./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec3_product30.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_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/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_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/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_67921511-2e6d-4ec3-80af-b6a16c841eda/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 bcbcb0270b2ee5ae38e5dd3a933d2995b5c0488c9590f16a6543c0c656cfb023 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:03:05,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:03:05,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:03:05,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:03:05,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:03:05,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:03:05,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:03:05,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:03:05,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:03:05,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:03:05,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:03:05,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:03:05,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:03:05,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:03:05,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:03:05,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:03:05,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:03:05,097 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:03:05,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:03:05,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:03:05,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:03:05,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:03:05,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:03:05,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:03:05,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:03:05,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:03:05,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:03:05,129 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:03:05,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:03:05,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:03:05,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:03:05,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:03:05,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:03:05,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:03:05,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:03:05,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:03:05,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:03:05,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:03:05,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:03:05,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:03:05,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:03:05,144 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:03:05,190 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:03:05,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:03:05,192 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:03:05,192 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:03:05,192 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:03:05,193 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:03:05,193 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:03:05,193 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:03:05,200 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:03:05,200 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:03:05,202 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:03:05,202 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:03:05,202 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:03:05,203 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:03:05,203 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:03:05,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:03:05,204 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:03:05,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:03:05,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:03:05,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:03:05,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:03:05,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:03:05,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:03:05,206 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:03:05,206 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:03:05,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:03:05,207 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:03:05,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:03:05,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:03:05,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:03:05,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:03:05,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:03:05,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:03:05,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:03:05,211 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:03:05,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:03:05,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:03:05,212 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:03:05,212 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:03:05,213 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_67921511-2e6d-4ec3-80af-b6a16c841eda/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcbcb0270b2ee5ae38e5dd3a933d2995b5c0488c9590f16a6543c0c656cfb023 [2021-11-07 02:03:05,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:03:05,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:03:05,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:03:05,570 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:03:05,570 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:03:05,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product30.cil.c [2021-11-07 02:03:05,652 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/data/3c899bded/2cdad349c3bc4c6fa546a7d672c9ab24/FLAG149ec2313 [2021-11-07 02:03:06,370 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:03:06,370 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/sv-benchmarks/c/product-lines/email_spec3_product30.cil.c [2021-11-07 02:03:06,404 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/data/3c899bded/2cdad349c3bc4c6fa546a7d672c9ab24/FLAG149ec2313 [2021-11-07 02:03:06,593 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/data/3c899bded/2cdad349c3bc4c6fa546a7d672c9ab24 [2021-11-07 02:03:06,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:03:06,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:03:06,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:03:06,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:03:06,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:03:06,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:03:06" (1/1) ... [2021-11-07 02:03:06,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73366384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:06, skipping insertion in model container [2021-11-07 02:03:06,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:03:06" (1/1) ... [2021-11-07 02:03:06,620 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:03:06,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:03:07,067 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_67921511-2e6d-4ec3-80af-b6a16c841eda/sv-benchmarks/c/product-lines/email_spec3_product30.cil.c[5243,5256] [2021-11-07 02:03:07,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:03:07,468 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 02:03:07,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1424e6b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:07, skipping insertion in model container [2021-11-07 02:03:07,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:03:07,469 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:03:07,472 INFO L168 Benchmark]: Toolchain (without parser) took 871.44 ms. Allocated memory was 81.8 MB in the beginning and 113.2 MB in the end (delta: 31.5 MB). Free memory was 40.9 MB in the beginning and 75.9 MB in the end (delta: -35.0 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-11-07 02:03:07,473 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 81.8 MB. Free memory is still 59.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:03:07,476 INFO L168 Benchmark]: CACSL2BoogieTranslator took 865.77 ms. Allocated memory was 81.8 MB in the beginning and 113.2 MB in the end (delta: 31.5 MB). Free memory was 40.7 MB in the beginning and 75.9 MB in the end (delta: -35.2 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:03:07,478 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 81.8 MB. Free memory is still 59.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 865.77 ms. Allocated memory was 81.8 MB in the beginning and 113.2 MB in the end (delta: 31.5 MB). Free memory was 40.7 MB in the beginning and 75.9 MB in the end (delta: -35.2 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 648]: 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_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/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_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/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_67921511-2e6d-4ec3-80af-b6a16c841eda/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 bcbcb0270b2ee5ae38e5dd3a933d2995b5c0488c9590f16a6543c0c656cfb023 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:03:09,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:03:09,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:03:09,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:03:09,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:03:09,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:03:09,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:03:09,851 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:03:09,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:03:09,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:03:09,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:03:09,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:03:09,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:03:09,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:03:09,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:03:09,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:03:09,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:03:09,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:03:09,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:03:09,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:03:09,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:03:09,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:03:09,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:03:09,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:03:09,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:03:09,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:03:09,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:03:09,887 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:03:09,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:03:09,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:03:09,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:03:09,891 