./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product40.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_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/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_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product40.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/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_3cbc9e72-86ed-4e8f-9151-23663ec45881/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 b2243f2ebf184fce0ef7b08cdc971efef96ae919ab8c33e807ab93ab6dbfb0b7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:33:01,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:33:01,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:33:01,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:33:01,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:33:01,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:33:01,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:33:01,364 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:33:01,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:33:01,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:33:01,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:33:01,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:33:01,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:33:01,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:33:01,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:33:01,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:33:01,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:33:01,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:33:01,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:33:01,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:33:01,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:33:01,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:33:01,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:33:01,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:33:01,419 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:33:01,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:33:01,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:33:01,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:33:01,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:33:01,425 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:33:01,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:33:01,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:33:01,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:33:01,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:33:01,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:33:01,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:33:01,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:33:01,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:33:01,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:33:01,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:33:01,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:33:01,437 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:33:01,490 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:33:01,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:33:01,492 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:33:01,492 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:33:01,493 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:33:01,493 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:33:01,493 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:33:01,493 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:33:01,500 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:33:01,500 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:33:01,501 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:33:01,502 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:33:01,502 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:33:01,502 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:33:01,503 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:33:01,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:33:01,504 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:33:01,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:33:01,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:33:01,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:33:01,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:33:01,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:33:01,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:33:01,505 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:33:01,505 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:33:01,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:33:01,506 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:33:01,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:33:01,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:33:01,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:33:01,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:33:01,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:33:01,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:33:01,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:33:01,509 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:33:01,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:33:01,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:33:01,510 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:33:01,510 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:33:01,511 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_3cbc9e72-86ed-4e8f-9151-23663ec45881/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2243f2ebf184fce0ef7b08cdc971efef96ae919ab8c33e807ab93ab6dbfb0b7 [2021-11-07 01:33:01,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:33:01,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:33:01,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:33:01,834 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:33:01,835 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:33:01,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec0_product40.cil.c [2021-11-07 01:33:01,924 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/data/e08c1fce8/78a0df7d11cf4a29b33b6f223ba8641e/FLAG76a467aa4 [2021-11-07 01:33:02,541 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:33:02,542 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/sv-benchmarks/c/product-lines/email_spec0_product40.cil.c [2021-11-07 01:33:02,567 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/data/e08c1fce8/78a0df7d11cf4a29b33b6f223ba8641e/FLAG76a467aa4 [2021-11-07 01:33:02,744 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/data/e08c1fce8/78a0df7d11cf4a29b33b6f223ba8641e [2021-11-07 01:33:02,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:33:02,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:33:02,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:33:02,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:33:02,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:33:02,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:33:02" (1/1) ... [2021-11-07 01:33:02,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67129c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:02, skipping insertion in model container [2021-11-07 01:33:02,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:33:02" (1/1) ... [2021-11-07 01:33:02,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:33:02,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:33:03,139 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_3cbc9e72-86ed-4e8f-9151-23663ec45881/sv-benchmarks/c/product-lines/email_spec0_product40.cil.c[7657,7670] [2021-11-07 01:33:03,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:33:03,478 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:33:03,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7f32819f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:03, skipping insertion in model container [2021-11-07 01:33:03,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:33:03,480 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:33:03,482 INFO L168 Benchmark]: Toolchain (without parser) took 732.10 ms. Allocated memory is still 111.1 MB. Free memory was 73.0 MB in the beginning and 72.1 MB in the end (delta: 887.5 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:33:03,483 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 111.1 MB. Free memory was 84.9 MB in the beginning and 84.9 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:33:03,483 INFO L168 Benchmark]: CACSL2BoogieTranslator took 728.06 ms. Allocated memory is still 111.1 MB. Free memory was 72.8 MB in the beginning and 72.1 MB in the end (delta: 711.0 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:33:03,485 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 111.1 MB. Free memory was 84.9 MB in the beginning and 84.9 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 728.06 ms. Allocated memory is still 111.1 MB. Free memory was 72.8 MB in the beginning and 72.1 MB in the end (delta: 711.0 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2539]: 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_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/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_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product40.