./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec3_product34.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_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/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_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product34.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/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_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/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 34d763a2f472f3a687bfbf36d5640fefeb493025c54d66615a1e88fff5fbc163 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:43:59,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:43:59,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:43:59,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:43:59,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:43:59,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:43:59,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:43:59,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:43:59,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:43:59,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:43:59,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:43:59,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:43:59,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:43:59,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:43:59,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:43:59,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:43:59,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:43:59,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:43:59,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:43:59,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:43:59,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:43:59,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:43:59,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:43:59,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:43:59,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:43:59,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:43:59,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:43:59,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:43:59,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:43:59,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:43:59,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:43:59,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:43:59,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:43:59,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:43:59,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:43:59,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:43:59,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:43:59,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:43:59,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:43:59,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:43:59,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:43:59,176 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:43:59,203 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:43:59,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:43:59,204 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:43:59,205 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:43:59,205 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:43:59,205 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:43:59,205 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:43:59,206 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:43:59,206 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:43:59,206 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:43:59,206 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:43:59,206 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:43:59,207 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:43:59,207 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:43:59,207 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:43:59,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:43:59,208 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:43:59,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:43:59,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:43:59,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:43:59,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:43:59,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:43:59,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:43:59,209 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:43:59,210 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:43:59,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:43:59,210 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:43:59,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:43:59,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:43:59,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:43:59,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:43:59,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:43:59,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:43:59,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:43:59,212 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:43:59,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:43:59,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:43:59,212 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:43:59,213 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:43:59,213 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_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34d763a2f472f3a687bfbf36d5640fefeb493025c54d66615a1e88fff5fbc163 [2021-11-07 01:43:59,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:43:59,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:43:59,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:43:59,491 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:43:59,492 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:43:59,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product34.cil.c [2021-11-07 01:43:59,566 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/data/f236a5701/e4af56a75a02434c92384b4914f2d6df/FLAG078413aff [2021-11-07 01:44:00,267 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:44:00,267 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/sv-benchmarks/c/product-lines/email_spec3_product34.cil.c [2021-11-07 01:44:00,306 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/data/f236a5701/e4af56a75a02434c92384b4914f2d6df/FLAG078413aff [2021-11-07 01:44:00,415 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/data/f236a5701/e4af56a75a02434c92384b4914f2d6df [2021-11-07 01:44:00,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:44:00,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:44:00,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:00,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:44:00,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:44:00,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:00" (1/1) ... [2021-11-07 01:44:00,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5caa4c7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:00, skipping insertion in model container [2021-11-07 01:44:00,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:00" (1/1) ... [2021-11-07 01:44:00,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:44:00,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:01,096 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_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/sv-benchmarks/c/product-lines/email_spec3_product34.cil.c[43803,43816] [2021-11-07 01:44:01,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:01,209 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:44:01,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4065d09d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:01, skipping insertion in model container [2021-11-07 01:44:01,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:01,210 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:44:01,213 INFO L168 Benchmark]: Toolchain (without parser) took 789.27 ms. Allocated memory is still 104.9 MB. Free memory was 70.0 MB in the beginning and 66.5 MB in the end (delta: 3.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:01,214 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 104.9 MB. Free memory is still 57.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:44:01,215 INFO L168 Benchmark]: CACSL2BoogieTranslator took 784.43 ms. Allocated memory is still 104.9 MB. Free memory was 69.9 MB in the beginning and 66.5 MB in the end (delta: 3.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:01,218 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 104.9 MB. Free memory is still 57.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 784.43 ms. Allocated memory is still 104.9 MB. Free memory was 69.9 MB in the beginning and 66.5 MB in the end (delta: 3.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2769]: 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_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/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_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product34.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/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_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/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 34d763a2f472f3a687bfbf36d5640fefeb493025c54d66615a1e88fff5fbc163 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:44:03,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:44:03,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:44:03,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:44:03,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:44:03,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:44:03,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:44:03,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:44:03,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:44:03,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:44:03,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:44:03,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:44:03,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:44:03,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:44:03,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:44:03,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:44:03,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:44:03,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:44:03,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:44:03,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:44:03,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:44:03,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:44:03,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:44:03,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:44:03,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:44:03,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:44:03,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:44:03,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:44:03,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:44:03,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:44:03,574 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:44:03,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:44:03,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:44:03,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:44:03,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:44:03,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:44:03,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:44:03,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:44:03,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:44:03,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:44:03,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:44:03,588 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:44:03,628 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:44:03,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:44:03,630 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:44:03,631 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:44:03,631 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:44:03,631 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:44:03,631 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:44:03,631 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:44:03,632 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:44:03,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:44:03,634 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:44:03,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:44:03,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:44:03,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:44:03,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:44:03,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:44:03,635 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:44:03,635 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:44:03,636 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:44:03,636 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:44:03,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:44:03,636 