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:03:09,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:03:09,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:03:09,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:03:09,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:03:09,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:03:09,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:03:09,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:03:09,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:03:09,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:03:09,907 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:03:09,952 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:03:09,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:03:09,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:03:09,954 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:03:09,955 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:03:09,955 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:03:09,955 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:03:09,955 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:03:09,956 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:03:09,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:03:09,958 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:03:09,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:03:09,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:03:09,959 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:03:09,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:03:09,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:03:09,960 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:03:09,960 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:03:09,960 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:03:09,961 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:03:09,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:03:09,961 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:03:09,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:03:09,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:03:09,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:03:09,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:03:09,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:03:09,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:03:09,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:03:09,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:03:09,963 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:03:09,964 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:03:09,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:03:09,964 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:03:09,965 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:03:09,965 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_67921511-2e6d-4ec3-80af-b6a16c841eda/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcbcb0270b2ee5ae38e5dd3a933d2995b5c0488c9590f16a6543c0c656cfb023 [2021-11-07 02:03:10,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:03:10,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:03:10,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:03:10,472 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:03:10,472 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:03:10,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product30.cil.c [2021-11-07 02:03:10,548 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/data/d1240d0b6/88cd2ca11e3f4f339f34727e973a3038/FLAGfd6f188d8 [2021-11-07 02:03:11,270 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:03:11,275 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/sv-benchmarks/c/product-lines/email_spec3_product30.cil.c [2021-11-07 02:03:11,311 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/data/d1240d0b6/88cd2ca11e3f4f339f34727e973a3038/FLAGfd6f188d8 [2021-11-07 02:03:11,417 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/data/d1240d0b6/88cd2ca11e3f4f339f34727e973a3038 [2021-11-07 02:03:11,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:03:11,421 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:03:11,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:03:11,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:03:11,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:03:11,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:03:11" (1/1) ... [2021-11-07 02:03:11,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1317c670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:11, skipping insertion in model container [2021-11-07 02:03:11,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:03:11" (1/1) ... [2021-11-07 02:03:11,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:03:11,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:03:11,815 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_67921511-2e6d-4ec3-80af-b6a16c841eda/sv-benchmarks/c/product-lines/email_spec3_product30.cil.c[5243,5256] [2021-11-07 02:03:12,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:03:12,298 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:03:12,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:03:12,339 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_67921511-2e6d-4ec3-80af-b6a16c841eda/sv-benchmarks/c/product-lines/email_spec3_product30.cil.c[5243,5256] [2021-11-07 02:03:12,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:03:12,504 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:03:12,538 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_67921511-2e6d-4ec3-80af-b6a16c841eda/sv-benchmarks/c/product-lines/email_spec3_product30.cil.c[5243,5256] [2021-11-07 02:03:12,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:03:12,682 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:03:12,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:12 WrapperNode [2021-11-07 02:03:12,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:03:12,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:03:12,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:03:12,685 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:03:12,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:12" (1/1) ... [2021-11-07 02:03:12,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:12" (1/1) ... [2021-11-07 02:03:12,846 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:03:12,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:03:12,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:03:12,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:03:12,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:12" (1/1) ... [2021-11-07 02:03:12,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:12" (1/1) ... [2021-11-07 02:03:12,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:12" (1/1) ... [2021-11-07 02:03:12,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:12" (1/1) ... [2021-11-07 02:03:12,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:12" (1/1) ... [2021-11-07 02:03:13,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:12" (1/1) ... [2021-11-07 02:03:13,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:12" (1/1) ... [2021-11-07 02:03:13,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:03:13,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:03:13,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:03:13,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:03:13,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:12" (1/1) ... [2021-11-07 02:03:13,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:03:13,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:03:13,077 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:03:13,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:03:13,141 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:03:13,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:03:13,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:03:13,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:03:13,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:03:18,145 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:03:18,146 INFO L299 CfgBuilder]: Removed 339 assume(true) statements. [2021-11-07 02:03:18,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:03:18 BoogieIcfgContainer [2021-11-07 02:03:18,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:03:18,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:03:18,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:03:18,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:03:18,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:03:11" (1/3) ... [2021-11-07 02:03:18,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4797698d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:03:18, skipping insertion in model container [2021-11-07 02:03:18,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:03:12" (2/3) ... [2021-11-07 02:03:18,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4797698d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:03:18, skipping insertion in model container [2021-11-07 02:03:18,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:03:18" (3/3) ... [2021-11-07 02:03:18,158 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec3_product30.cil.c [2021-11-07 02:03:18,164 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:03:18,165 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-07 02:03:18,236 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:03:18,249 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 02:03:18,250 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-07 02:03:18,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 543 states, 538 states have (on average 1.762081784386617) internal successors, (948), 542 states have internal predecessors, (948), 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 02:03:18,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 02:03:18,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:18,316 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:18,317 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:18,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:18,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1854750238, now seen corresponding path program 1 times [2021-11-07 02:03:18,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:18,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390709948] [2021-11-07 02:03:18,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:18,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:18,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:18,345 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:18,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:03:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:18,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:03:18,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:19,248 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 02:03:19,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:19,496 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 02:03:19,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:19,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390709948] [2021-11-07 02:03:19,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390709948] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:19,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:19,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:03:19,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605213909] [2021-11-07 