:23,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:23,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:23,468 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:23,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:57:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:23,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:57:23,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:24,116 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 01:57:24,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:24,246 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 01:57:24,246 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:24,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775813593] [2021-11-07 01:57:24,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775813593] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:24,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:24,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:57:24,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939350135] [2021-11-07 01:57:24,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:57:24,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:24,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:57:24,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:57:24,249 INFO L87 Difference]: Start difference. First operand 4290 states and 7774 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 01:57:24,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:24,647 INFO L93 Difference]: Finished difference Result 11911 states and 21617 transitions. [2021-11-07 01:57:24,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:24,648 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 01:57:24,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:24,670 INFO L225 Difference]: With dead ends: 11911 [2021-11-07 01:57:24,671 INFO L226 Difference]: Without dead ends: 7789 [2021-11-07 01:57:24,678 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 01:57:24,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7789 states. [2021-11-07 01:57:25,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7789 to 7196. [2021-11-07 01:57:25,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7196 states, 7190 states have (on average 1.8235048678720445) internal successors, (13111), 7195 states have internal predecessors, (13111), 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 01:57:25,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7196 states to 7196 states and 13111 transitions. [2021-11-07 01:57:25,186 INFO L78 Accepts]: Start accepts. Automaton has 7196 states and 13111 transitions. Word has length 67 [2021-11-07 01:57:25,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:25,188 INFO L470 AbstractCegarLoop]: Abstraction has 7196 states and 13111 transitions. [2021-11-07 01:57:25,189 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 01:57:25,189 INFO L276 IsEmpty]: Start isEmpty. Operand 7196 states and 13111 transitions. [2021-11-07 01:57:25,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:57:25,194 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:25,195 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 01:57:25,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:25,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:25,414 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 01:57:25,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:25,414 INFO L85 PathProgramCache]: Analyzing trace with hash -206954472, now seen corresponding path program 1 times [2021-11-07 01:57:25,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:25,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581469869] [2021-11-07 01:57:25,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:25,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:25,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:25,417 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:25,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:57:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:26,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:57:26,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:26,219 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 01:57:26,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:26,385 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 01:57:26,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:26,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581469869] [2021-11-07 01:57:26,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581469869] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:26,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:26,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:57:26,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861418343] [2021-11-07 01:57:26,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:57:26,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:26,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:57:26,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:57:26,389 INFO L87 Difference]: Start difference. First operand 7196 states and 13111 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 01:57:27,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:27,098 INFO L93 Difference]: Finished difference Result 20955 states and 38239 transitions. [2021-11-07 01:57:27,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:27,099 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 01:57:27,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:27,138 INFO L225 Difference]: With dead ends: 20955 [2021-11-07 01:57:27,139 INFO L226 Difference]: Without dead ends: 13935 [2021-11-07 01:57:27,150 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 01:57:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13935 states. [2021-11-07 01:57:27,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13935 to 13342. [2021-11-07 01:57:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13342 states, 13336 states have (on average 1.8290341931613676) internal successors, (24392), 13341 states have internal predecessors, (24392), 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 01:57:28,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13342 states to 13342 states and 24392 transitions. [2021-11-07 01:57:28,000 INFO L78 Accepts]: Start accepts. Automaton has 13342 states and 24392 transitions. Word has length 68 [2021-11-07 01:57:28,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:28,001 INFO L470 AbstractCegarLoop]: Abstraction has 13342 states and 24392 transitions. [2021-11-07 01:57:28,001 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 01:57:28,001 INFO L276 IsEmpty]: Start isEmpty. Operand 13342 states and 24392 transitions. [2021-11-07 01:57:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:57:28,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:28,009 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] [2021-11-07 01:57:28,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:28,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:28,225 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 01:57:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:28,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1656012104, now seen corresponding path program 1 times [2021-11-07 01:57:28,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:28,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773012168] [2021-11-07 01:57:28,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:28,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:28,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:28,228 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:28,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:57:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:28,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:57:28,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:28,990 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 01:57:28,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:29,259 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 01:57:29,260 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:29,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773012168] [2021-11-07 01:57:29,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773012168] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:29,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:29,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:57:29,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774483284] [2021-11-07 01:57:29,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:57:29,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:29,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:57:29,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:57:29,263 INFO L87 Difference]: Start difference. First operand 13342 states and 24392 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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 01:57:32,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:32,503 INFO L93 Difference]: Finished difference Result 33123 states and 60541 transitions. [2021-11-07 01:57:32,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:57:32,504 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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 01:57:32,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:32,566 INFO L225 Difference]: With dead ends: 33123 [2021-11-07 01:57:32,567 INFO L226 Difference]: Without dead ends: 20078 [2021-11-07 01:57:32,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 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 