./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec8_product35.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_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/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_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product35.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/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_bece53b5-608e-4fd6-a736-cb02a15f6930/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 8693f57a03775f9dd58f5523ab36f07a2ce550b119e4923229e8bee683b68937 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:59:01,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:59:01,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:59:01,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:59:01,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:59:01,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:59:01,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:59:01,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:59:01,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:59:01,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:59:01,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:59:01,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:59:01,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:59:01,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:59:01,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:59:01,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:59:01,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:59:01,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:59:01,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:59:01,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:59:01,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:59:01,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:59:01,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:59:01,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:59:01,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:59:01,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:59:01,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:59:01,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:59:01,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:59:01,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:59:01,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:59:01,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:59:01,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:59:01,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:59:01,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:59:01,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:59:01,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:59:01,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:59:01,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:59:01,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:59:01,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:59:01,152 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:59:01,194 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:59:01,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:59:01,195 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:59:01,195 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:59:01,195 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:59:01,196 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:59:01,196 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:59:01,196 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:59:01,196 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:59:01,197 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:59:01,197 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:59:01,197 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:59:01,197 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:59:01,198 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:59:01,198 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:59:01,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:59:01,199 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:59:01,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:59:01,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:59:01,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:59:01,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:59:01,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:59:01,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:59:01,201 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:59:01,201 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:59:01,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:59:01,201 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:59:01,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:59:01,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:59:01,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:59:01,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:59:01,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:59:01,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:59:01,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:59:01,203 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:59:01,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:59:01,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:59:01,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:59:01,204 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:59:01,204 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_bece53b5-608e-4fd6-a736-cb02a15f6930/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8693f57a03775f9dd58f5523ab36f07a2ce550b119e4923229e8bee683b68937 [2021-11-07 00:59:01,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:59:01,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:59:01,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:59:01,570 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:59:01,571 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:59:01,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product35.cil.c [2021-11-07 00:59:01,647 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/data/ddfd4dd30/735cd924055d414c8b4948ec1782969d/FLAG139f8515b [2021-11-07 00:59:02,413 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:59:02,414 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/sv-benchmarks/c/product-lines/email_spec8_product35.cil.c [2021-11-07 00:59:02,448 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/data/ddfd4dd30/735cd924055d414c8b4948ec1782969d/FLAG139f8515b [2021-11-07 00:59:02,563 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/data/ddfd4dd30/735cd924055d414c8b4948ec1782969d [2021-11-07 00:59:02,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:59:02,569 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:59:02,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:59:02,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:59:02,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:59:02,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:59:02" (1/1) ... [2021-11-07 00:59:02,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c12c5e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:02, skipping insertion in model container [2021-11-07 00:59:02,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:59:02" (1/1) ... [2021-11-07 00:59:02,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:59:02,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:59:03,076 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_bece53b5-608e-4fd6-a736-cb02a15f6930/sv-benchmarks/c/product-lines/email_spec8_product35.cil.c[16425,16438] [2021-11-07 00:59:03,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:59:03,243 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 00:59:03,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@325a5fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:03, skipping insertion in model container [2021-11-07 00:59:03,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:59:03,244 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 00:59:03,246 INFO L168 Benchmark]: Toolchain (without parser) took 675.59 ms. Allocated memory is still 107.0 MB. Free memory was 64.6 MB in the beginning and 69.3 MB in the end (delta: -4.7 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. [2021-11-07 00:59:03,247 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 107.0 MB. Free memory was 84.0 MB in the beginning and 83.9 MB in the end (delta: 66.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:59:03,248 INFO L168 Benchmark]: CACSL2BoogieTranslator took 669.95 ms. Allocated memory is still 107.0 MB. Free memory was 64.4 MB in the beginning and 69.6 MB in the end (delta: -5.1 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. [2021-11-07 00:59:03,250 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 107.0 MB. Free memory was 84.0 MB in the beginning and 83.9 MB in the end (delta: 66.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 669.95 ms. Allocated memory is still 107.0 MB. Free memory was 64.4 MB in the beginning and 69.6 MB in the end (delta: -5.1 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1367]: 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_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/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_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product35.