02:03:19,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:03:19,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:19,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:03:19,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:03:19,531 INFO L87 Difference]: Start difference. First operand has 543 states, 538 states have (on average 1.762081784386617) internal successors, (948), 542 states have internal predecessors, (948), 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 28.5) internal successors, (57), 2 states have internal predecessors, (57), 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 02:03:19,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:19,625 INFO L93 Difference]: Finished difference Result 844 states and 1455 transitions. [2021-11-07 02:03:19,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:03:19,626 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 02:03:19,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:19,655 INFO L225 Difference]: With dead ends: 844 [2021-11-07 02:03:19,655 INFO L226 Difference]: Without dead ends: 490 [2021-11-07 02:03:19,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 112 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 02:03:19,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-07 02:03:19,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2021-11-07 02:03:19,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 486 states have (on average 1.7530864197530864) internal successors, (852), 489 states have internal predecessors, (852), 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 02:03:19,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 852 transitions. [2021-11-07 02:03:19,766 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 852 transitions. Word has length 57 [2021-11-07 02:03:19,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:19,766 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 852 transitions. [2021-11-07 02:03:19,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 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 02:03:19,767 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 852 transitions. [2021-11-07 02:03:19,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:03:19,779 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:19,779 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] [2021-11-07 02:03:19,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:20,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:20,000 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:20,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:20,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1976948369, now seen corresponding path program 1 times [2021-11-07 02:03:20,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:20,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198599333] [2021-11-07 02:03:20,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:20,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:20,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:20,009 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:20,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:03:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:20,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:03:20,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:20,591 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 02:03:20,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:20,807 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 02:03:20,808 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:20,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198599333] [2021-11-07 02:03:20,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198599333] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:20,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:20,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:03:20,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217452090] [2021-11-07 02:03:20,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:03:20,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:20,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:03:20,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:20,818 INFO L87 Difference]: Start difference. First operand 490 states and 852 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 02:03:20,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:20,926 INFO L93 Difference]: Finished difference Result 1440 states and 2508 transitions. [2021-11-07 02:03:20,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:03:20,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 58 [2021-11-07 02:03:20,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:20,934 INFO L225 Difference]: With dead ends: 1440 [2021-11-07 02:03:20,935 INFO L226 Difference]: Without dead ends: 965 [2021-11-07 02:03:20,938 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 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 02:03:20,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-11-07 02:03:20,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 489. [2021-11-07 02:03:21,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 485 states have (on average 1.7463917525773196) internal successors, (847), 488 states have internal predecessors, (847), 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 02:03:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 847 transitions. [2021-11-07 02:03:21,025 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 847 transitions. Word has length 58 [2021-11-07 02:03:21,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:21,026 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 847 transitions. [2021-11-07 02:03:21,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 02:03:21,026 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 847 transitions. [2021-11-07 02:03:21,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:03:21,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:21,028 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] [2021-11-07 02:03:21,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:21,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:21,229 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:21,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:21,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1205183979, now seen corresponding path program 1 times [2021-11-07 02:03:21,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:21,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631253353] [2021-11-07 02:03:21,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:21,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:21,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:21,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:21,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:03:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:21,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:03:21,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:21,847 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 02:03:21,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:22,063 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 02:03:22,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:22,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631253353] [2021-11-07 02:03:22,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631253353] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:22,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:22,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:03:22,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505766662] [2021-11-07 02:03:22,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:03:22,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:22,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:03:22,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:03:22,068 INFO L87 Difference]: Start difference. First operand 489 states and 847 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 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 02:03:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:22,318 INFO L93 Difference]: Finished difference Result 1873 states and 3250 transitions. [2021-11-07 02:03:22,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:03:22,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 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 60 [2021-11-07 02:03:22,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:22,328 INFO L225 Difference]: With dead ends: 1873 [2021-11-07 02:03:22,329 INFO L226 Difference]: Without dead ends: 1402 [2021-11-07 02:03:22,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 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 02:03:22,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-11-07 02:03:22,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 488. [2021-11-07 02:03:22,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 484 states have (on average 1.7417355371900827) internal successors, (843), 487 states have internal predecessors, (843), 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 02:03:22,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 843 transitions. [2021-11-07 02:03:22,370 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 843 transitions. Word has length 60 [2021-11-07 02:03:22,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:22,371 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 843 transitions. [2021-11-07 02:03:22,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 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 02:03:22,371 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 843 transitions. [2021-11-07 02:03:22,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:03:22,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:22,373 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:22,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:22,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:22,588 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:22,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:22,592 INFO L85 PathProgramCache]: Analyzing trace with hash -703641672, now seen corresponding path program 1 times [2021-11-07 02:03:22,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:22,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550170213] [2021-11-07 02:03:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:22,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:22,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:22,595 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:22,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:03:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:23,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:03:23,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:23,200 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 02:03:23,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:23,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:23,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550170213] [2021-11-07 02:03:23,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550170213] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:23,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:23,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:03:23,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97097603] [2021-11-07 