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/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_3cbc9e72-86ed-4e8f-9151-23663ec45881/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 b2243f2ebf184fce0ef7b08cdc971efef96ae919ab8c33e807ab93ab6dbfb0b7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:33:05,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:33:05,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:33:05,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:33:05,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:33:05,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:33:05,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:33:05,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:33:05,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:33:05,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:33:05,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:33:05,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:33:05,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:33:05,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:33:05,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:33:05,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:33:05,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:33:05,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:33:05,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:33:05,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:33:05,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:33:05,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:33:05,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:33:05,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:33:05,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:33:05,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:33:05,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:33:05,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:33:05,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:33:05,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:33:05,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:33:05,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:33:05,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:33:05,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:33:05,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:33:05,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:33:05,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:33:05,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:33:05,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:33:05,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:33:05,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:33:05,907 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:33:05,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:33:05,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:33:05,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:33:05,953 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:33:05,953 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:33:05,954 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:33:05,954 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:33:05,954 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:33:05,954 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:33:05,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:33:05,957 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:33:05,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:33:05,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:33:05,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:33:05,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:33:05,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:33:05,959 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:33:05,959 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:33:05,959 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:33:05,959 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:33:05,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:33:05,960 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:33:05,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:33:05,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:33:05,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:33:05,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:33:05,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:33:05,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:33:05,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:33:05,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:33:05,962 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:33:05,962 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:33:05,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:33:05,962 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:33:05,963 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:33:05,963 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_3cbc9e72-86ed-4e8f-9151-23663ec45881/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2243f2ebf184fce0ef7b08cdc971efef96ae919ab8c33e807ab93ab6dbfb0b7 [2021-11-07 01:33:06,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:33:06,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:33:06,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:33:06,408 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:33:06,408 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:33:06,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec0_product40.cil.c [2021-11-07 01:33:06,495 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/data/a35896b62/27077c272eb5493bba111b4cbfc91901/FLAG243a11c77 [2021-11-07 01:33:07,251 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:33:07,252 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/sv-benchmarks/c/product-lines/email_spec0_product40.cil.c [2021-11-07 01:33:07,272 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/data/a35896b62/27077c272eb5493bba111b4cbfc91901/FLAG243a11c77 [2021-11-07 01:33:07,430 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/data/a35896b62/27077c272eb5493bba111b4cbfc91901 [2021-11-07 01:33:07,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:33:07,435 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:33:07,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:33:07,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:33:07,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:33:07,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:33:07" (1/1) ... [2021-11-07 01:33:07,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29d8a07d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:07, skipping insertion in model container [2021-11-07 01:33:07,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:33:07" (1/1) ... [2021-11-07 01:33:07,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:33:07,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:33:07,851 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_3cbc9e72-86ed-4e8f-9151-23663ec45881/sv-benchmarks/c/product-lines/email_spec0_product40.cil.c[7657,7670] [2021-11-07 01:33:08,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:33:08,173 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:33:08,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:33:08,243 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_3cbc9e72-86ed-4e8f-9151-23663ec45881/sv-benchmarks/c/product-lines/email_spec0_product40.cil.c[7657,7670] [2021-11-07 01:33:08,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:33:08,379 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:33:08,410 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_3cbc9e72-86ed-4e8f-9151-23663ec45881/sv-benchmarks/c/product-lines/email_spec0_product40.cil.c[7657,7670] [2021-11-07 01:33:08,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:33:08,564 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:33:08,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:08 WrapperNode [2021-11-07 01:33:08,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:33:08,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:33:08,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:33:08,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:33:08,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:08" (1/1) ... [2021-11-07 01:33:08,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:08" (1/1) ... [2021-11-07 01:33:08,739 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:33:08,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:33:08,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:33:08,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:33:08,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:08" (1/1) ... [2021-11-07 01:33:08,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:08" (1/1) ... [2021-11-07 01:33:08,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:08" (1/1) ... [2021-11-07 01:33:08,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:08" (1/1) ... [2021-11-07 01:33:08,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:08" (1/1) ... [2021-11-07 01:33:08,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:08" (1/1) ... [2021-11-07 01:33:08,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:08" (1/1) ... [2021-11-07 