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/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_bece53b5-608e-4fd6-a736-cb02a15f6930/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 8693f57a03775f9dd58f5523ab36f07a2ce550b119e4923229e8bee683b68937 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:59:05,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:59:05,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:59:05,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:59:05,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:59:05,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:59:05,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:59:05,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:59:05,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:59:05,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:59:05,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:59:05,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:59:05,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:59:05,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:59:05,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:59:05,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:59:05,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:59:05,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:59:05,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:59:05,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:59:05,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:59:05,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:59:05,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:59:05,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:59:05,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:59:05,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:59:05,637 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:59:05,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:59:05,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:59:05,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:59:05,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:59:05,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:59:05,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:59:05,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:59:05,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:59:05,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:59:05,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:59:05,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:59:05,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:59:05,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:59:05,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:59:05,668 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 00:59:05,713 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:59:05,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:59:05,715 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:59:05,715 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:59:05,715 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:59:05,715 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:59:05,716 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:59:05,716 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:59:05,717 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:59:05,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:59:05,719 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:59:05,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:59:05,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:59:05,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:59:05,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:59:05,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:59:05,721 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:59:05,721 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 00:59:05,721 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 00:59:05,721 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:59:05,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:59:05,721 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:59:05,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:59:05,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:59:05,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 00:59:05,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:59:05,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:59:05,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:59:05,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:59:05,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:59:05,723 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 00:59:05,723 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:05,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:59:05,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:59:05,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:59:05,724 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_bece53b5-608e-4fd6-a736-cb02a15f6930/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8693f57a03775f9dd58f5523ab36f07a2ce550b119e4923229e8bee683b68937 [2021-11-07 00:59:06,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:59:06,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:59:06,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:59:06,135 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:59:06,136 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:59:06,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product35.cil.c [2021-11-07 00:59:06,228 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/data/8277abc19/76ec638620644b59b88380a5543db634/FLAG0055b6133 [2021-11-07 00:59:06,963 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:59:06,964 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/sv-benchmarks/c/product-lines/email_spec8_product35.cil.c [2021-11-07 00:59:06,994 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/data/8277abc19/76ec638620644b59b88380a5543db634/FLAG0055b6133 [2021-11-07 00:59:07,070 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/data/8277abc19/76ec638620644b59b88380a5543db634 [2021-11-07 00:59:07,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:59:07,081 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:59:07,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:59:07,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:59:07,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:59:07,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:59:07" (1/1) ... [2021-11-07 00:59:07,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f65714d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:07, skipping insertion in model container [2021-11-07 00:59:07,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:59:07" (1/1) ... [2021-11-07 00:59:07,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:59:07,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:59:07,733 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_bece53b5-608e-4fd6-a736-cb02a15f6930/sv-benchmarks/c/product-lines/email_spec8_product35.cil.c[16425,16438] [2021-11-07 00:59:07,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:59:07,993 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 00:59:08,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:59:08,065 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_bece53b5-608e-4fd6-a736-cb02a15f6930/sv-benchmarks/c/product-lines/email_spec8_product35.cil.c[16425,16438] [2021-11-07 00:59:08,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:59:08,129 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:59:08,161 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_bece53b5-608e-4fd6-a736-cb02a15f6930/sv-benchmarks/c/product-lines/email_spec8_product35.cil.c[16425,16438] [2021-11-07 00:59:08,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:59:08,293 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:59:08,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:08 WrapperNode [2021-11-07 00:59:08,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:59:08,295 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:59:08,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:59:08,295 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:59:08,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:08" (1/1) ... [2021-11-07 00:59:08,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:08" (1/1) ... [2021-11-07 00:59:08,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:59:08,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:59:08,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:59:08,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:59:08,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:08" (1/1) ... [2021-11-07 00:59:08,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:08" (1/1) ... [2021-11-07 00:59:08,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:08" (1/1) ... [2021-11-07 00:59:08,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:08" (1/1) ... [2021-11-07 00:59:08,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:08" (1/1) ... [2021-11-07 00:59:08,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:08" (1/1) ... [2021-11-07 00:59:08,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:08" (1/1) ... [2021-11-07 00:59:08,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:59:08,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:59:08,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:59:08,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:59:08,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:08" (1/1) ... [2021-11-07 00:59:08,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:59:08,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:59:08,929 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:59:08,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:59:08,987 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 00:59:08,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:59:08,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 00:59:08,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:59:08,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:59:16,044 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:59:16,045 INFO L299 CfgBuilder]: Removed 937 assume(true) statements. [2021-11-07 00:59:16,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:59:16 BoogieIcfgContainer [2021-11-07 00:59:16,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:59:16,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:59:16,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:59:16,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:59:16,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:59:07" (1/3) ... [2021-11-07 00:59:16,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668f2bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:59:16, skipping insertion in model container [2021-11-07 00:59:16,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:08" (2/3) ... [2021-11-07 00:59:16,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668f2bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:59:16, skipping insertion in model container [2021-11-07 00:59:16,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:59:16" (3/3) ... [2021-11-07 00:59:16,068 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec8_product35.cil.c [2021-11-07 00:59:16,074 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:59:16,075 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 00:59:16,134 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:59:16,140 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 00:59:16,140 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 00:59:16,189 INFO L276 IsEmpty]: Start isEmpty. Operand has 1342 states, 1335 states have (on average 1.7191011235955056) internal successors, (2295), 1341 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states 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 00:59:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 00:59:16,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:16,206 