02:03:23,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:03:23,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:23,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:03:23,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:23,357 INFO L87 Difference]: Start difference. First operand 488 states and 843 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 02:03:23,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:23,434 INFO L93 Difference]: Finished difference Result 973 states and 1683 transitions. [2021-11-07 02:03:23,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:03:23,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 61 [2021-11-07 02:03:23,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:23,438 INFO L225 Difference]: With dead ends: 973 [2021-11-07 02:03:23,439 INFO L226 Difference]: Without dead ends: 493 [2021-11-07 02:03:23,440 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 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 02:03:23,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-11-07 02:03:23,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 488. [2021-11-07 02:03:23,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 484 states have (on average 1.7355371900826446) internal successors, (840), 487 states have internal predecessors, (840), 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 02:03:23,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 840 transitions. [2021-11-07 02:03:23,473 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 840 transitions. Word has length 61 [2021-11-07 02:03:23,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:23,474 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 840 transitions. [2021-11-07 02:03:23,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 02:03:23,474 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 840 transitions. [2021-11-07 02:03:23,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 02:03:23,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:23,476 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] [2021-11-07 02:03:23,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:23,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:23,695 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:23,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:23,696 INFO L85 PathProgramCache]: Analyzing trace with hash 2072506371, now seen corresponding path program 1 times [2021-11-07 02:03:23,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:23,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907144576] [2021-11-07 02:03:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:23,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:23,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:23,698 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:23,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:03:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:24,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:03:24,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:24,324 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 02:03:24,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:24,511 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 02:03:24,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:24,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907144576] [2021-11-07 02:03:24,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907144576] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:24,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:24,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:03:24,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728040540] [2021-11-07 02:03:24,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:03:24,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:24,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:03:24,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:03:24,514 INFO L87 Difference]: Start difference. First operand 488 states and 840 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 02:03:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:24,759 INFO L93 Difference]: Finished difference Result 1860 states and 3226 transitions. [2021-11-07 02:03:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:03:24,760 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 62 [2021-11-07 02:03:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:24,769 INFO L225 Difference]: With dead ends: 1860 [2021-11-07 02:03:24,770 INFO L226 Difference]: Without dead ends: 1398 [2021-11-07 02:03:24,774 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 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 02:03:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2021-11-07 02:03:24,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 488. [2021-11-07 02:03:24,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 484 states have (on average 1.7293388429752066) internal successors, (837), 487 states have internal predecessors, (837), 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 02:03:24,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 837 transitions. [2021-11-07 02:03:24,844 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 837 transitions. Word has length 62 [2021-11-07 02:03:24,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:24,845 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 837 transitions. [2021-11-07 02:03:24,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 02:03:24,845 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 837 transitions. [2021-11-07 02:03:24,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:03:24,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:24,847 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 02:03:24,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:25,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:25,065 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:25,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:25,066 INFO L85 PathProgramCache]: Analyzing trace with hash -525285016, now seen corresponding path program 1 times [2021-11-07 02:03:25,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:25,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294743803] [2021-11-07 02:03:25,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:25,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:25,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:25,068 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:25,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:03:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:25,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:25,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:25,700 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 02:03:25,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:25,847 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 02:03:25,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:25,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294743803] [2021-11-07 02:03:25,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294743803] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:25,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:25,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:03:25,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308934152] [2021-11-07 02:03:25,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:03:25,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:25,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:03:25,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:25,850 INFO L87 Difference]: Start difference. First operand 488 states and 837 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 02:03:25,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:25,943 INFO L93 Difference]: Finished difference Result 1198 states and 2058 transitions. [2021-11-07 02:03:25,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:03:25,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 64 [2021-11-07 02:03:25,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:25,950 INFO L225 Difference]: With dead ends: 1198 [2021-11-07 02:03:25,951 INFO L226 Difference]: Without dead ends: 950 [2021-11-07 02:03:25,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 124 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 02:03:25,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-11-07 02:03:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 702. [2021-11-07 02:03:26,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 698 states have (on average 1.7593123209169055) internal successors, (1228), 701 states have internal predecessors, (1228), 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 02:03:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1228 transitions. [2021-11-07 02:03:26,017 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1228 transitions. Word has length 64 [2021-11-07 02:03:26,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:26,018 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 1228 transitions. [2021-11-07 02:03:26,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 02:03:26,018 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1228 transitions. [2021-11-07 02:03:26,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:03:26,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:26,020 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:26,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:26,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:26,236 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:26,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:26,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1140882679, now seen corresponding path program 1 times [2021-11-07 02:03:26,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:26,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941450319] [2021-11-07 02:03:26,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:26,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:26,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:26,239 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:26,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:03:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:26,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:26,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:26,935 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 02:03:26,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:27,127 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 02:03:27,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:27,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941450319] [2021-11-07 02:03:27,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941450319] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:27,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:27,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:27,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396378300] [2021-11-07 02:03:27,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:27,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:27,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:27,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:27,130 INFO L87 Difference]: Start difference. First operand 702 states and 1228 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 02:03:27,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:27,243 