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:44:03,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:44:03,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:44:03,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:44:03,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:44:03,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:03,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:44:03,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:44:03,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:44:03,638 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:44:03,638 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:03,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:44:03,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:44:03,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:44:03,639 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_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34d763a2f472f3a687bfbf36d5640fefeb493025c54d66615a1e88fff5fbc163 [2021-11-07 01:44:04,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:44:04,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:44:04,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:44:04,100 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:44:04,101 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:44:04,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product34.cil.c [2021-11-07 01:44:04,168 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/data/3ec8a8dae/b9146d4c71464859a3d2c7e247ecd7fd/FLAG2a0df8072 [2021-11-07 01:44:04,906 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:44:04,906 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/sv-benchmarks/c/product-lines/email_spec3_product34.cil.c [2021-11-07 01:44:04,945 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/data/3ec8a8dae/b9146d4c71464859a3d2c7e247ecd7fd/FLAG2a0df8072 [2021-11-07 01:44:05,096 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/data/3ec8a8dae/b9146d4c71464859a3d2c7e247ecd7fd [2021-11-07 01:44:05,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:44:05,100 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:44:05,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:05,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:44:05,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:44:05,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:05" (1/1) ... [2021-11-07 01:44:05,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65d03e1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:05, skipping insertion in model container [2021-11-07 01:44:05,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:05" (1/1) ... [2021-11-07 01:44:05,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:44:05,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:05,780 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_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/sv-benchmarks/c/product-lines/email_spec3_product34.cil.c[43803,43816] [2021-11-07 01:44:05,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:05,884 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:44:05,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:06,058 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_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/sv-benchmarks/c/product-lines/email_spec3_product34.cil.c[43803,43816] [2021-11-07 01:44:06,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:06,120 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:44:06,208 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_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/sv-benchmarks/c/product-lines/email_spec3_product34.cil.c[43803,43816] [2021-11-07 01:44:06,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:06,312 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:44:06,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:06 WrapperNode [2021-11-07 01:44:06,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:06,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:06,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:44:06,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:44:06,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:06" (1/1) ... [2021-11-07 01:44:06,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:06" (1/1) ... [2021-11-07 01:44:06,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:06,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:44:06,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:44:06,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:44:06,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:06" (1/1) ... [2021-11-07 01:44:06,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:06" (1/1) ... [2021-11-07 01:44:06,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:06" (1/1) ... [2021-11-07 01:44:06,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:06" (1/1) ... [2021-11-07 01:44:06,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:06" (1/1) ... [2021-11-07 01:44:06,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:06" (1/1) ... [2021-11-07 01:44:06,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:06" (1/1) ... [2021-11-07 01:44:06,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:44:06,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:44:06,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:44:06,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:44:06,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:06" (1/1) ... [2021-11-07 01:44:06,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:06,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:06,851 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:44:06,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:44:06,937 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:44:06,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:44:06,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:44:06,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:44:06,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:44:13,482 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:44:13,483 INFO L299 CfgBuilder]: Removed 909 assume(true) statements. [2021-11-07 01:44:13,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:13 BoogieIcfgContainer [2021-11-07 01:44:13,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:44:13,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:44:13,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:44:13,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:44:13,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:44:05" (1/3) ... [2021-11-07 01:44:13,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a9cc21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:13, skipping insertion in model container [2021-11-07 01:44:13,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:06" (2/3) ... [2021-11-07 01:44:13,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a9cc21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:13, skipping insertion in model container [2021-11-07 01:44:13,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:13" (3/3) ... [2021-11-07 01:44:13,497 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec3_product34.cil.c [2021-11-07 01:44:13,504 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:44:13,504 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-11-07 01:44:13,569 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:44:13,574 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:44:13,575 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-11-07 01:44:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 1380 states, 1367 states have (on average 1.7307973664959766) internal successors, (2366), 1379 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:44:13,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:13,665 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 01:44:13,666 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:44:13,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2095635949, now seen corresponding path program 1 times [2021-11-07 01:44:13,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:13,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498514588] [2021-11-07 01:44:13,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:13,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:13,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:13,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:13,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:44:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:14,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:44:14,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:14,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:14,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:14,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498514588] [2021-11-07 01:44:14,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498514588] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:14,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:14,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:44:14,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665835413] [2021-11-07 01:44:14,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:44:14,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:14,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:44:14,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:44:14,623 INFO L87 Difference]: Start difference. First operand has 1380 states, 1367 states have (on average 1.7307973664959766) internal successors, (2366), 1379 states have internal predecessors, (2366), 0 states have call successors, (0), 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 30.0) internal successors, (60), 2 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 01:44:14,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:14,727 INFO L93 Difference]: Finished difference Result 2475 states and 4209 transitions. [2021-11-07 01:44:14,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:44:14,729 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 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 60 [2021-11-07 01:44:14,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:14,760 INFO L225 Difference]: With dead ends: 2475 [2021-11-07 01:44:14,761 INFO L226 Difference]: Without dead ends: 1216 [2021-11-07 01:44:14,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:44:14,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-11-07 01:44:14,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1216. [2021-11-07 01:44:14,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1204 states have (on average 1.728405315614618) internal successors, (2081), 1215 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 2081 transitions. [2021-11-07 01:44:14,923 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 2081 transitions. Word has length 60 [2021-11-07 01:44:14,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:14,924 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 2081 transitions. [2021-11-07 01:44:14,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 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 01:44:14,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 2081 transitions. [2021-11-07 01:44:14,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:44:14,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:14,930 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 01:44:14,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:15,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:15,146 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:44:15,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:15,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1117810357, now seen corresponding path program 1 times [2021-11-07 01:44:15,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:15,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059532105] [2021-11-07 01:44:15,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:15,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:15,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:15,150 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:15,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:44:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:15,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:44:15,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:15,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:16,008 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:16,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059532105] [2021-11-07 01:44:16,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059532105] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:16,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:16,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:44:16,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920489927] [2021-11-07 01:44:16,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:16,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:16,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:16,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:16,017 INFO L87 Difference]: Start difference. First operand 1216 states and 2081 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:16,198 INFO L93 Difference]: Finished difference Result 3618 states and 6195 transitions. [2021-11-07 