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:16,207 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:59:16,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:16,212 INFO L85 PathProgramCache]: Analyzing trace with hash 140083866, now seen corresponding path program 1 times [2021-11-07 00:59:16,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:16,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546309852] [2021-11-07 00:59:16,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:16,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:16,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:16,233 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:16,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 00:59:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:16,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 00:59:16,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:16,876 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 00:59:16,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:17,078 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:17,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546309852] [2021-11-07 00:59:17,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546309852] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:17,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:17,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:59:17,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420818476] [2021-11-07 00:59:17,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 00:59:17,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:17,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 00:59:17,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:59:17,104 INFO L87 Difference]: Start difference. First operand has 1342 states, 1335 states have (on average 1.7191011235955056) internal successors, (2295), 1341 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:17,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:17,254 INFO L93 Difference]: Finished difference Result 2395 states and 4060 transitions. [2021-11-07 00:59:17,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 00:59:17,256 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 00:59:17,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:17,285 INFO L225 Difference]: With dead ends: 2395 [2021-11-07 00:59:17,286 INFO L226 Difference]: Without dead ends: 1096 [2021-11-07 00:59:17,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:59:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-11-07 00:59:17,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1096. [2021-11-07 00:59:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1090 states have (on average 1.7229357798165137) internal successors, (1878), 1095 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states 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 00:59:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1878 transitions. [2021-11-07 00:59:17,438 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1878 transitions. Word has length 48 [2021-11-07 00:59:17,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:17,438 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 1878 transitions. [2021-11-07 00:59:17,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:17,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1878 transitions. [2021-11-07 00:59:17,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 00:59:17,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:17,450 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:17,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 00:59:17,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:17,669 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:59:17,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:17,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1431587077, now seen corresponding path program 1 times [2021-11-07 00:59:17,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:17,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940798842] [2021-11-07 00:59:17,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:17,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:17,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:17,674 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:17,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 00:59:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:18,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:59:18,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:18,376 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 00:59:18,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:18,539 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 00:59:18,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:18,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940798842] [2021-11-07 00:59:18,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940798842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:18,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:18,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:59:18,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635167962] [2021-11-07 00:59:18,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:59:18,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:18,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:59:18,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:18,544 INFO L87 Difference]: Start difference. First operand 1096 states and 1878 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:18,713 INFO L93 Difference]: Finished difference Result 3258 states and 5586 transitions. [2021-11-07 00:59:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:59:18,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 00:59:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:18,730 INFO L225 Difference]: With dead ends: 3258 [2021-11-07 00:59:18,730 INFO L226 Difference]: Without dead ends: 2177 [2021-11-07 00:59:18,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:18,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2021-11-07 00:59:18,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 1095. [2021-11-07 00:59:18,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1089 states have (on average 1.7199265381083564) internal successors, (1873), 1094 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states 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 00:59:18,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1873 transitions. [2021-11-07 00:59:18,808 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1873 transitions. Word has length 49 [2021-11-07 00:59:18,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:18,809 INFO L470 AbstractCegarLoop]: Abstraction has 1095 states and 1873 transitions. [2021-11-07 00:59:18,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1873 transitions. [2021-11-07 00:59:18,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 00:59:18,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:18,819 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:18,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:19,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:19,034 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:59:19,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:19,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1226904469, now seen corresponding path program 1 times [2021-11-07 00:59:19,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:19,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950142589] [2021-11-07 00:59:19,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:19,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:19,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:19,040 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:19,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 00:59:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:19,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:59:19,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:19,702 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 00:59:19,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:19,864 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 00:59:19,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:19,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950142589] [2021-11-07 00:59:19,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950142589] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:19,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:19,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:59:19,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920431540] [2021-11-07 00:59:19,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:59:19,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:19,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:59:19,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:59:19,872 INFO L87 Difference]: Start difference. First operand 1095 states and 1873 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:20,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:20,339 INFO L93 Difference]: Finished difference Result 4297 states and 7354 transitions. [2021-11-07 00:59:20,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:59:20,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 00:59:20,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:20,361 INFO L225 Difference]: With dead ends: 4297 [2021-11-07 00:59:20,361 INFO L226 Difference]: Without dead ends: 3220 [2021-11-07 00:59:20,363 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:59:20,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-11-07 00:59:20,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 1094. [2021-11-07 00:59:20,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1088 states have (on average 1.7178308823529411) internal successors, (1869), 1093 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states 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 00:59:20,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1869 transitions. [2021-11-07 00:59:20,468 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1869 transitions. Word has length 51 [2021-11-07 00:59:20,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:20,468 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1869 transitions. [2021-11-07 00:59:20,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:20,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1869 transitions. [2021-11-07 00:59:20,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 00:59:20,473 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:20,473 