01:33:08,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:33:08,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:33:08,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:33:08,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:33:08,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:08" (1/1) ... [2021-11-07 01:33:08,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:33:08,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:33:08,945 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:33:08,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:33:08,995 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:33:08,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:33:08,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:33:08,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:33:08,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:33:13,904 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:33:13,904 INFO L299 CfgBuilder]: Removed 497 assume(true) statements. [2021-11-07 01:33:13,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:33:13 BoogieIcfgContainer [2021-11-07 01:33:13,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:33:13,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:33:13,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:33:13,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:33:13,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:33:07" (1/3) ... [2021-11-07 01:33:13,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2faf54b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:33:13, skipping insertion in model container [2021-11-07 01:33:13,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:08" (2/3) ... [2021-11-07 01:33:13,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2faf54b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:33:13, skipping insertion in model container [2021-11-07 01:33:13,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:33:13" (3/3) ... [2021-11-07 01:33:13,917 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product40.cil.c [2021-11-07 01:33:13,923 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:33:13,924 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:33:13,980 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:33:13,987 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:33:13,987 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:33:14,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 672 states, 665 states have (on average 1.7338345864661655) internal successors, (1153), 671 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:14,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:33:14,069 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:14,070 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:14,070 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:14,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:14,081 INFO L85 PathProgramCache]: Analyzing trace with hash -324340494, now seen corresponding path program 1 times [2021-11-07 01:33:14,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:14,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240549087] [2021-11-07 01:33:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:14,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:14,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:14,109 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:14,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:33:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:14,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:33:14,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:14,755 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 01:33:14,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:14,876 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 01:33:14,877 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:14,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240549087] [2021-11-07 01:33:14,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240549087] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:14,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:14,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:33:14,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230193837] [2021-11-07 01:33:14,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:33:14,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:14,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:33:14,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:33:14,908 INFO L87 Difference]: Start difference. First operand has 672 states, 665 states have (on average 1.7338345864661655) internal successors, (1153), 671 states have internal predecessors, (1153), 0 states have call successors, (0), 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 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:15,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:15,023 INFO L93 Difference]: Finished difference Result 1055 states and 1776 transitions. [2021-11-07 01:33:15,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:33:15,025 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 01:33:15,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:15,052 INFO L225 Difference]: With dead ends: 1055 [2021-11-07 01:33:15,052 INFO L226 Difference]: Without dead ends: 644 [2021-11-07 01:33:15,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:33:15,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-11-07 01:33:15,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 644. [2021-11-07 01:33:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 638 states have (on average 1.7241379310344827) internal successors, (1100), 643 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:15,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1100 transitions. [2021-11-07 01:33:15,174 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1100 transitions. Word has length 47 [2021-11-07 01:33:15,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:15,175 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1100 transitions. [2021-11-07 01:33:15,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:15,175 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1100 transitions. [2021-11-07 01:33:15,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:33:15,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:15,180 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:15,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:15,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:15,396 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:15,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:15,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1252510425, now seen corresponding path program 1 times [2021-11-07 01:33:15,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:15,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688288038] [2021-11-07 01:33:15,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:15,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:15,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:15,400 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:15,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:33:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:15,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:33:15,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:15,954 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 01:33:15,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:16,087 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 01:33:16,088 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:16,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688288038] [2021-11-07 01:33:16,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688288038] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:16,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:16,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:33:16,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100749382] [2021-11-07 01:33:16,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:33:16,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:16,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:33:16,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:16,092 INFO L87 Difference]: Start difference. First operand 644 states and 1100 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:16,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:16,229 INFO L93 Difference]: Finished difference Result 1902 states and 3252 transitions. [2021-11-07 01:33:16,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:16,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:33:16,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:16,238 INFO L225 Difference]: With dead ends: 1902 [2021-11-07 01:33:16,239 INFO L226 Difference]: Without dead ends: 1273 [2021-11-07 01:33:16,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:16,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-11-07 01:33:16,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 643. [2021-11-07 01:33:16,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 637 states have (on average 1.718995290423862) internal successors, (1095), 642 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1095 transitions. [2021-11-07 01:33:16,288 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1095 