01:44:16,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:44:16,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:44:16,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:16,214 INFO L225 Difference]: With dead ends: 3618 [2021-11-07 01:44:16,214 INFO L226 Difference]: Without dead ends: 2417 [2021-11-07 01:44:16,217 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 01:44:16,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-11-07 01:44:16,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1215. [2021-11-07 01:44:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1203 states have (on average 1.7256857855361596) internal successors, (2076), 1214 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 2076 transitions. [2021-11-07 01:44:16,279 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 2076 transitions. Word has length 61 [2021-11-07 01:44:16,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:16,279 INFO L470 AbstractCegarLoop]: Abstraction has 1215 states and 2076 transitions. [2021-11-07 01:44:16,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:16,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 2076 transitions. [2021-11-07 01:44:16,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:44:16,282 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:16,283 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:16,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:16,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:16,501 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:44:16,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:16,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1790817359, now seen corresponding path program 1 times [2021-11-07 01:44:16,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:16,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012793531] [2021-11-07 01:44:16,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:16,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:16,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:16,507 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:16,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:44:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:16,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:44:16,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:17,187 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 01:44:17,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:17,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:17,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012793531] [2021-11-07 01:44:17,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012793531] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:17,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:17,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:44:17,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239423740] [2021-11-07 01:44:17,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:44:17,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:17,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:44:17,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:44:17,386 INFO L87 Difference]: Start difference. First operand 1215 states and 2076 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 01:44:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:17,851 INFO L93 Difference]: Finished difference Result 4777 states and 8166 transitions. [2021-11-07 01:44:17,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:17,856 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 63 [2021-11-07 01:44:17,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:17,879 INFO L225 Difference]: With dead ends: 4777 [2021-11-07 01:44:17,879 INFO L226 Difference]: Without dead ends: 3580 [2021-11-07 01:44:17,882 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:17,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2021-11-07 01:44:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 1214. [2021-11-07 01:44:17,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1202 states have (on average 1.723793677204659) internal successors, (2072), 1213 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:17,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2072 transitions. [2021-11-07 01:44:17,979 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2072 transitions. Word has length 63 [2021-11-07 01:44:17,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:17,979 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 2072 transitions. [2021-11-07 01:44:17,981 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 01:44:17,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2072 transitions. [2021-11-07 01:44:17,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:44:17,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:17,983 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:18,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:18,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:18,198 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:44:18,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:18,199 INFO L85 PathProgramCache]: Analyzing trace with hash 2046180036, now seen corresponding path program 1 times [2021-11-07 01:44:18,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:18,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129899997] [2021-11-07 01:44:18,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:18,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:18,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:18,202 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:18,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:44:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:18,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:44:18,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:18,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:19,051 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:19,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129899997] [2021-11-07 01:44:19,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129899997] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:19,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:19,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:44:19,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986647293] [2021-11-07 01:44:19,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:19,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:19,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:19,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:19,055 INFO L87 Difference]: Start difference. First operand 1214 states and 2072 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 01:44:19,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:19,174 INFO L93 Difference]: Finished difference Result 2425 states and 4141 transitions. [2021-11-07 01:44:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:44:19,175 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 01:44:19,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:19,183 INFO L225 Difference]: With dead ends: 2425 [2021-11-07 01:44:19,183 INFO L226 Difference]: Without dead ends: 1219 [2021-11-07 01:44:19,185 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 01:44:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-11-07 01:44:19,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1214. [2021-11-07 01:44:19,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1202 states have (on average 1.721297836938436) internal successors, (2069), 1213 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2069 transitions. [2021-11-07 01:44:19,261 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2069 transitions. Word has length 64 [2021-11-07 01:44:19,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:19,261 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 2069 transitions. [2021-11-07 01:44:19,261 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 01:44:19,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2069 transitions. [2021-11-07 01:44:19,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:44:19,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:19,264 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:19,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:19,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:19,478 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:44:19,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:19,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1912690023, now seen corresponding path program 1 times [2021-11-07 01:44:19,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:19,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512217818] [2021-11-07 01:44:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:19,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:19,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:19,482 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:19,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:44:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:20,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:44:20,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:20,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:20,374 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:20,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512217818] [2021-11-07 01:44:20,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512217818] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:20,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:20,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:44:20,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426388912] [2021-11-07 01:44:20,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:44:20,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:20,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:44:20,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:44:20,376 INFO L87 Difference]: Start difference. First operand 1214 states and 2069 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:20,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:20,812 INFO L93 Difference]: Finished difference Result 4764 states and 8142 transitions. [2021-11-07 01:44:20,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:20,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:44:20,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:20,834 INFO L225 Difference]: With dead ends: 4764 [2021-11-07 01:44:20,834 INFO L226 Difference]: Without dead ends: 3576 [2021-11-07 01:44:20,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:20,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2021-11-07 01:44:20,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 1214. [2021-11-07 01:44:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1202 states have (on average 1.718801996672213) internal successors, (2066), 1213 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:20,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2066 transitions. [2021-11-07 01:44:20,950 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2066 transitions. Word has length 65 [2021-11-07 01:44:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:20,950 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 2066 transitions. [2021-11-07 01:44:20,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:20,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2066 transitions. [2021-11-07 01:44:20,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:44:20,953 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:20,953 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:20,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:21,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:21,168 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:44:21,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:21,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1700193516, now seen corresponding path program 1 times [2021-11-07 01:44:21,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:21,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727096832] [2021-11-07 01:44:21,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:21,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:21,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:21,171 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:21,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:44:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:21,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:21,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:21,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:22,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:22,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727096832] [2021-11-07 01:44:22,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727096832] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:22,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:22,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:44:22,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42154728] [2021-11-07 01:44:22,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:22,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:22,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:22,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:22,097 