INFO L93 Difference]: Finished difference Result 1730 states and 3032 transitions. [2021-11-07 02:03:27,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:27,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 76 [2021-11-07 02:03:27,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:27,251 INFO L225 Difference]: With dead ends: 1730 [2021-11-07 02:03:27,252 INFO L226 Difference]: Without dead ends: 1112 [2021-11-07 02:03:27,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 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 02:03:27,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-11-07 02:03:27,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 864. [2021-11-07 02:03:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 860 states have (on average 1.7697674418604652) internal successors, (1522), 863 states have internal predecessors, (1522), 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 02:03:27,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1522 transitions. [2021-11-07 02:03:27,329 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1522 transitions. Word has length 76 [2021-11-07 02:03:27,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:27,329 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 1522 transitions. [2021-11-07 02:03:27,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 02:03:27,330 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1522 transitions. [2021-11-07 02:03:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:03:27,332 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:27,332 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:27,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:27,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:27,550 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:27,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:27,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1718805368, now seen corresponding path program 1 times [2021-11-07 02:03:27,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:27,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751599725] [2021-11-07 02:03:27,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:27,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:27,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:27,559 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:27,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:03:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:28,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:28,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:28,300 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 02:03:28,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:28,520 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 02:03:28,521 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:28,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751599725] [2021-11-07 02:03:28,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751599725] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:28,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:28,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:28,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880540497] [2021-11-07 02:03:28,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:28,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:28,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:28,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:28,523 INFO L87 Difference]: Start difference. First operand 864 states and 1522 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 02:03:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:28,642 INFO L93 Difference]: Finished difference Result 2248 states and 3979 transitions. [2021-11-07 02:03:28,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:28,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 02:03:28,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:28,652 INFO L225 Difference]: With dead ends: 2248 [2021-11-07 02:03:28,653 INFO L226 Difference]: Without dead ends: 1476 [2021-11-07 02:03:28,656 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 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 02:03:28,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2021-11-07 02:03:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1228. [2021-11-07 02:03:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1224 states have (on average 1.7859477124183007) internal successors, (2186), 1227 states have internal predecessors, (2186), 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 02:03:28,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 2186 transitions. [2021-11-07 02:03:28,766 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 2186 transitions. Word has length 77 [2021-11-07 02:03:28,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:28,767 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 2186 transitions. [2021-11-07 02:03:28,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 02:03:28,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 2186 transitions. [2021-11-07 02:03:28,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:03:28,770 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:28,770 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:28,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:28,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:28,986 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:28,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:28,987 INFO L85 PathProgramCache]: Analyzing trace with hash -32928887, now seen corresponding path program 1 times [2021-11-07 02:03:28,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:28,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97568386] [2021-11-07 02:03:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:28,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:28,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:28,989 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:28,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:03:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:29,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:29,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:29,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:29,869 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 02:03:29,869 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:29,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97568386] [2021-11-07 02:03:29,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97568386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:29,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:29,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:29,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346544684] [2021-11-07 02:03:29,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:29,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:29,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:29,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:29,872 INFO L87 Difference]: Start difference. First operand 1228 states and 2186 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 02:03:30,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:30,064 INFO L93 Difference]: Finished difference Result 3320 states and 5940 transitions. [2021-11-07 02:03:30,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:30,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 78 [2021-11-07 02:03:30,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:30,080 INFO L225 Difference]: With dead ends: 3320 [2021-11-07 02:03:30,080 INFO L226 Difference]: Without dead ends: 2192 [2021-11-07 02:03:30,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 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 02:03:30,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-11-07 02:03:30,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1944. [2021-11-07 02:03:30,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1940 states have (on average 1.8005154639175258) internal successors, (3493), 1943 states have internal predecessors, (3493), 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 02:03:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 3493 transitions. [2021-11-07 02:03:30,246 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 3493 transitions. Word has length 78 [2021-11-07 02:03:30,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:30,247 INFO L470 AbstractCegarLoop]: Abstraction has 1944 states and 3493 transitions. [2021-11-07 02:03:30,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 02:03:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 3493 transitions. [2021-11-07 02:03:30,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 02:03:30,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:30,252 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:30,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:30,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:30,467 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:30,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:30,468 INFO L85 PathProgramCache]: Analyzing trace with hash -2132337143, now seen corresponding path program 1 times [2021-11-07 02:03:30,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:30,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053324310] [2021-11-07 02:03:30,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:30,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:30,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:30,471 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:30,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:03:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:31,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:31,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:31,230 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 02:03:31,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:31,432 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 02:03:31,432 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:31,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053324310] [2021-11-07 02:03:31,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053324310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:31,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:31,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:31,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26460600] [2021-11-07 02:03:31,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:31,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:31,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:31,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:31,434 INFO L87 Difference]: Start difference. First operand 1944 states and 3493 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:31,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:31,659 INFO L93 Difference]: Finished difference Result 5204 states and 9380 transitions. [2021-11-07 02:03:31,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:31,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 02:03:31,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:31,687 INFO L225 Difference]: With dead ends: 5204 [2021-11-07 02:03:31,687 INFO L226 Difference]: Without dead ends: 3394 [2021-11-07 02:03:31,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 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 