transitions. Word has length 48 [2021-11-07 01:33:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:16,290 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 1095 transitions. [2021-11-07 01:33:16,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:16,303 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1095 transitions. [2021-11-07 01:33:16,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:33:16,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:16,312 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] [2021-11-07 01:33:16,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:16,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:16,536 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:16,537 INFO L85 PathProgramCache]: Analyzing trace with hash 601394433, now seen corresponding path program 1 times [2021-11-07 01:33:16,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:16,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714883415] [2021-11-07 01:33:16,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:16,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:16,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:16,539 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:16,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:33:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:16,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:33:16,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:17,105 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 01:33:17,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:17,300 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:17,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714883415] [2021-11-07 01:33:17,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714883415] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:17,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:17,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:33:17,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047895117] [2021-11-07 01:33:17,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:17,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:17,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:17,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:17,303 INFO L87 Difference]: Start difference. First operand 643 states and 1095 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:17,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:17,644 INFO L93 Difference]: Finished difference Result 2489 states and 4242 transitions. [2021-11-07 01:33:17,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:33:17,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 01:33:17,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:17,658 INFO L225 Difference]: With dead ends: 2489 [2021-11-07 01:33:17,658 INFO L226 Difference]: Without dead ends: 1864 [2021-11-07 01:33:17,659 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:33:17,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-11-07 01:33:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 642. [2021-11-07 01:33:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 636 states have (on average 1.7154088050314464) internal successors, (1091), 641 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:17,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1091 transitions. [2021-11-07 01:33:17,717 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1091 transitions. Word has length 50 [2021-11-07 01:33:17,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:17,718 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 1091 transitions. [2021-11-07 01:33:17,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1091 transitions. [2021-11-07 01:33:17,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:33:17,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:17,723 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:17,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:17,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:17,941 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:17,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:17,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1808884978, now seen corresponding path program 1 times [2021-11-07 01:33:17,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:17,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056450492] [2021-11-07 01:33:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:17,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:17,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:17,945 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:17,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:33:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:18,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:33:18,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:18,546 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 01:33:18,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:18,730 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 01:33:18,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:18,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056450492] [2021-11-07 01:33:18,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056450492] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:18,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:18,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:33:18,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19550676] [2021-11-07 01:33:18,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:33:18,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:18,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:33:18,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:18,733 INFO L87 Difference]: Start difference. First operand 642 states and 1091 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:18,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:18,843 INFO L93 Difference]: Finished difference Result 1281 states and 2179 transitions. [2021-11-07 01:33:18,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:18,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:33:18,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:18,848 INFO L225 Difference]: With dead ends: 1281 [2021-11-07 01:33:18,849 INFO L226 Difference]: Without dead ends: 647 [2021-11-07 01:33:18,850 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:18,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-07 01:33:18,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 642. [2021-11-07 01:33:18,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 636 states have (on average 1.7106918238993711) internal successors, (1088), 641 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:18,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1088 transitions. [2021-11-07 01:33:18,903 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1088 transitions. Word has length 51 [2021-11-07 01:33:18,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:18,904 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 1088 transitions. [2021-11-07 01:33:18,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:18,904 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1088 transitions. [2021-11-07 01:33:18,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:33:18,906 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:18,906 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:18,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 01:33:19,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:19,121 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:19,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:19,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1961104665, now seen corresponding path program 1 times [2021-11-07 01:33:19,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:19,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889577595] [2021-11-07 01:33:19,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:19,123 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:19,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:19,124 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:19,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:33:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:19,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:33:19,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:19,748 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 01:33:19,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:19,899 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 01:33:19,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:19,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889577595] [2021-11-07 01:33:19,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889577595] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:19,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:19,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:33:19,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599139181] [2021-11-07 01:33:19,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:19,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:19,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:19,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:19,902 INFO L87 Difference]: Start difference. First operand 642 states and 1088 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:20,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:20,240 INFO L93 Difference]: Finished difference Result 2476 states and 4218 transitions. [2021-11-07 01:33:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:33:20,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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 52 [2021-11-07 01:33:20,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:20,252 INFO L225 Difference]: With dead ends: 2476 [2021-11-07 01:33:20,252 INFO L226 Difference]: Without dead ends: 1860 [2021-11-07 01:33:20,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:33:20,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-11-07 01:33:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 642. [2021-11-07 01:33:20,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 636 states have (on average 1.7059748427672956) internal successors, (1085), 641 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:20,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1085 transitions. [2021-11-07 01:33:20,311 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1085 transitions. Word has length 52 [2021-11-07 01:33:20,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:20,311 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 1085 transitions. [2021-11-07 01:33:20,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1085 transitions. [2021-11-07 01:33:20,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:33:20,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:20,313 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] [2021-11-07 01:33:20,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:20,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:20,528 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:20,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:20,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1765443394, now seen corresponding path program 1 times [2021-11-07 01:33:20,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:20,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857477221] [2021-11-07 01:33:20,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:20,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:20,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:20,531 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:20,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:33:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:20,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:20,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:21,113 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 01:33:21,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:21,245 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 01:33:21,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:21,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857477221] [2021-11-07 01:33:21,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857477221] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:21,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:21,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:33:21,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361715216] [2021-11-07 01:33:21,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:33:21,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:21,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:33:21,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:21,248 INFO L87 Difference]: Start difference. First operand 642 states and 1085 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:21,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:21,399 INFO L93 Difference]: Finished difference Result 1613 states and 2713 transitions. [2021-11-07 01:33:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:21,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:33:21,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:21,407 INFO L225 Difference]: With dead ends: 1613 [2021-11-07 01:33:21,407 INFO L226 Difference]: Without dead ends: 1258 [2021-11-07 01:33:21,409 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 104 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 01:33:21,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-11-07 01:33:21,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 903. [2021-11-07 01:33:21,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 897 states have (on average 1.7447045707915274) internal successors, (1565), 902 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:21,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1565 transitions. [2021-11-07 01:33:21,489 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1565 transitions. Word has length 54 [2021-11-07 01:33:21,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:21,490 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 1565 transitions. [2021-11-07 01:33:21,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:21,490 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1565 transitions. [2021-11-07 01:33:21,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:33:21,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:21,493 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:21,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:21,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:21,707 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:21,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:21,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1911725971, now seen corresponding path program 1 times [2021-11-07 01:33:21,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:21,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144904755] [2021-11-07 01:33:21,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:21,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:21,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:21,710 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:21,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:33:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:22,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:22,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:22,303 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 01:33:22,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:22,470 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:22,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144904755] [2021-11-07 01:33:22,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144904755] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:22,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:22,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:22,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155936764] [2021-11-07 01:33:22,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:22,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:22,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:22,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:22,473 INFO L87 Difference]: Start difference. First operand 903 states and 1565 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:22,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:22,631 INFO L93 Difference]: Finished difference Result 2286 states and 3954 transitions. [2021-11-07 01:33:22,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:22,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:33:22,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:22,641 INFO L225 Difference]: With dead ends: 2286 [2021-11-07 01:33:22,641 INFO L226 Difference]: Without dead ends: 1467 [2021-11-07 01:33:22,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:22,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2021-11-07 01:33:22,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1112. [2021-11-07 01:33:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1106 states have (on average 1.7613019891500905) internal successors, (1948), 1111 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:22,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1948 transitions. [2021-11-07 01:33:22,765 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1948 transitions. Word has length 66 [2021-11-07 01:33:22,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:22,765 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 1948 transitions. [2021-11-07 01:33:22,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:22,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1948 transitions. [2021-11-07 01:33:22,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:33:22,769 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:22,769 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:22,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:22,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:22,996 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:22,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:22,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1548434386, now seen corresponding path program 1 times [2021-11-07 01:33:22,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:22,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402180829] [2021-11-07 