INFO L87 Difference]: Start difference. First operand 1214 states and 2066 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:22,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:22,298 INFO L93 Difference]: Finished difference Result 3333 states and 5663 transitions. [2021-11-07 01:44:22,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:44:22,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:44:22,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:22,313 INFO L225 Difference]: With dead ends: 3333 [2021-11-07 01:44:22,313 INFO L226 Difference]: Without dead ends: 2402 [2021-11-07 01:44:22,316 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:22,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2021-11-07 01:44:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1471. [2021-11-07 01:44:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1459 states have (on average 1.7402330363262508) internal successors, (2539), 1470 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:22,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 2539 transitions. [2021-11-07 01:44:22,429 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 2539 transitions. Word has length 67 [2021-11-07 01:44:22,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:22,430 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 2539 transitions. [2021-11-07 01:44:22,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:22,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 2539 transitions. [2021-11-07 01:44:22,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:22,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:22,433 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 01:44:22,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:22,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:22,648 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:44:22,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:22,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1146726309, now seen corresponding path program 1 times [2021-11-07 01:44:22,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:22,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550298882] [2021-11-07 01:44:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:22,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:22,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:22,651 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:22,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:44:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:23,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:23,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:23,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:23,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:23,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550298882] [2021-11-07 01:44:23,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550298882] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:23,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:23,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:23,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47843696] [2021-11-07 01:44:23,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:23,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:23,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:23,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:23,550 INFO L87 Difference]: Start difference. First operand 1471 states and 2539 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 01:44:23,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:23,778 INFO L93 Difference]: Finished difference Result 3994 states and 6883 transitions. [2021-11-07 01:44:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:23,779 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 01:44:23,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:23,793 INFO L225 Difference]: With dead ends: 3994 [2021-11-07 01:44:23,794 INFO L226 Difference]: Without dead ends: 2607 [2021-11-07 01:44:23,797 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 01:44:23,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-11-07 01:44:23,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1676. [2021-11-07 01:44:23,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1664 states have (on average 1.7518028846153846) internal successors, (2915), 1675 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:23,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2915 transitions. [2021-11-07 01:44:23,941 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 2915 transitions. Word has length 79 [2021-11-07 01:44:23,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:23,941 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 2915 transitions. [2021-11-07 01:44:23,941 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 01:44:23,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 2915 transitions. [2021-11-07 01:44:23,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:44:23,944 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:23,945 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 01:44:23,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:24,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:24,160 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:44:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:24,160 INFO L85 PathProgramCache]: Analyzing trace with hash -482335356, now seen corresponding path program 1 times [2021-11-07 01:44:24,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:24,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646654011] [2021-11-07 01:44:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:24,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:24,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:24,162 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:24,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:44:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:24,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:24,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:24,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:25,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:25,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646654011] [2021-11-07 01:44:25,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646654011] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:25,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:25,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:25,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171024175] [2021-11-07 01:44:25,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:25,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:25,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:25,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:25,086 INFO L87 Difference]: Start difference. First operand 1676 states and 2915 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 01:44:25,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:25,349 INFO L93 Difference]: Finished difference Result 4653 states and 8097 transitions. [2021-11-07 01:44:25,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:25,350 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 01:44:25,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:25,368 INFO L225 Difference]: With dead ends: 4653 [2021-11-07 01:44:25,369 INFO L226 Difference]: Without dead ends: 3065 [2021-11-07 01:44:25,373 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 01:44:25,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2021-11-07 01:44:25,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 2134. [2021-11-07 01:44:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2134 states, 2122 states have (on average 1.7704995287464655) internal successors, (3757), 2133 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:25,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2134 states to 2134 states and 3757 transitions. [2021-11-07 01:44:25,546 INFO L78 Accepts]: Start accepts. Automaton has 2134 states and 3757 transitions. Word has length 80 [2021-11-07 01:44:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:25,546 INFO L470 AbstractCegarLoop]: Abstraction has 2134 states and 3757 transitions. [2021-11-07 01:44:25,546 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 01:44:25,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2134 states and 3757 transitions. [2021-11-07 01:44:25,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:44:25,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:25,551 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:25,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:25,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:25,764 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:44:25,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:25,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1567141772, now seen corresponding path program 1 times [2021-11-07 01:44:25,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:25,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746654801] [2021-11-07 01:44:25,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:25,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:25,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:25,767 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:25,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:44:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:26,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:26,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:26,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:26,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:26,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746654801] [2021-11-07 01:44:26,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746654801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:26,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:26,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:44:26,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439173211] [2021-11-07 01:44:26,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:26,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:26,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:26,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:26,783 INFO L87 Difference]: Start difference. First operand 2134 states and 3757 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:27,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:27,004 INFO L93 Difference]: Finished difference Result 4910 states and 8567 transitions. [2021-11-07 01:44:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:27,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 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 01:44:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:27,027 INFO L225 Difference]: With dead ends: 4910 [2021-11-07 01:44:27,028 INFO L226 Difference]: Without dead ends: 3065 [2021-11-07 01:44:27,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:27,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2021-11-07 01:44:27,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 2134. [2021-11-07 01:44:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2134 states, 2122 states have (on average 1.7695570216776626) internal successors, (3755), 2133 states have internal predecessors, (3755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:27,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2134 states to 2134 states and 3755 transitions. [2021-11-07 01:44:27,234 INFO L78 Accepts]: Start accepts. Automaton has 2134 states and 3755 transitions. Word has length 81 [2021-11-07 01:44:27,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:27,235 INFO L470 AbstractCegarLoop]: Abstraction has 2134 states and 3755 transitions. [2021-11-07 01:44:27,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:27,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2134 states and 3755 transitions. [2021-11-07 01:44:27,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:44:27,239 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:27,239 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 01:44:27,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:27,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:27,457 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:44:27,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:27,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1750087635, now seen corresponding path program 1 times [2021-11-07 01:44:27,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:27,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198003494] [2021-11-07 01:44:27,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:27,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:27,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:27,460 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:27,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:44:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:28,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:28,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:28,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:28,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:28,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198003494] [2021-11-07 