02:03:31,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3394 states. [2021-11-07 02:03:31,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3394 to 3146. [2021-11-07 02:03:31,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3146 states, 3142 states have (on average 1.8084022915340547) internal successors, (5682), 3145 states have internal predecessors, (5682), 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 02:03:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3146 states to 3146 states and 5682 transitions. [2021-11-07 02:03:31,946 INFO L78 Accepts]: Start accepts. Automaton has 3146 states and 5682 transitions. Word has length 79 [2021-11-07 02:03:31,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:31,947 INFO L470 AbstractCegarLoop]: Abstraction has 3146 states and 5682 transitions. [2021-11-07 02:03:31,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:31,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3146 states and 5682 transitions. [2021-11-07 02:03:31,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 02:03:31,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:31,955 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:31,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:32,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:32,170 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:32,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:32,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2081116408, now seen corresponding path program 1 times [2021-11-07 02:03:32,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:32,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059782912] [2021-11-07 02:03:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:32,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:32,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:32,173 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:32,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:03:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:32,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:32,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:33,000 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 02:03:33,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:33,207 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 02:03:33,207 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:33,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059782912] [2021-11-07 02:03:33,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059782912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:33,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:33,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:33,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229339974] [2021-11-07 02:03:33,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:33,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:33,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:33,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:33,210 INFO L87 Difference]: Start difference. First operand 3146 states and 5682 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 02:03:33,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:33,597 INFO L93 Difference]: Finished difference Result 8526 states and 15430 transitions. [2021-11-07 02:03:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:33,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 80 [2021-11-07 02:03:33,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:33,642 INFO L225 Difference]: With dead ends: 8526 [2021-11-07 02:03:33,642 INFO L226 Difference]: Without dead ends: 5548 [2021-11-07 02:03:33,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 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 02:03:33,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5548 states. [2021-11-07 02:03:34,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5548 to 5300. [2021-11-07 02:03:34,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5300 states, 5296 states have (on average 1.8117447129909365) internal successors, (9595), 5299 states have internal predecessors, (9595), 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 02:03:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5300 states to 5300 states and 9595 transitions. [2021-11-07 02:03:34,050 INFO L78 Accepts]: Start accepts. Automaton has 5300 states and 9595 transitions. Word has length 80 [2021-11-07 02:03:34,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:34,051 INFO L470 AbstractCegarLoop]: Abstraction has 5300 states and 9595 transitions. [2021-11-07 02:03:34,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 02:03:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 5300 states and 9595 transitions. [2021-11-07 02:03:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 02:03:34,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:34,062 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:34,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:34,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:34,281 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:34,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:34,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1573974168, now seen corresponding path program 1 times [2021-11-07 02:03:34,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:34,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566425230] [2021-11-07 02:03:34,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:34,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:34,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:34,285 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:34,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:03:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:34,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:34,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:35,187 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 02:03:35,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:35,381 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 02:03:35,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:35,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566425230] [2021-11-07 02:03:35,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566425230] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:35,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:35,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:35,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780098344] [2021-11-07 02:03:35,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:35,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:35,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:35,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:35,385 INFO L87 Difference]: Start difference. First operand 5300 states and 9595 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:35,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:35,948 INFO L93 Difference]: Finished difference Result 15446 states and 28011 transitions. [2021-11-07 02:03:35,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:35,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 02:03:35,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:36,000 INFO L225 Difference]: With dead ends: 15446 [2021-11-07 02:03:36,000 INFO L226 Difference]: Without dead ends: 10318 [2021-11-07 02:03:36,008 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 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 02:03:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10318 states. [2021-11-07 02:03:36,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10318 to 10070. [2021-11-07 02:03:36,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10070 states, 10066 states have (on average 1.813232664414862) internal successors, (18252), 10069 states have internal predecessors, (18252), 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 02:03:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10070 states to 10070 states and 18252 transitions. [2021-11-07 02:03:36,789 INFO L78 Accepts]: Start accepts. Automaton has 10070 states and 18252 transitions. Word has length 81 [2021-11-07 02:03:36,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:36,790 INFO L470 AbstractCegarLoop]: Abstraction has 10070 states and 18252 transitions. [2021-11-07 02:03:36,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:36,790 INFO L276 IsEmpty]: Start isEmpty. Operand 10070 states and 18252 transitions. [2021-11-07 02:03:36,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:03:36,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:36,803 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:36,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:37,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:37,021 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:37,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:37,022 INFO L85 PathProgramCache]: Analyzing trace with hash 438101704, now seen corresponding path program 1 times [2021-11-07 02:03:37,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:37,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754873973] [2021-11-07 02:03:37,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:37,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:37,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:37,025 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:37,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:03:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:37,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:03:37,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:38,057 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 02:03:38,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:38,283 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 02:03:38,284 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:38,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754873973] [2021-11-07 02:03:38,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754873973] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:38,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:38,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:03:38,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773773652] [2021-11-07 02:03:38,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:03:38,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:38,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:03:38,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:03:38,287 INFO L87 Difference]: Start difference. First operand 10070 states and 18252 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 02:03:41,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:41,290 INFO L93 Difference]: Finished difference Result 24841 states and 45035 transitions. [2021-11-07 02:03:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:03:41,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 82 [2021-11-07 02:03:41,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:41,342 INFO L225 Difference]: With dead ends: 24841 [2021-11-07 02:03:41,342 INFO L226 Difference]: Without dead ends: 15021 [2021-11-07 02:03:41,357 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 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 02:03:41,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15021 states. [2021-11-07 02:03:42,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15021 to 10037. [2021-11-07 