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:20,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:20,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:20,688 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:59:20,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:20,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1363845118, now seen corresponding path program 1 times [2021-11-07 00:59:20,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:20,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467746828] [2021-11-07 00:59:20,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:20,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:20,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:20,696 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:20,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 00:59:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:21,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:59:21,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:21,309 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 00:59:21,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:21,448 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 00:59:21,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:21,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467746828] [2021-11-07 00:59:21,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467746828] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:21,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:21,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:59:21,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157319686] [2021-11-07 00:59:21,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:59:21,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:21,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:59:21,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:21,452 INFO L87 Difference]: Start difference. First operand 1094 states and 1869 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:21,596 INFO L93 Difference]: Finished difference Result 2185 states and 3735 transitions. [2021-11-07 00:59:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:59:21,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 00:59:21,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:21,604 INFO L225 Difference]: With dead ends: 2185 [2021-11-07 00:59:21,604 INFO L226 Difference]: Without dead ends: 1099 [2021-11-07 00:59:21,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:21,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-11-07 00:59:21,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 1094. [2021-11-07 00:59:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1088 states have (on average 1.7150735294117647) internal successors, (1866), 1093 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states 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 00:59:21,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1866 transitions. [2021-11-07 00:59:21,683 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1866 transitions. Word has length 52 [2021-11-07 00:59:21,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:21,683 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1866 transitions. [2021-11-07 00:59:21,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1866 transitions. [2021-11-07 00:59:21,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 00:59:21,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:21,685 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:21,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:21,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:21,900 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:59:21,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:21,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2025560237, now seen corresponding path program 1 times [2021-11-07 00:59:21,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:21,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522741625] [2021-11-07 00:59:21,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:21,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:21,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:21,904 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:21,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 00:59:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:22,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:59:22,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:22,529 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 00:59:22,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:22,685 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 00:59:22,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:22,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522741625] [2021-11-07 00:59:22,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522741625] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:22,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:22,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:59:22,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623054252] [2021-11-07 00:59:22,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:59:22,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:22,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:59:22,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:59:22,688 INFO L87 Difference]: Start difference. First operand 1094 states and 1866 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:23,125 INFO L93 Difference]: Finished difference Result 4284 states and 7330 transitions. [2021-11-07 00:59:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:59:23,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 00:59:23,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:23,148 INFO L225 Difference]: With dead ends: 4284 [2021-11-07 00:59:23,148 INFO L226 Difference]: Without dead ends: 3216 [2021-11-07 00:59:23,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:59:23,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3216 states. [2021-11-07 00:59:23,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3216 to 1094. [2021-11-07 00:59:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1088 states have (on average 1.7123161764705883) internal successors, (1863), 1093 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states 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 00:59:23,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1863 transitions. [2021-11-07 00:59:23,294 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1863 transitions. Word has length 53 [2021-11-07 00:59:23,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:23,294 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1863 transitions. [2021-11-07 00:59:23,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:23,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1863 transitions. [2021-11-07 00:59:23,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 00:59:23,296 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:23,296 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:23,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:23,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:23,516 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:59:23,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:23,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1584433074, now seen corresponding path program 1 times [2021-11-07 00:59:23,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:23,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984952407] [2021-11-07 00:59:23,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:23,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:23,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:23,518 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:23,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 00:59:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:24,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:59:24,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:24,162 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 00:59:24,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:24,307 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 00:59:24,307 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:24,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984952407] [2021-11-07 00:59:24,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984952407] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:24,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:24,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:59:24,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758772317] [2021-11-07 00:59:24,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:59:24,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:24,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:59:24,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:24,309 INFO L87 Difference]: Start difference. First operand 1094 states and 1863 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:24,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:24,552 INFO L93 Difference]: Finished difference Result 2969 states and 5047 transitions. [2021-11-07 00:59:24,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:59:24,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 00:59:24,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:24,567 INFO L225 Difference]: With dead ends: 2969 [2021-11-07 00:59:24,567 INFO L226 Difference]: Without dead ends: 2162 [2021-11-07 00:59:24,570 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:24,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-11-07 00:59:24,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1355. [2021-11-07 00:59:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1349 states have (on average 1.736842105263158) internal successors, (2343), 1354 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states 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 00:59:24,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 2343 transitions. [2021-11-07 00:59:24,709 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 2343 transitions. Word has length 55 [2021-11-07 00:59:24,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:24,709 INFO L470 AbstractCegarLoop]: Abstraction has 1355 states and 2343 transitions. [2021-11-07 00:59:24,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:24,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 2343 transitions. [2021-11-07 00:59:24,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 00:59:24,712 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:24,712 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 