01:44:28,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198003494] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:28,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:28,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:28,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051279404] [2021-11-07 01:44:28,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:28,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:28,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:28,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:28,366 INFO L87 Difference]: Start difference. First operand 2134 states and 3755 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 01:44:28,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:28,641 INFO L93 Difference]: Finished difference Result 5999 states and 10572 transitions. [2021-11-07 01:44:28,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:28,642 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 01:44:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:28,652 INFO L225 Difference]: With dead ends: 5999 [2021-11-07 01:44:28,652 INFO L226 Difference]: Without dead ends: 3961 [2021-11-07 01:44:28,656 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 01:44:28,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3961 states. [2021-11-07 01:44:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3961 to 3030. [2021-11-07 01:44:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3018 states have (on average 1.7899271040424123) internal successors, (5402), 3029 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 5402 transitions. [2021-11-07 01:44:28,886 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 5402 transitions. Word has length 81 [2021-11-07 01:44:28,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:28,886 INFO L470 AbstractCegarLoop]: Abstraction has 3030 states and 5402 transitions. [2021-11-07 01:44:28,887 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 01:44:28,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 5402 transitions. [2021-11-07 01:44:28,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:44:28,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:28,893 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 01:44:28,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:29,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:29,112 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:44:29,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:29,113 INFO L85 PathProgramCache]: Analyzing trace with hash -136830906, now seen corresponding path program 1 times [2021-11-07 01:44:29,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:29,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014858543] [2021-11-07 01:44:29,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:29,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:29,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:29,114 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:29,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:44:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:29,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:29,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:29,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:30,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:30,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014858543] [2021-11-07 01:44:30,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014858543] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:30,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:30,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:30,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591457022] [2021-11-07 01:44:30,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:30,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:30,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:30,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:30,070 INFO L87 Difference]: Start difference. First operand 3030 states and 5402 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 01:44:30,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:30,401 INFO L93 Difference]: Finished difference Result 8423 states and 15032 transitions. [2021-11-07 01:44:30,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:30,402 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 01:44:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:30,426 INFO L225 Difference]: With dead ends: 8423 [2021-11-07 01:44:30,426 INFO L226 Difference]: Without dead ends: 5523 [2021-11-07 01:44:30,435 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 01:44:30,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2021-11-07 01:44:30,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 4592. [2021-11-07 01:44:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4592 states, 4580 states have (on average 1.8058951965065502) internal successors, (8271), 4591 states have internal predecessors, (8271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:30,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4592 states to 4592 states and 8271 transitions. [2021-11-07 01:44:30,758 INFO L78 Accepts]: Start accepts. Automaton has 4592 states and 8271 transitions. Word has length 82 [2021-11-07 01:44:30,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:30,758 INFO L470 AbstractCegarLoop]: Abstraction has 4592 states and 8271 transitions. [2021-11-07 01:44:30,759 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 01:44:30,759 INFO L276 IsEmpty]: Start isEmpty. Operand 4592 states and 8271 transitions. [2021-11-07 01:44:30,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:44:30,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:30,767 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 01:44:30,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:30,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:30,983 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:44:30,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:30,984 INFO L85 PathProgramCache]: Analyzing trace with hash 369108580, now seen corresponding path program 1 times [2021-11-07 01:44:30,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:30,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893799620] [2021-11-07 01:44:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:30,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:30,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:30,985 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:30,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:44:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:31,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:31,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:31,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:31,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:31,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893799620] [2021-11-07 01:44:31,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893799620] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:31,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:31,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:31,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665943500] [2021-11-07 01:44:31,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:31,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:31,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:31,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:31,910 INFO L87 Difference]: Start difference. First operand 4592 states and 8271 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 01:44:32,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:32,321 INFO L93 Difference]: Finished difference Result 12825 states and 23122 transitions. [2021-11-07 01:44:32,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:32,321 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 01:44:32,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:32,347 INFO L225 Difference]: With dead ends: 12825 [2021-11-07 01:44:32,347 INFO L226 Difference]: Without dead ends: 8397 [2021-11-07 01:44:32,355 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 01:44:32,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8397 states. [2021-11-07 01:44:32,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8397 to 7466. [2021-11-07 01:44:32,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7466 states, 7454 states have (on average 1.817011000804937) internal successors, (13544), 7465 states have internal predecessors, (13544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:32,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7466 states to 7466 states and 13544 transitions. [2021-11-07 01:44:32,858 INFO L78 Accepts]: Start accepts. Automaton has 7466 states and 13544 transitions. Word has length 83 [2021-11-07 01:44:32,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:32,858 INFO L470 AbstractCegarLoop]: Abstraction has 7466 states and 13544 transitions. [2021-11-07 01:44:32,859 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 01:44:32,859 INFO L276 IsEmpty]: Start isEmpty. Operand 7466 states and 13544 transitions. [2021-11-07 01:44:32,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:44:32,870 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:32,870 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 01:44:32,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:33,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:33,087 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:44:33,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:33,087 INFO L85 PathProgramCache]: Analyzing trace with hash 158418376, now seen corresponding path program 1 times [2021-11-07 01:44:33,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:33,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864487848] [2021-11-07 01:44:33,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:33,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:33,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:33,089 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:33,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:44:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:33,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:44:33,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:33,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:34,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:34,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864487848] [2021-11-07 01:44:34,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864487848] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:34,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:34,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:44:34,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790310971] [2021-11-07 01:44:34,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:44:34,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:34,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:44:34,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:44:34,150 INFO L87 Difference]: Start difference. First operand 7466 states and 13544 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:37,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:37,526 INFO L93 Difference]: Finished difference Result 28375 states and 51511 transitions. [2021-11-07 01:44:37,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:44:37,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 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 01:44:37,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:37,581 INFO L225 Difference]: With dead ends: 28375 [2021-11-07 01:44:37,581 INFO L226 Difference]: Without dead ends: 21196 [2021-11-07 01:44:37,591 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 01:44:37,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21196 states. [2021-11-07 01:44:38,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21196 to 7416. [2021-11-07 01:44:38,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7416 states, 7404 states have (on average 1.8022690437601296) internal successors, (13344), 7415 states have internal predecessors, (13344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:38,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 13344 transitions. [2021-11-07 01:44:38,190 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 13344 transitions. Word has length 84 [2021-11-07 01:44:38,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:38,190 INFO L470 AbstractCegarLoop]: Abstraction has 7416 states and 13344 transitions. [2021-11-07 01:44:38,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:38,191 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 13344 transitions. [2021-11-07 01:44:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:44:38,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:38,200 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 01:44:38,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:38,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:38,417 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:44:38,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:38,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2057338103, now seen corresponding path program 1 times [2021-11-07 