02:03:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10037 states, 10033 states have (on average 1.8060400677763382) internal successors, (18120), 10036 states have internal predecessors, (18120), 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 02:03:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10037 states to 10037 states and 18120 transitions. [2021-11-07 02:03:42,081 INFO L78 Accepts]: Start accepts. Automaton has 10037 states and 18120 transitions. Word has length 82 [2021-11-07 02:03:42,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:42,081 INFO L470 AbstractCegarLoop]: Abstraction has 10037 states and 18120 transitions. [2021-11-07 02:03:42,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 02:03:42,082 INFO L276 IsEmpty]: Start isEmpty. Operand 10037 states and 18120 transitions. [2021-11-07 02:03:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:03:42,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:42,096 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:42,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:42,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:42,317 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:42,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:42,317 INFO L85 PathProgramCache]: Analyzing trace with hash 2127756905, now seen corresponding path program 1 times [2021-11-07 02:03:42,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:42,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552532994] [2021-11-07 02:03:42,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:42,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:42,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:42,319 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:42,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:03:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:43,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:43,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:43,321 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 02:03:43,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:43,496 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 02:03:43,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:43,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552532994] [2021-11-07 02:03:43,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552532994] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:43,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:43,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:43,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786915277] [2021-11-07 02:03:43,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:43,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:43,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:43,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:43,499 INFO L87 Difference]: Start difference. First operand 10037 states and 18120 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:44,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:44,403 INFO L93 Difference]: Finished difference Result 29361 states and 53069 transitions. [2021-11-07 02:03:44,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:44,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 02:03:44,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:44,449 INFO L225 Difference]: With dead ends: 29361 [2021-11-07 02:03:44,449 INFO L226 Difference]: Without dead ends: 19503 [2021-11-07 02:03:44,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 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 02:03:44,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19503 states. [2021-11-07 02:03:45,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19503 to 19255. [2021-11-07 02:03:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19255 states, 19251 states have (on average 1.805672432600904) internal successors, (34761), 19254 states have internal predecessors, (34761), 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 02:03:45,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19255 states to 19255 states and 34761 transitions. [2021-11-07 02:03:45,579 INFO L78 Accepts]: Start accepts. Automaton has 19255 states and 34761 transitions. Word has length 82 [2021-11-07 02:03:45,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:45,580 INFO L470 AbstractCegarLoop]: Abstraction has 19255 states and 34761 transitions. [2021-11-07 02:03:45,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:45,580 INFO L276 IsEmpty]: Start isEmpty. Operand 19255 states and 34761 transitions. [2021-11-07 02:03:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:03:45,611 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:45,611 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:45,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:45,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:45,825 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:45,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:45,826 INFO L85 PathProgramCache]: Analyzing trace with hash -137669610, now seen corresponding path program 1 times [2021-11-07 02:03:45,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:45,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [33557560] [2021-11-07 02:03:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:45,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:45,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:45,828 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:45,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:03:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:46,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:46,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:46,785 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 02:03:46,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:46,970 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 02:03:46,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:46,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [33557560] [2021-11-07 02:03:46,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [33557560] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:46,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:46,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:46,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749376990] [2021-11-07 02:03:46,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:46,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:46,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:46,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:46,972 INFO L87 Difference]: Start difference. First operand 19255 states and 34761 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 02:03:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:48,732 INFO L93 Difference]: Finished difference Result 57201 states and 103306 transitions. [2021-11-07 02:03:48,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:48,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 83 [2021-11-07 02:03:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:48,833 INFO L225 Difference]: With dead ends: 57201 [2021-11-07 02:03:48,834 INFO L226 Difference]: Without dead ends: 38129 [2021-11-07 02:03:49,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 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 02:03:49,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38129 states. [2021-11-07 02:03:51,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38129 to 37881. [2021-11-07 02:03:51,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37881 states, 37877 states have (on average 1.803152308788975) internal successors, (68298), 37880 states have internal predecessors, (68298), 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 02:03:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37881 states to 37881 states and 68298 transitions. [2021-11-07 02:03:51,219 INFO L78 Accepts]: Start accepts. Automaton has 37881 states and 68298 transitions. Word has length 83 [2021-11-07 02:03:51,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:51,219 INFO L470 AbstractCegarLoop]: Abstraction has 37881 states and 68298 transitions. [2021-11-07 02:03:51,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 02:03:51,220 INFO L276 IsEmpty]: Start isEmpty. Operand 37881 states and 68298 transitions. [2021-11-07 02:03:51,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 02:03:51,241 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:51,241 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:51,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:51,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:51,456 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:51,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:51,456 INFO L85 PathProgramCache]: Analyzing trace with hash 690954178, now seen corresponding path program 1 times [2021-11-07 02:03:51,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:51,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521445322] [2021-11-07 02:03:51,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:51,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:51,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:51,459 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:51,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:03:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:52,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:03:52,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:52,550 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 02:03:52,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:52,804 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 02:03:52,804 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:52,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521445322] [2021-11-07 02:03:52,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521445322] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:52,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:52,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:03:52,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146117868] [2021-11-07 02:03:52,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:03:52,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:52,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:03:52,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:03:52,806 INFO L87 Difference]: Start difference. First operand 37881 states and 68298 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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 02:03:59,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:59,574 INFO L93 Difference]: Finished difference Result 146933 states and 264760 transitions. [2021-11-07 02:03:59,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:03:59,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 02:03:59,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:59,865 INFO L225 Difference]: With dead ends: 146933 [2021-11-07 02:03:59,865 INFO L226 Difference]: Without dead ends: 109301 [2021-11-07 02:03:59,947 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 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 02:04:00,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109301 states. [2021-11-07 02:04:02,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109301 to 37623. [2021-11-07 02:04:02,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37623 states, 37619 states