00:59:24,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:24,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:24,927 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:59:24,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:24,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1824225665, now seen corresponding path program 1 times [2021-11-07 00:59:24,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:24,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565066065] [2021-11-07 00:59:24,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:24,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:24,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:24,929 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:24,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 00:59:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:25,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:59:25,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:25,523 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 00:59:25,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:25,686 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 00:59:25,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:25,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565066065] [2021-11-07 00:59:25,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565066065] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:25,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:25,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:59:25,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788512185] [2021-11-07 00:59:25,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:25,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:25,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:25,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:25,689 INFO L87 Difference]: Start difference. First operand 1355 states and 2343 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:25,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:25,894 INFO L93 Difference]: Finished difference Result 3642 states and 6288 transitions. [2021-11-07 00:59:25,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:25,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 00:59:25,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:25,911 INFO L225 Difference]: With dead ends: 3642 [2021-11-07 00:59:25,911 INFO L226 Difference]: Without dead ends: 2371 [2021-11-07 00:59:25,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:25,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-11-07 00:59:26,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1564. [2021-11-07 00:59:26,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1558 states have (on average 1.7496790757381258) internal successors, (2726), 1563 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states 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 00:59:26,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2726 transitions. [2021-11-07 00:59:26,040 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2726 transitions. Word has length 67 [2021-11-07 00:59:26,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:26,042 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 2726 transitions. [2021-11-07 00:59:26,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:26,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2726 transitions. [2021-11-07 00:59:26,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 00:59:26,046 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:26,046 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:26,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:26,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:26,261 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:59:26,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:26,261 INFO L85 PathProgramCache]: Analyzing trace with hash 847878878, now seen corresponding path program 1 times [2021-11-07 00:59:26,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:26,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973949531] [2021-11-07 00:59:26,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:26,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:26,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:26,263 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:26,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 00:59:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:26,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:59:26,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:26,953 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 00:59:26,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:27,108 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 00:59:27,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:27,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973949531] [2021-11-07 00:59:27,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973949531] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:27,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:27,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:59:27,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864411139] [2021-11-07 00:59:27,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:27,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:27,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:27,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:27,113 INFO L87 Difference]: Start difference. First operand 1564 states and 2726 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:27,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:27,332 INFO L93 Difference]: Finished difference Result 4301 states and 7502 transitions. [2021-11-07 00:59:27,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:27,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 00:59:27,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:27,350 INFO L225 Difference]: With dead ends: 4301 [2021-11-07 00:59:27,350 INFO L226 Difference]: Without dead ends: 2829 [2021-11-07 00:59:27,355 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:27,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2021-11-07 00:59:27,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 2022. [2021-11-07 00:59:27,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2016 states have (on average 1.7698412698412698) internal successors, (3568), 2021 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states 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 00:59:27,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 3568 transitions. [2021-11-07 00:59:27,542 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 3568 transitions. Word has length 68 [2021-11-07 00:59:27,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:27,542 INFO L470 AbstractCegarLoop]: Abstraction has 2022 states and 3568 transitions. [2021-11-07 00:59:27,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:27,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 3568 transitions. [2021-11-07 00:59:27,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 00:59:27,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:27,547 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:27,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:27,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:27,763 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:59:27,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:27,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1109431379, now seen corresponding path program 1 times [2021-11-07 00:59:27,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:27,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724166411] [2021-11-07 00:59:27,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:27,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:27,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:27,766 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:27,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 00:59:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:28,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:59:28,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:28,415 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 00:59:28,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:28,581 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 00:59:28,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:28,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724166411] [2021-11-07 00:59:28,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724166411] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:28,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:28,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:59:28,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75507040] [2021-11-07 00:59:28,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:28,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:28,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:28,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:28,584 INFO L87 Difference]: Start difference. First operand 2022 states and 3568 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:28,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:28,846 INFO L93 Difference]: Finished difference Result 5655 states and 9997 transitions. [2021-11-07 00:59:28,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:28,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 00:59:28,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:28,871 INFO L225 Difference]: With dead ends: 5655 [2021-11-07 00:59:28,871 INFO L226 Difference]: Without dead ends: 3733 [2021-11-07 00:59:28,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:28,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3733 states. [2021-11-07 00:59:29,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3733 to 2926. [2021-11-07 00:59:29,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2926 states, 2920 states have (on average 1.7914383561643836) internal successors, (5231), 2925 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states 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 00:59:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 5231 transitions. [2021-11-07 00:59:29,081 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 5231 transitions. Word has length 69 [2021-11-07 00:59:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:29,082 INFO L470 AbstractCegarLoop]: Abstraction has 2926 states and 5231 transitions. [2021-11-07 00:59:29,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 5231 transitions. [2021-11-07 00:59:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 00:59:29,093 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:29,093 