01:44:38,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:38,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50879010] [2021-11-07 01:44:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:38,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:38,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:38,418 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:38,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:44:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:39,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:39,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:39,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:39,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:39,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50879010] [2021-11-07 01:44:39,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50879010] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:39,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:39,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:39,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351079020] [2021-11-07 01:44:39,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:39,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:39,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:39,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:39,509 INFO L87 Difference]: Start difference. First operand 7416 states and 13344 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 01:44:40,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:40,142 INFO L93 Difference]: Finished difference Result 21626 states and 38964 transitions. [2021-11-07 01:44:40,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:40,143 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 01:44:40,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:40,180 INFO L225 Difference]: With dead ends: 21626 [2021-11-07 01:44:40,180 INFO L226 Difference]: Without dead ends: 14381 [2021-11-07 01:44:40,193 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 01:44:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14381 states. [2021-11-07 01:44:40,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14381 to 13450. [2021-11-07 01:44:40,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13450 states, 13438 states have (on average 1.8086768864414347) internal successors, (24305), 13449 states have internal predecessors, (24305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:40,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13450 states to 13450 states and 24305 transitions. [2021-11-07 01:44:40,908 INFO L78 Accepts]: Start accepts. Automaton has 13450 states and 24305 transitions. Word has length 84 [2021-11-07 01:44:40,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:40,908 INFO L470 AbstractCegarLoop]: Abstraction has 13450 states and 24305 transitions. [2021-11-07 01:44:40,909 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 01:44:40,909 INFO L276 IsEmpty]: Start isEmpty. Operand 13450 states and 24305 transitions. [2021-11-07 01:44:40,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:44:40,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:40,923 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 01:44:40,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:41,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:41,136 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:44:41,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:41,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1129782339, now seen corresponding path program 1 times [2021-11-07 01:44:41,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:41,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941784322] [2021-11-07 01:44:41,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:41,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:41,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:41,139 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:41,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:44:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:41,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:44:41,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:42,069 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 01:44:42,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:42,328 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 01:44:42,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:42,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941784322] [2021-11-07 01:44:42,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941784322] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:42,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [9104214] [2021-11-07 01:44:42,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:42,329 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:42,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:42,332 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:42,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:44:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:43,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:44:43,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:43,559 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 01:44:43,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:43,880 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 01:44:43,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [9104214] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:43,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:43,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:44:43,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136769329] [2021-11-07 01:44:43,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:44:43,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:43,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:44:43,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:44:43,883 INFO L87 Difference]: Start difference. First operand 13450 states and 24305 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:51,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:51,292 INFO L93 Difference]: Finished difference Result 93418 states and 167469 transitions. [2021-11-07 01:44:51,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:44:51,292 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 01:44:51,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:51,502 INFO L225 Difference]: With dead ends: 93418 [2021-11-07 01:44:51,502 INFO L226 Difference]: Without dead ends: 92505 [2021-11-07 01:44:51,530 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:44:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92505 states. [2021-11-07 01:44:53,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92505 to 26502. [2021-11-07 01:44:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26502 states, 26490 states have (on average 1.8102680256700643) internal successors, (47954), 26501 states have internal predecessors, (47954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:53,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26502 states to 26502 states and 47954 transitions. [2021-11-07 01:44:53,748 INFO L78 Accepts]: Start accepts. Automaton has 26502 states and 47954 transitions. Word has length 85 [2021-11-07 01:44:53,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:53,749 INFO L470 AbstractCegarLoop]: Abstraction has 26502 states and 47954 transitions. [2021-11-07 01:44:53,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:53,749 INFO L276 IsEmpty]: Start isEmpty. Operand 26502 states and 47954 transitions. [2021-11-07 01:44:53,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:44:53,775 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:53,775 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, 1] [2021-11-07 01:44:53,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:53,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:54,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:54,188 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:44:54,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:54,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1982522157, now seen corresponding path program 1 times [2021-11-07 01:44:54,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:54,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595161866] [2021-11-07 01:44:54,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:54,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:54,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:54,190 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:54,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:44:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:54,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:44:54,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:55,203 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 01:44:55,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:55,407 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 01:44:55,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:55,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595161866] [2021-11-07 01:44:55,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595161866] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:55,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [360674932] [2021-11-07 01:44:55,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:55,407 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:55,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:55,408 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:55,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:44:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:56,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:44:56,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:56,679 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 01:44:56,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:56,886 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 01:44:56,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [360674932] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:56,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:56,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:44:56,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799489825] [2021-11-07 01:44:56,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:44:56,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:56,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:44:56,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:44:56,888 INFO L87 Difference]: Start difference. First operand 26502 states and 47954 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 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 01:45:00,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:00,416 INFO L93 Difference]: Finished difference Result 29169 states and 52425 transitions. [2021-11-07 01:45:00,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:45:00,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 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 86 [2021-11-07 01:45:00,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:00,462 INFO L225 Difference]: With dead ends: 29169 [2021-11-07 01:45:00,462 INFO L226 Difference]: Without dead ends: 27713 [2021-11-07 01:45:00,470 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:45:00,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27713 states. [2021-11-07 01:45:01,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27713 to 26496. [2021-11-07 01:45:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26496 states, 26484 states have (on average 1.8101872828877814) internal successors, (47941), 26495 states have internal predecessors, (47941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:02,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26496 states to 26496 states and 47941 transitions. [2021-11-07 01:45:02,017 INFO L78 Accepts]: Start accepts. Automaton has 26496 states and 47941 transitions. Word has length 86 [2021-11-07 01:45:02,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:02,018 INFO L470 AbstractCegarLoop]: Abstraction has 26496 states and 47941 transitions. [2021-11-07 01:45:02,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 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 01:45:02,018 INFO L276 IsEmpty]: Start isEmpty. Operand 26496 states and 47941 transitions. [2021-11-07 01:45:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:45:02,041 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:02,042 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, 1] [2021-11-07 01:45:02,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:02,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:02,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:02,444 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:45:02,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:02,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1332398538, now seen corresponding path program 1 times [2021-11-07 01:45:02,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:02,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857407242] [2021-11-07 01:45:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:02,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:02,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:02,446 