have (on average 1.788085807703554) internal successors, (67266), 37622 states have internal predecessors, (67266), 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 02:04:03,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37623 states to 37623 states and 67266 transitions. [2021-11-07 02:04:03,040 INFO L78 Accepts]: Start accepts. Automaton has 37623 states and 67266 transitions. Word has length 84 [2021-11-07 02:04:03,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:03,040 INFO L470 AbstractCegarLoop]: Abstraction has 37623 states and 67266 transitions. [2021-11-07 02:04:03,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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 02:04:03,040 INFO L276 IsEmpty]: Start isEmpty. Operand 37623 states and 67266 transitions. [2021-11-07 02:04:03,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 02:04:03,065 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:03,065 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:03,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 02:04:03,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:03,274 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:04:03,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:03,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2014133220, now seen corresponding path program 1 times [2021-11-07 02:04:03,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:03,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391404085] [2021-11-07 02:04:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:03,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:03,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:03,276 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:03,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:04:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:04,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:04:04,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:04,337 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 02:04:04,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:04,527 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 02:04:04,527 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:04,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391404085] [2021-11-07 02:04:04,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391404085] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:04,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:04,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:04:04,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494437989] [2021-11-07 02:04:04,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:04:04,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:04,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:04:04,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:04,530 INFO L87 Difference]: Start difference. First operand 37623 states and 67266 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 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 02:04:06,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:06,590 INFO L93 Difference]: Finished difference Result 75239 states and 134526 transitions. [2021-11-07 02:04:06,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:04:06,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 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 84 [2021-11-07 02:04:06,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:06,660 INFO L225 Difference]: With dead ends: 75239 [2021-11-07 02:04:06,661 INFO L226 Difference]: Without dead ends: 37871 [2021-11-07 02:04:06,687 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:06,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37871 states. [2021-11-07 02:04:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37871 to 37623. [2021-11-07 02:04:08,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37623 states, 37619 states have (on average 1.7846832717509769) internal successors, (67138), 37622 states have internal predecessors, (67138), 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 02:04:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37623 states to 37623 states and 67138 transitions. [2021-11-07 02:04:08,851 INFO L78 Accepts]: Start accepts. Automaton has 37623 states and 67138 transitions. Word has length 84 [2021-11-07 02:04:08,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:08,851 INFO L470 AbstractCegarLoop]: Abstraction has 37623 states and 67138 transitions. [2021-11-07 02:04:08,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 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 02:04:08,851 INFO L276 IsEmpty]: Start isEmpty. Operand 37623 states and 67138 transitions. [2021-11-07 02:04:08,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 02:04:08,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:08,866 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:08,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:09,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:09,067 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:04:09,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:09,067 INFO L85 PathProgramCache]: Analyzing trace with hash 508797527, now seen corresponding path program 1 times [2021-11-07 02:04:09,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:09,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208923394] [2021-11-07 02:04:09,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:09,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:09,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:09,069 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:09,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:04:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:10,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:04:10,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:10,216 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 02:04:10,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:10,418 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 02:04:10,418 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:10,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208923394] [2021-11-07 02:04:10,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208923394] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:10,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:10,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:04:10,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915372469] [2021-11-07 02:04:10,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:04:10,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:10,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:04:10,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:04:10,422 INFO L87 Difference]: Start difference. First operand 37623 states and 67138 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 02:04:13,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:13,661 INFO L93 Difference]: Finished difference Result 104465 states and 186056 transitions. [2021-11-07 02:04:13,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:04:13,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 02:04:13,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:13,776 INFO L225 Difference]: With dead ends: 104465 [2021-11-07 02:04:13,776 INFO L226 Difference]: Without dead ends: 67057 [2021-11-07 02:04:13,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 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 02:04:13,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67057 states. [2021-11-07 02:04:17,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67057 to 66809. [2021-11-07 02:04:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66809 states, 66805 states have (on average 1.7752413741486415) internal successors, (118595), 66808 states have internal predecessors, (118595), 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 02:04:17,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66809 states to 66809 states and 118595 transitions. [2021-11-07 02:04:17,712 INFO L78 Accepts]: Start accepts. Automaton has 66809 states and 118595 transitions. Word has length 84 [2021-11-07 02:04:17,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:17,712 INFO L470 AbstractCegarLoop]: Abstraction has 66809 states and 118595 transitions. [2021-11-07 02:04:17,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 02:04:17,712 INFO L276 IsEmpty]: Start isEmpty. Operand 66809 states and 118595 transitions. [2021-11-07 02:04:17,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 02:04:17,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:17,729 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:17,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:17,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:17,930 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:04:17,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:17,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1700744414, now seen corresponding path program 1 times [2021-11-07 02:04:17,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:17,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561955171] [2021-11-07 02:04:17,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:17,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:17,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:17,932 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:17,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:04:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:18,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:04:18,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:19,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:19,334 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:19,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561955171] [2021-11-07 02:04:19,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561955171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:04:19,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1193992221] [2021-11-07 02:04:19,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:19,335 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:04:19,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:04:19,336 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:04:19,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67921511-2e6d-4ec3-80af-b6a16c841eda/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:04:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:20,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:04:20,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:04:20,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:04:21,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1193992221] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:21,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:04:21,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 02:04:21,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564616200] [2021-11-07 02:04:21,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:04:21,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:21,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:04:21,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:04:21,427 INFO L87 Difference]: Start difference. First operand 66809 states and 118595 transitions. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 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)