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:29,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:29,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:29,308 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:59:29,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:29,309 INFO L85 PathProgramCache]: Analyzing trace with hash 679151917, now seen corresponding path program 1 times [2021-11-07 00:59:29,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:29,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064860710] [2021-11-07 00:59:29,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:29,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:29,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:29,311 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:29,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 00:59:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:29,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:59:29,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:29,986 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 00:59:29,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:30,142 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 00:59:30,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:30,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064860710] [2021-11-07 00:59:30,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064860710] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:30,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:30,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:59:30,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619599552] [2021-11-07 00:59:30,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:30,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:30,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:30,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:30,145 INFO L87 Difference]: Start difference. First operand 2926 states and 5231 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:30,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:30,486 INFO L93 Difference]: Finished difference Result 8103 states and 14505 transitions. [2021-11-07 00:59:30,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:30,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 00:59:30,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:30,522 INFO L225 Difference]: With dead ends: 8103 [2021-11-07 00:59:30,522 INFO L226 Difference]: Without dead ends: 5311 [2021-11-07 00:59:30,527 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:30,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5311 states. [2021-11-07 00:59:30,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5311 to 4504. [2021-11-07 00:59:30,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4504 states, 4498 states have (on average 1.8079146287238772) internal successors, (8132), 4503 states have internal predecessors, (8132), 0 states have call successors, (0), 0 states 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 00:59:30,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4504 states to 4504 states and 8132 transitions. [2021-11-07 00:59:30,859 INFO L78 Accepts]: Start accepts. Automaton has 4504 states and 8132 transitions. Word has length 70 [2021-11-07 00:59:30,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:30,859 INFO L470 AbstractCegarLoop]: Abstraction has 4504 states and 8132 transitions. [2021-11-07 00:59:30,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:30,860 INFO L276 IsEmpty]: Start isEmpty. Operand 4504 states and 8132 transitions. [2021-11-07 00:59:30,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 00:59:30,865 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:30,866 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:30,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:31,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:31,081 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:59:31,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:31,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1296564898, now seen corresponding path program 1 times [2021-11-07 00:59:31,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:31,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822388519] [2021-11-07 00:59:31,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:31,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:31,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:31,083 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:31,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 00:59:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:31,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:59:31,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:31,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:31,907 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 00:59:31,907 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:31,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822388519] [2021-11-07 00:59:31,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822388519] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:31,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:31,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:59:31,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501868665] [2021-11-07 00:59:31,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:31,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:31,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:31,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:31,909 INFO L87 Difference]: Start difference. First operand 4504 states and 8132 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:32,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:32,336 INFO L93 Difference]: Finished difference Result 12553 states and 22691 transitions. [2021-11-07 00:59:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:32,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 00:59:32,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:32,360 INFO L225 Difference]: With dead ends: 12553 [2021-11-07 00:59:32,360 INFO L226 Difference]: Without dead ends: 8217 [2021-11-07 00:59:32,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:32,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8217 states. [2021-11-07 00:59:32,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8217 to 7410. [2021-11-07 00:59:32,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7404 states have (on average 1.819151809832523) internal successors, (13469), 7409 states have internal predecessors, (13469), 0 states have call successors, (0), 0 states 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 00:59:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 13469 transitions. [2021-11-07 00:59:32,904 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 13469 transitions. Word has length 71 [2021-11-07 00:59:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:32,906 INFO L470 AbstractCegarLoop]: Abstraction has 7410 states and 13469 transitions. [2021-11-07 00:59:32,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:32,907 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 13469 transitions. [2021-11-07 00:59:32,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 00:59:32,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:32,915 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:32,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:33,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:33,131 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:59:33,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:33,132 INFO L85 PathProgramCache]: Analyzing trace with hash -950908482, now seen corresponding path program 1 times [2021-11-07 00:59:33,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:33,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304282870] [2021-11-07 00:59:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:33,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:33,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:33,133 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:33,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 00:59:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:33,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:59:33,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:33,888 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 00:59:33,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:34,035 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 00:59:34,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:34,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304282870] [2021-11-07 00:59:34,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304282870] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:34,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:34,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:59:34,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932387711] [2021-11-07 00:59:34,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:34,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:34,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:34,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:34,038 INFO L87 Difference]: Start difference. First operand 7410 states and 13469 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:34,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:34,725 INFO L93 Difference]: Finished difference Result 21597 states and 39313 transitions. [2021-11-07 00:59:34,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:34,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 00:59:34,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:34,768 INFO L225 Difference]: With dead ends: 21597 [2021-11-07 00:59:34,768 INFO L226 Difference]: Without dead ends: 14363 [2021-11-07 00:59:34,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:34,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14363 states. [2021-11-07 00:59:35,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14363 to 13556. [2021-11-07 00:59:35,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13556 states, 13550 states have (on average 1.8265682656826567) internal successors, (24750), 13555 states have internal predecessors, (24750), 0 states have call successors, (0), 0 states 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 00:59:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13556 states to 13556 states and 24750 transitions. [2021-11-07 00:59:35,583 INFO L78 Accepts]: Start accepts. Automaton has 13556 states and 24750 transitions. Word has length 72 [2021-11-07 00:59:35,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:35,583 INFO L470 AbstractCegarLoop]: Abstraction