01:33:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:22,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:22,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:23,001 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:23,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:33:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:23,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:23,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:23,711 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 01:33:23,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:23,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:23,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402180829] [2021-11-07 01:33:23,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402180829] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:23,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:23,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:23,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307555204] [2021-11-07 01:33:23,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:23,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:23,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:23,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:23,873 INFO L87 Difference]: Start difference. First operand 1112 states and 1948 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:24,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:24,034 INFO L93 Difference]: Finished difference Result 2945 states and 5168 transitions. [2021-11-07 01:33:24,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:24,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:33:24,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:24,046 INFO L225 Difference]: With dead ends: 2945 [2021-11-07 01:33:24,047 INFO L226 Difference]: Without dead ends: 1925 [2021-11-07 01:33:24,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:24,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2021-11-07 01:33:24,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1570. [2021-11-07 01:33:24,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1564 states have (on average 1.7838874680306904) internal successors, (2790), 1569 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:24,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 2790 transitions. [2021-11-07 01:33:24,205 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 2790 transitions. Word has length 67 [2021-11-07 01:33:24,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:24,205 INFO L470 AbstractCegarLoop]: Abstraction has 1570 states and 2790 transitions. [2021-11-07 01:33:24,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:24,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 2790 transitions. [2021-11-07 01:33:24,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:33:24,210 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:24,210 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:24,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:24,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:24,429 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:24,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:24,429 INFO L85 PathProgramCache]: Analyzing trace with hash 50994559, now seen corresponding path program 1 times [2021-11-07 01:33:24,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:24,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977207742] [2021-11-07 01:33:24,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:24,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:24,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:24,431 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:24,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:33:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:24,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:24,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:25,058 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 01:33:25,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:25,223 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 01:33:25,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:25,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977207742] [2021-11-07 01:33:25,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977207742] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:25,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:25,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:25,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049889565] [2021-11-07 01:33:25,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:25,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:25,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:25,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:25,229 INFO L87 Difference]: Start difference. First operand 1570 states and 2790 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:25,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:25,445 INFO L93 Difference]: Finished difference Result 4299 states and 7663 transitions. [2021-11-07 01:33:25,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:25,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:33:25,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:25,465 INFO L225 Difference]: With dead ends: 4299 [2021-11-07 01:33:25,465 INFO L226 Difference]: Without dead ends: 2829 [2021-11-07 01:33:25,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2021-11-07 01:33:25,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 2474. [2021-11-07 01:33:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 2468 states have (on average 1.804294975688817) internal successors, (4453), 2473 states have internal predecessors, (4453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 4453 transitions. [2021-11-07 01:33:25,650 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 4453 transitions. Word has length 68 [2021-11-07 01:33:25,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:25,651 INFO L470 AbstractCegarLoop]: Abstraction has 2474 states and 4453 transitions. [2021-11-07 01:33:25,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:25,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 4453 transitions. [2021-11-07 01:33:25,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:33:25,659 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:25,660 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:25,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:25,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:25,875 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:25,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:25,875 INFO L85 PathProgramCache]: Analyzing trace with hash 801427455, now seen corresponding path program 1 times [2021-11-07 01:33:25,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:25,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041300946] [2021-11-07 01:33:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:25,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:25,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:25,877 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:25,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:33:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:26,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:26,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:26,540 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 01:33:26,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:26,724 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 01:33:26,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:26,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041300946] [2021-11-07 01:33:26,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041300946] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:26,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:26,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:26,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538973401] [2021-11-07 01:33:26,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:26,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:26,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:26,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:26,727 INFO L87 Difference]: Start difference. First operand 2474 states and 4453 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:27,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:27,009 INFO L93 Difference]: Finished difference Result 6747 states and 12171 transitions. [2021-11-07 01:33:27,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:27,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:33:27,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:27,040 INFO L225 Difference]: With dead ends: 6747 [2021-11-07 01:33:27,040 INFO L226 Difference]: Without dead ends: 4407 [2021-11-07 01:33:27,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:27,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4407 states. [2021-11-07 01:33:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4407 to 4052. [2021-11-07 01:33:27,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4052 states, 4046 states have (on average 1.8175976272862087) internal successors, (7354), 4051 states have internal predecessors, (7354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4052 states to 4052 states and 7354 