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:02,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:45:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:03,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:45:03,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:03,526 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 01:45:03,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:03,724 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 01:45:03,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:03,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857407242] [2021-11-07 01:45:03,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857407242] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:03,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:03,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:45:03,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526273572] [2021-11-07 01:45:03,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:45:03,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:03,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:45:03,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:03,726 INFO L87 Difference]: Start difference. First operand 26496 states and 47941 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 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 01:45:05,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:05,240 INFO L93 Difference]: Finished difference Result 52332 states and 94869 transitions. [2021-11-07 01:45:05,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:45:05,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 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 86 [2021-11-07 01:45:05,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:05,277 INFO L225 Difference]: With dead ends: 52332 [2021-11-07 01:45:05,277 INFO L226 Difference]: Without dead ends: 26126 [2021-11-07 01:45:05,296 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:45:05,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26126 states. [2021-11-07 01:45:06,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26126 to 13448. [2021-11-07 01:45:06,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13448 states, 13436 states have (on average 1.8082762727002084) internal successors, (24296), 13447 states have internal predecessors, (24296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:06,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13448 states to 13448 states and 24296 transitions. [2021-11-07 01:45:06,167 INFO L78 Accepts]: Start accepts. Automaton has 13448 states and 24296 transitions. Word has length 86 [2021-11-07 01:45:06,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:06,167 INFO L470 AbstractCegarLoop]: Abstraction has 13448 states and 24296 transitions. [2021-11-07 01:45:06,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 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 01:45:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand 13448 states and 24296 transitions. [2021-11-07 01:45:06,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:45:06,177 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:06,177 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, 1, 1, 1] [2021-11-07 01:45:06,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:06,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:06,380 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:45:06,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:06,381 INFO L85 PathProgramCache]: Analyzing trace with hash -439665503, now seen corresponding path program 1 times [2021-11-07 01:45:06,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:06,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339879876] [2021-11-07 01:45:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:06,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:06,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:06,382 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:06,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:45:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:07,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:45:07,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:07,473 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 01:45:07,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:07,702 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 01:45:07,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:07,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339879876] [2021-11-07 01:45:07,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339879876] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:07,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [383258173] [2021-11-07 01:45:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:07,703 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:07,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:07,704 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:07,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:45:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:08,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:45:08,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:09,610 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 01:45:09,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:10,012 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 01:45:10,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [383258173] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:10,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:45:10,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:45:10,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376909877] [2021-11-07 01:45:10,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:45:10,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:10,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:45:10,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:45:10,015 INFO L87 Difference]: Start difference. First operand 13448 states and 24296 transitions. Second operand has 16 states, 16 states have (on average 8.75) internal successors, (140), 15 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:34,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:34,649 INFO L93 Difference]: Finished difference Result 38139 states and 66968 transitions. [2021-11-07 01:45:34,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 01:45:34,649 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.75) internal successors, (140), 15 states have internal predecessors, (140), 0 states have call successors, (0), 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 88 [2021-11-07 01:45:34,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:34,693 INFO L225 Difference]: With dead ends: 38139 [2021-11-07 01:45:34,693 INFO L226 Difference]: Without dead ends: 37274 [2021-11-07 01:45:34,701 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1073, Invalid=3483, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 01:45:34,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37274 states. [2021-11-07 01:45:36,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37274 to 27219. [2021-11-07 01:45:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27219 states, 27207 states have (on average 1.8070349542397177) internal successors, (49164), 27218 states have internal predecessors, (49164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:36,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27219 states to 27219 states and 49164 transitions. [2021-11-07 01:45:36,359 INFO L78 Accepts]: Start accepts. Automaton has 27219 states and 49164 transitions. Word has length 88 [2021-11-07 01:45:36,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:36,359 INFO L470 AbstractCegarLoop]: Abstraction has 27219 states and 49164 transitions. [2021-11-07 01:45:36,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.75) internal successors, (140), 15 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:36,359 INFO L276 IsEmpty]: Start isEmpty. Operand 27219 states and 49164 transitions. [2021-11-07 01:45:36,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:45:36,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:36,377 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, 1, 1, 1, 1] [2021-11-07 01:45:36,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-07 01:45:36,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:36,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:36,778 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:45:36,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:36,778 INFO L85 PathProgramCache]: Analyzing trace with hash 756565961, now seen corresponding path program 1 times [2021-11-07 01:45:36,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:36,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724621062] [2021-11-07 01:45:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:36,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:36,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:36,780 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:36,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:45:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:37,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:45:37,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:37,963 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 01:45:37,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:38,217 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 01:45:38,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:38,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724621062] [2021-11-07 01:45:38,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724621062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:38,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [459222242] [2021-11-07 01:45:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:38,218 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:38,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:38,220 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:38,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:45:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:39,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:45:39,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:39,813 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 01:45:39,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:39,984 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 01:45:39,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [459222242] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:39,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:45:39,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 13 [2021-11-07 01:45:39,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452340947] [2021-11-07 01:45:39,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:45:39,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:39,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:45:39,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:45:39,986 INFO L87 Difference]: Start difference. First operand 27219 states and 49164 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 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 01:45:42,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:42,093 INFO L93 Difference]: Finished difference Result 31426 states and 56239 transitions. [2021-11-07 01:45:42,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:45:42,094 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 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 89 [2021-11-07 01:45:42,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:42,131 INFO L225 Difference]: With dead ends: 31426 [2021-11-07 01:45:42,131 INFO L226 Difference]: Without dead ends: 29104 [2021-11-07 01:45:42,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:45:42,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29104 states. [2021-11-07 01:45:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29104 to 27198. [2021-11-07 01:45:43,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27198 states, 27186 states have (on average 1.8065548444052086) internal successors, (49113), 27197 states have internal predecessors, (49113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27198 states to 27198 states and 49113 transitions. [2021-11-07 01:45:43,709 INFO L78 Accepts]: Start accepts. Automaton has 27198 states and 49113 transitions. Word has length 89 [2021-11-07 01:45:43,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:43,710 INFO L470 AbstractCegarLoop]: Abstraction has 27198 states and 49113 transitions. [2021-11-07 01:45:43,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 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 01:45:43,710 INFO L276 IsEmpty]: Start isEmpty. Operand 27198 states and 49113 transitions. [2021-11-07 01:45:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:45:43,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:43,725 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, 1, 1, 1, 1] [2021-11-07 01:45:43,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:43,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-07 01:45:44,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:44,126 