has 13556 states and 24750 transitions. [2021-11-07 00:59:35,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 13556 states and 24750 transitions. [2021-11-07 00:59:35,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 00:59:35,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:35,594 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:35,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:35,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:35,809 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:59:35,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:35,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1214959342, now seen corresponding path program 1 times [2021-11-07 00:59:35,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:35,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122516775] [2021-11-07 00:59:35,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:35,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:35,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:35,811 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:35,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 00:59:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:36,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:59:36,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:59:36,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:59:36,827 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:36,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122516775] [2021-11-07 00:59:36,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122516775] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:36,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:36,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:59:36,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862371498] [2021-11-07 00:59:36,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:59:36,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:36,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:59:36,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:59:36,830 INFO L87 Difference]: Start difference. First operand 13556 states and 24750 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:40,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:40,107 INFO L93 Difference]: Finished difference Result 33765 states and 61615 transitions. [2021-11-07 00:59:40,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:59:40,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 00:59:40,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:40,157 INFO L225 Difference]: With dead ends: 33765 [2021-11-07 00:59:40,157 INFO L226 Difference]: Without dead ends: 20506 [2021-11-07 00:59:40,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:59:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20506 states. [2021-11-07 00:59:40,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20506 to 13523. [2021-11-07 00:59:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13523 states, 13517 states have (on average 1.8212621143744914) internal successors, (24618), 13522 states have internal predecessors, (24618), 0 states have call successors, (0), 0 states 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 00:59:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13523 states to 13523 states and 24618 transitions. [2021-11-07 00:59:41,015 INFO L78 Accepts]: Start accepts. Automaton has 13523 states and 24618 transitions. Word has length 73 [2021-11-07 00:59:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:41,016 INFO L470 AbstractCegarLoop]: Abstraction has 13523 states and 24618 transitions. [2021-11-07 00:59:41,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 13523 states and 24618 transitions. [2021-11-07 00:59:41,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 00:59:41,024 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:41,024 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:41,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 00:59:41,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:41,240 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:59:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:41,241 INFO L85 PathProgramCache]: Analyzing trace with hash -25215795, now seen corresponding path program 1 times [2021-11-07 00:59:41,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:41,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938291014] [2021-11-07 00:59:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:41,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:41,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:41,242 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:41,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 00:59:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:41,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:59:41,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:42,032 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 00:59:42,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:42,185 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 00:59:42,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:42,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938291014] [2021-11-07 00:59:42,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938291014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:42,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:42,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:59:42,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290310143] [2021-11-07 00:59:42,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:42,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:42,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:42,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:42,187 INFO L87 Difference]: Start difference. First operand 13523 states and 24618 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:43,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:43,339 INFO L93 Difference]: Finished difference Result 39768 states and 72467 transitions. [2021-11-07 00:59:43,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:43,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 00:59:43,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:43,402 INFO L225 Difference]: With dead ends: 39768 [2021-11-07 00:59:43,403 INFO L226 Difference]: Without dead ends: 26428 [2021-11-07 00:59:43,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:43,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26428 states. [2021-11-07 00:59:44,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26428 to 25621. [2021-11-07 00:59:44,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25621 states, 25615 states have (on average 1.8243607261370292) internal successors, (46731), 25620 states have internal predecessors, (46731), 0 states have call successors, (0), 0 states 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 00:59:44,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25621 states to 25621 states and 46731 transitions. [2021-11-07 00:59:44,587 INFO L78 Accepts]: Start accepts. Automaton has 25621 states and 46731 transitions. Word has length 73 [2021-11-07 00:59:44,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:44,587 INFO L470 AbstractCegarLoop]: Abstraction has 25621 states and 46731 transitions. [2021-11-07 00:59:44,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:44,587 INFO L276 IsEmpty]: Start isEmpty. Operand 25621 states and 46731 transitions. [2021-11-07 00:59:44,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 00:59:44,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:44,594 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:44,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:44,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:44,794 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:59:44,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:44,796 INFO L85 PathProgramCache]: Analyzing trace with hash 136941453, now seen corresponding path program 1 times [2021-11-07 00:59:44,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:44,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832475191] [2021-11-07 00:59:44,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:44,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:44,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:44,798 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:44,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 00:59:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:45,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:59:45,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:45,595 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 00:59:45,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:45,788 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 00:59:45,788 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:45,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832475191] [2021-11-07 00:59:45,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832475191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:45,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:45,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:59:45,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342819110] [2021-11-07 00:59:45,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:45,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:45,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:45,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:45,790 INFO L87 Difference]: Start difference. First operand 25621 states and 46731 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:47,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:47,664 INFO L93 Difference]: Finished difference Result 70701 states and 128542 transitions. [2021-11-07 00:59:47,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:47,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 00:59:47,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:47,766 INFO L225 Difference]: With dead ends: 70701 [2021-11-07 00:59:47,766 INFO L226 Difference]: Without dead ends: 45310 [2021-11-07 00:59:47,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:47,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45310 states. [2021-11-07 00:59:49,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45310 to 44503. [2021-11-07 00:59:49,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44503 states, 44497 states have (on average 1.8139649864035778) internal successors, (80716), 44502 states have internal predecessors, (80716), 0 states have call successors, (0), 0 states 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 00:59:49,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44503 