01:57:32,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20078 states. [2021-11-07 01:57:33,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20078 to 13309. [2021-11-07 01:57:33,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13309 states, 13303 states have (on average 1.8236488010223257) internal successors, (24260), 13308 states have internal predecessors, (24260), 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 01:57:33,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13309 states to 13309 states and 24260 transitions. [2021-11-07 01:57:33,356 INFO L78 Accepts]: Start accepts. Automaton has 13309 states and 24260 transitions. Word has length 69 [2021-11-07 01:57:33,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:33,357 INFO L470 AbstractCegarLoop]: Abstraction has 13309 states and 24260 transitions. [2021-11-07 01:57:33,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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 01:57:33,357 INFO L276 IsEmpty]: Start isEmpty. Operand 13309 states and 24260 transitions. [2021-11-07 01:57:33,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:57:33,365 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:33,365 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 01:57:33,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:33,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:33,580 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 01:57:33,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:33,581 INFO L85 PathProgramCache]: Analyzing trace with hash -2035223897, now seen corresponding path program 1 times [2021-11-07 01:57:33,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:33,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875838814] [2021-11-07 01:57:33,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:33,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:33,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:33,583 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:33,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:57:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:34,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:57:34,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:34,461 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 01:57:34,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:34,651 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 01:57:34,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:34,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875838814] [2021-11-07 01:57:34,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875838814] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:34,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:34,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:57:34,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853217187] [2021-11-07 01:57:34,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:57:34,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:34,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:57:34,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:57:34,653 INFO L87 Difference]: Start difference. First operand 13309 states and 24260 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 01:57:35,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:35,641 INFO L93 Difference]: Finished difference Result 39126 states and 71393 transitions. [2021-11-07 01:57:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:35,642 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 01:57:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:35,731 INFO L225 Difference]: With dead ends: 39126 [2021-11-07 01:57:35,731 INFO L226 Difference]: Without dead ends: 26000 [2021-11-07 01:57:35,752 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 01:57:35,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26000 states. [2021-11-07 01:57:37,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26000 to 25407. [2021-11-07 01:57:37,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25407 states, 25401 states have (on average 1.825636785953309) internal successors, (46373), 25406 states have internal predecessors, (46373), 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 01:57:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25407 states to 25407 states and 46373 transitions. [2021-11-07 01:57:37,215 INFO L78 Accepts]: Start accepts. Automaton has 25407 states and 46373 transitions. Word has length 69 [2021-11-07 01:57:37,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:37,216 INFO L470 AbstractCegarLoop]: Abstraction has 25407 states and 46373 transitions. [2021-11-07 01:57:37,216 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 01:57:37,216 INFO L276 IsEmpty]: Start isEmpty. Operand 25407 states and 46373 transitions. [2021-11-07 01:57:37,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:57:37,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:37,225 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 01:57:37,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:37,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:37,440 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 01:57:37,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:37,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1106421095, now seen corresponding path program 1 times [2021-11-07 01:57:37,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:37,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088111976] [2021-11-07 01:57:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:37,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:37,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:37,442 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:37,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:57:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:38,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:57:38,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:38,206 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 01:57:38,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:38,375 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 01:57:38,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:38,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088111976] [2021-11-07 01:57:38,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088111976] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:38,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:38,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:57:38,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227505406] [2021-11-07 01:57:38,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:57:38,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:38,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:57:38,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:57:38,379 INFO L87 Difference]: Start difference. First operand 25407 states and 46373 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 01:57:40,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:40,293 INFO L93 Difference]: Finished difference Result 70059 states and 127468 transitions. [2021-11-07 01:57:40,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:40,294 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 01:57:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:40,472 INFO L225 Difference]: With dead ends: 70059 [2021-11-07 01:57:40,472 INFO L226 Difference]: Without dead ends: 44882 [2021-11-07 01:57:40,516 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 01:57:40,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44882 states. [2021-11-07 01:57:42,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44882 to 44289. [2021-11-07 01:57:42,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44289 states, 44283 states have (on average 1.8146467041528351) internal successors, (80358), 44288 states have internal predecessors, (80358), 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 01:57:43,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44289 states to 44289 states and 80358 transitions. [2021-11-07 01:57:43,100 INFO L78 Accepts]: Start accepts. Automaton has 44289 states and 80358 transitions. Word has length 70 [2021-11-07 01:57:43,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:43,101 INFO L470 AbstractCegarLoop]: Abstraction has 44289 states and 80358 transitions. [2021-11-07 01:57:43,101 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 01:57:43,101 INFO L276 IsEmpty]: Start isEmpty. Operand 44289 states and 80358 transitions. [2021-11-07 01:57:43,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:57:43,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:43,117 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] [2021-11-07 01:57:43,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:43,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:43,332 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 01:57:43,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:43,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1163359758, now seen corresponding path program 1 times [2021-11-07 01:57:43,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:43,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697214524] [2021-11-07 01:57:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:43,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:43,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:43,335 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:43,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:57:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:43,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:57:43,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:44,204 