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:45:44,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:44,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1321473790, now seen corresponding path program 1 times [2021-11-07 01:45:44,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:44,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591227193] [2021-11-07 01:45:44,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:44,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:44,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:44,128 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:44,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:45:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:45,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:45:45,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:45,383 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 01:45:45,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:45,625 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 01:45:45,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:45,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591227193] [2021-11-07 01:45:45,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591227193] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:45,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1874038179] [2021-11-07 01:45:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:45,626 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:45,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:45,632 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:45,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:45:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:47,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:45:47,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:47,506 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 01:45:47,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:47,748 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 01:45:47,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1874038179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:47,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:45:47,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 01:45:47,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455139710] [2021-11-07 01:45:47,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:45:47,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:47,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:45:47,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:45:47,749 INFO L87 Difference]: Start difference. First operand 27198 states and 49113 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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 01:45:51,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:51,811 INFO L93 Difference]: Finished difference Result 30816 states and 55084 transitions. [2021-11-07 01:45:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:45:51,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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 89 [2021-11-07 01:45:51,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:51,850 INFO L225 Difference]: With dead ends: 30816 [2021-11-07 01:45:51,850 INFO L226 Difference]: Without dead ends: 28590 [2021-11-07 01:45:51,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:45:51,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28590 states. [2021-11-07 01:45:53,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28590 to 27144. [2021-11-07 01:45:53,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27144 states, 27132 states have (on average 1.8058381247235737) internal successors, (48996), 27143 states have internal predecessors, (48996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27144 states to 27144 states and 48996 transitions. [2021-11-07 01:45:53,431 INFO L78 Accepts]: Start accepts. Automaton has 27144 states and 48996 transitions. Word has length 89 [2021-11-07 01:45:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:53,431 INFO L470 AbstractCegarLoop]: Abstraction has 27144 states and 48996 transitions. [2021-11-07 01:45:53,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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 01:45:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 27144 states and 48996 transitions. [2021-11-07 01:45:53,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:45:53,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:53,446 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, 1, 1, 1, 1] [2021-11-07 01:45:53,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:53,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-07 01:45:53,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:53,847 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:45:53,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:53,848 INFO L85 PathProgramCache]: Analyzing trace with hash -404754650, now seen corresponding path program 1 times [2021-11-07 01:45:53,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:53,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786611903] [2021-11-07 01:45:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:53,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:53,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:53,849 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:53,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:45:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:54,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:45:54,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:55,197 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 01:45:55,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:55,442 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 01:45:55,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:55,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786611903] [2021-11-07 01:45:55,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786611903] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:55,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [915265076] [2021-11-07 01:45:55,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:55,442 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:55,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:55,448 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:55,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:45:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:57,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:45:57,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:57,686 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 01:45:57,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:58,129 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 01:45:58,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [915265076] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:58,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:45:58,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:45:58,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981124550] [2021-11-07 01:45:58,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:45:58,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:58,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:45:58,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:45:58,131 INFO L87 Difference]: Start difference. First operand 27144 states and 48996 transitions. Second operand has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:31,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:31,038 INFO L93 Difference]: Finished difference Result 72747 states and 128182 transitions. [2021-11-07 01:46:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 01:46:31,039 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 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 89 [2021-11-07 01:46:31,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:31,151 INFO L225 Difference]: With dead ends: 72747 [2021-11-07 01:46:31,151 INFO L226 Difference]: Without dead ends: 70883 [2021-11-07 01:46:31,165 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1073, Invalid=3483, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 01:46:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70883 states. [2021-11-07 01:46:34,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70883 to 54500. [2021-11-07 01:46:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54500 states, 54488 states have (on average 1.8050763470855968) internal successors, (98355), 54499 states have internal predecessors, (98355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:34,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54500 states to 54500 states and 98355 transitions. [2021-11-07 01:46:34,650 INFO L78 Accepts]: Start accepts. Automaton has 54500 states and 98355 transitions. Word has length 89 [2021-11-07 01:46:34,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:34,650 INFO L470 AbstractCegarLoop]: Abstraction has 54500 states and 98355 transitions. [2021-11-07 01:46:34,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:34,650 INFO L276 IsEmpty]: Start isEmpty. Operand 54500 states and 98355 transitions. [2021-11-07 01:46:34,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:46:34,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:34,687 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, 1, 1, 1, 1] [2021-11-07 01:46:34,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:34,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:35,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:35,094 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:46:35,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:35,095 INFO L85 PathProgramCache]: Analyzing trace with hash -264206040, now seen corresponding path program 1 times [2021-11-07 01:46:35,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:35,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310217216] [2021-11-07 01:46:35,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:35,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:35,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:35,100 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:35,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:46:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:36,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:36,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:36,530 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 01:46:36,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:36,764 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 01:46:36,764 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:36,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310217216] [2021-11-07 01:46:36,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310217216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:36,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1187707992] [2021-11-07 01:46:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:36,765 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:36,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:36,765 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:36,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7dcc3-2d44-4a74-bdc5-fa601ca3c75a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:46:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:38,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:46:38,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:38,810 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 01:46:38,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:39,153 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 01:46:39,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1187707992] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:39,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:46:39,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 20 [2021-11-07 01:46:39,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017198397] [2021-11-07 01:46:39,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:46:39,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:39,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:46:39,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:46:39,155 INFO L87 Difference]: Start difference. First operand 54500 states and 98355 transitions. Second operand has 14 states, 14 states have (on average 10.5) internal successors, (147), 14 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:58,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:58,697 INFO L93 Difference]: Finished difference Result 106922 states and 185694 transitions. [2021-11-07 01:46:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 01:46:58,697 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.5) internal successors, (147), 14 states have internal predecessors, (147), 0 states have call successors, (0), 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 89 [2021-11-07 01:46:58,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:58,862 INFO L225 Difference]: With dead ends: 106922 [2021-11-07 01:46:58,862 INFO L226 Difference]: Without dead ends: 102460 [2021-11-07 01:46:58,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=862, Invalid=2798, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 01:46:58,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102460 states.