states to 44503 states and 80716 transitions. [2021-11-07 00:59:49,990 INFO L78 Accepts]: Start accepts. Automaton has 44503 states and 80716 transitions. Word has length 74 [2021-11-07 00:59:49,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:49,990 INFO L470 AbstractCegarLoop]: Abstraction has 44503 states and 80716 transitions. [2021-11-07 00:59:49,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:49,990 INFO L276 IsEmpty]: Start isEmpty. Operand 44503 states and 80716 transitions. [2021-11-07 00:59:49,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 00:59:49,998 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:49,998 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:50,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:50,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:50,204 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 00:59:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:50,205 INFO L85 PathProgramCache]: Analyzing trace with hash 903328948, now seen corresponding path program 1 times [2021-11-07 00:59:50,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:50,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853866301] [2021-11-07 00:59:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:50,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:50,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:50,330 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:50,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 00:59:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:51,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:59:51,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:51,203 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 00:59:51,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:51,429 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 00:59:51,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:51,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853866301] [2021-11-07 00:59:51,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853866301] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:51,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:51,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:59:51,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19559927] [2021-11-07 00:59:51,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:59:51,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:51,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:59:51,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:59:51,431 INFO L87 Difference]: Start difference. First operand 44503 states and 80716 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:58,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:58,345 INFO L93 Difference]: Finished difference Result 173280 states and 314165 transitions. [2021-11-07 00:59:58,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 00:59:58,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 00:59:58,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:58,578 INFO L225 Difference]: With dead ends: 173280 [2021-11-07 00:59:58,578 INFO L226 Difference]: Without dead ends: 129073 [2021-11-07 00:59:58,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:59:58,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129073 states. [2021-11-07 01:00:01,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129073 to 44245. [2021-11-07 01:00:01,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44245 states, 44239 states have (on average 1.8012161215217342) internal successors, (79684), 44244 states have internal predecessors, (79684), 0 states have call successors, (0), 0 states 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 01:00:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44245 states to 44245 states and 79684 transitions. [2021-11-07 01:00:01,663 INFO L78 Accepts]: Start accepts. Automaton has 44245 states and 79684 transitions. Word has length 75 [2021-11-07 01:00:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:01,664 INFO L470 AbstractCegarLoop]: Abstraction has 44245 states and 79684 transitions. [2021-11-07 01:00:01,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:01,664 INFO L276 IsEmpty]: Start isEmpty. Operand 44245 states and 79684 transitions. [2021-11-07 01:00:01,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:00:01,670 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:01,670 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:01,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:01,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:00:01,871 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:00:01,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:01,871 INFO L85 PathProgramCache]: Analyzing trace with hash 947718738, now seen corresponding path program 1 times [2021-11-07 01:00:01,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:01,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527745224] [2021-11-07 01:00:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:01,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:01,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:01,873 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:01,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:00:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:02,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:00:02,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:02,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:02,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:02,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527745224] [2021-11-07 01:00:02,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527745224] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:02,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:02,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:00:02,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665383483] [2021-11-07 01:00:02,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:00:02,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:02,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:00:02,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:00:02,927 INFO L87 Difference]: Start difference. First operand 44245 states and 79684 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:04,954 INFO L93 Difference]: Finished difference Result 88995 states and 160210 transitions. [2021-11-07 01:00:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:00:04,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:00:04,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:05,016 INFO L225 Difference]: With dead ends: 88995 [2021-11-07 01:00:05,017 INFO L226 Difference]: Without dead ends: 45052 [2021-11-07 01:00:05,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:00:05,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45052 states. [2021-11-07 01:00:07,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45052 to 44245. [2021-11-07 01:00:07,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44245 states, 44239 states have (on average 1.7983227468975338) internal successors, (79556), 44244 states have internal predecessors, (79556), 0 states have call successors, (0), 0 states 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 01:00:07,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44245 states to 44245 states and 79556 transitions. [2021-11-07 01:00:07,183 INFO L78 Accepts]: Start accepts. Automaton has 44245 states and 79556 transitions. Word has length 75 [2021-11-07 01:00:07,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:07,183 INFO L470 AbstractCegarLoop]: Abstraction has 44245 states and 79556 transitions. [2021-11-07 01:00:07,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:07,183 INFO L276 IsEmpty]: Start isEmpty. Operand 44245 states and 79556 transitions. [2021-11-07 01:00:07,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:00:07,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:07,191 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:07,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:07,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:00:07,391 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:00:07,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:07,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1512720705, now seen corresponding path program 1 times [2021-11-07 01:00:07,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:07,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447856427] [2021-11-07 01:00:07,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:07,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:07,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:07,393 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:07,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bece53b5-608e-4fd6-a736-cb02a15f6930/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:00:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:08,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:00:08,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:08,333 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 01:00:08,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:08,560 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 01:00:08,560 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:08,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447856427] [2021-11-07 01:00:08,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447856427] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:08,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:08,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:00:08,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91568636] [2021-11-07 01:00:08,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:00:08,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:08,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:00:08,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:00:08,563 INFO L87 Difference]: Start difference. First operand 44245 states and 79556 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:11,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:11,944 INFO L93 Difference]: Finished difference Result 124237 states and 223132 transitions. [2021-11-07 01:00:11,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:00:11,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:00:11,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:12,102 INFO L225 Difference]: With dead ends: 124237 [2021-11-07 01:00:12,102 INFO L226 Difference]: Without dead ends: 80254 [2021-11-07 01:00:12,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:00:12,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80254 states.