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 01:57:44,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:44,410 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 01:57:44,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:44,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697214524] [2021-11-07 01:57:44,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697214524] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:44,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:44,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:57:44,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640428548] [2021-11-07 01:57:44,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:57:44,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:44,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:57:44,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:57:44,412 INFO L87 Difference]: Start difference. First operand 44289 states and 80358 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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 01:57:51,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:51,309 INFO L93 Difference]: Finished difference Result 172424 states and 312733 transitions. [2021-11-07 01:57:51,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:57:51,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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 01:57:51,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:51,763 INFO L225 Difference]: With dead ends: 172424 [2021-11-07 01:57:51,763 INFO L226 Difference]: Without dead ends: 128431 [2021-11-07 01:57:51,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 136 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 01:57:51,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128431 states. [2021-11-07 01:57:54,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128431 to 44031. [2021-11-07 01:57:54,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44031 states, 44025 states have (on average 1.801839863713799) internal successors, (79326), 44030 states have internal predecessors, (79326), 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 01:57:54,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44031 states to 44031 states and 79326 transitions. [2021-11-07 01:57:54,720 INFO L78 Accepts]: Start accepts. Automaton has 44031 states and 79326 transitions. Word has length 71 [2021-11-07 01:57:54,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:54,720 INFO L470 AbstractCegarLoop]: Abstraction has 44031 states and 79326 transitions. [2021-11-07 01:57:54,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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 01:57:54,720 INFO L276 IsEmpty]: Start isEmpty. Operand 44031 states and 79326 transitions. [2021-11-07 01:57:54,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:57:54,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:54,729 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] [2021-11-07 01:57:54,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:54,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:54,935 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 01:57:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:54,936 INFO L85 PathProgramCache]: Analyzing trace with hash 835996332, now seen corresponding path program 1 times [2021-11-07 01:57:54,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:54,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137240887] [2021-11-07 01:57:54,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:54,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:54,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:54,938 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:54,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:57:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:55,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:57:55,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:55,756 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 01:57:55,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:55,930 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 01:57:55,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:55,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137240887] [2021-11-07 01:57:55,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137240887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:55,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:55,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:57:55,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936122978] [2021-11-07 01:57:55,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:57:55,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:55,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:57:55,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:57:55,932 INFO L87 Difference]: Start difference. First operand 44031 states and 79326 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 01:57:58,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:58,108 INFO L93 Difference]: Finished difference Result 88353 states and 159136 transitions. [2021-11-07 01:57:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:58,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 01:57:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:58,175 INFO L225 Difference]: With dead ends: 88353 [2021-11-07 01:57:58,175 INFO L226 Difference]: Without dead ends: 44624 [2021-11-07 01:57:58,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 138 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 01:57:58,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44624 states. [2021-11-07 01:58:00,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44624 to 44031. [2021-11-07 01:58:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44031 states, 44025 states have (on average 1.7989324247586598) internal successors, (79198), 44030 states have internal predecessors, (79198), 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 01:58:00,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44031 states to 44031 states and 79198 transitions. [2021-11-07 01:58:00,421 INFO L78 Accepts]: Start accepts. Automaton has 44031 states and 79198 transitions. Word has length 71 [2021-11-07 01:58:00,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:00,422 INFO L470 AbstractCegarLoop]: Abstraction has 44031 states and 79198 transitions. [2021-11-07 01:58:00,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 01:58:00,422 INFO L276 IsEmpty]: Start isEmpty. Operand 44031 states and 79198 transitions. [2021-11-07 01:58:00,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:58:00,427 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:00,428 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 01:58:00,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:00,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:00,631 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 01:58:00,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:00,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1054460519, now seen corresponding path program 1 times [2021-11-07 01:58:00,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:00,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372245083] [2021-11-07 01:58:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:00,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:00,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:00,633 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:00,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c895c8-9713-4a42-bd80-a8f1a34cacb0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:58:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:01,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:01,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:01,473 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 01:58:01,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:01,628 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 01:58:01,628 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:01,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372245083] [2021-11-07 01:58:01,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372245083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:01,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:01,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:58:01,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180693562] [2021-11-07 01:58:01,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:01,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:01,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:01,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:01,632 INFO L87 Difference]: Start difference. First operand 44031 states and 79198 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 01:58:04,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:04,968 INFO L93 Difference]: Finished difference Result 123595 states and 222058 transitions. [2021-11-07 01:58:04,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:04,969 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 01:58:04,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:05,110 INFO L225 Difference]: With dead ends: 123595 [2021-11-07 01:58:05,110 INFO L226 Difference]: Without dead ends: 79826 [2021-11-07 01:58:05,138 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 01:58:05,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79826 states.