transitions. [2021-11-07 01:33:27,338 INFO L78 Accepts]: Start accepts. Automaton has 4052 states and 7354 transitions. Word has length 69 [2021-11-07 01:33:27,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:27,339 INFO L470 AbstractCegarLoop]: Abstraction has 4052 states and 7354 transitions. [2021-11-07 01:33:27,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:27,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4052 states and 7354 transitions. [2021-11-07 01:33:27,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:33:27,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:27,348 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:27,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:27,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:27,567 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:27,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:27,567 INFO L85 PathProgramCache]: Analyzing trace with hash 183505326, now seen corresponding path program 1 times [2021-11-07 01:33:27,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:27,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614939612] [2021-11-07 01:33:27,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:27,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:27,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:27,568 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:27,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:33:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:28,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:28,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:28,202 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 01:33:28,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:28,380 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 01:33:28,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:28,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614939612] [2021-11-07 01:33:28,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614939612] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:28,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:28,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:28,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734391515] [2021-11-07 01:33:28,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:28,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:28,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:28,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:28,389 INFO L87 Difference]: Start difference. First operand 4052 states and 7354 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:28,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:28,852 INFO L93 Difference]: Finished difference Result 11197 states and 20357 transitions. [2021-11-07 01:33:28,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:28,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:33:28,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:28,914 INFO L225 Difference]: With dead ends: 11197 [2021-11-07 01:33:28,914 INFO L226 Difference]: Without dead ends: 7313 [2021-11-07 01:33:28,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:28,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7313 states. [2021-11-07 01:33:29,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7313 to 6958. [2021-11-07 01:33:29,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6958 states, 6952 states have (on average 1.8255178365937859) internal successors, (12691), 6957 states have internal predecessors, (12691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6958 states to 6958 states and 12691 transitions. [2021-11-07 01:33:29,426 INFO L78 Accepts]: Start accepts. Automaton has 6958 states and 12691 transitions. Word has length 70 [2021-11-07 01:33:29,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:29,427 INFO L470 AbstractCegarLoop]: Abstraction has 6958 states and 12691 transitions. [2021-11-07 01:33:29,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:29,428 INFO L276 IsEmpty]: Start isEmpty. Operand 6958 states and 12691 transitions. [2021-11-07 01:33:29,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:33:29,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:29,438 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:29,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:29,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:29,652 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:29,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:29,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1303034190, now seen corresponding path program 1 times [2021-11-07 01:33:29,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:29,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114201953] [2021-11-07 01:33:29,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:29,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:29,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:29,655 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:29,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:33:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:30,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:30,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:30,374 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 01:33:30,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:30,529 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 01:33:30,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:30,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114201953] [2021-11-07 01:33:30,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114201953] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:30,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:30,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:30,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116540355] [2021-11-07 01:33:30,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:30,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:30,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:30,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:30,531 INFO L87 Difference]: Start difference. First operand 6958 states and 12691 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:31,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:31,319 INFO L93 Difference]: Finished difference Result 20241 states and 36979 transitions. [2021-11-07 01:33:31,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:31,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:33:31,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:31,372 INFO L225 Difference]: With dead ends: 20241 [2021-11-07 01:33:31,372 INFO L226 Difference]: Without dead ends: 13459 [2021-11-07 01:33:31,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13459 states. [2021-11-07 01:33:32,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13459 to 13104. [2021-11-07 01:33:32,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13104 states, 13098 states have (on average 1.8302030844403725) internal successors, (23972), 13103 states have internal predecessors, (23972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13104 states to 13104 states and 23972 transitions. [2021-11-07 01:33:32,224 INFO L78 Accepts]: Start accepts. Automaton has 13104 states and 23972 transitions. Word has length 71 [2021-11-07 01:33:32,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:32,225 INFO L470 AbstractCegarLoop]: Abstraction has 13104 states and 23972 transitions. [2021-11-07 01:33:32,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:32,225 INFO L276 IsEmpty]: Start isEmpty. Operand 13104 states and 23972 transitions. [2021-11-07 01:33:32,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:33:32,235 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:32,235 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] [2021-11-07 01:33:32,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:32,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:32,452 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:32,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:32,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1372900894, now seen corresponding path program 1 times [2021-11-07 01:33:32,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:32,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576041971] [2021-11-07 01:33:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:32,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:32,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:32,457 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:32,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:33:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:33,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:33:33,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:33:33,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:33:33,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:33,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576041971] [2021-11-07 01:33:33,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576041971] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:33,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:33,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:33:33,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583558161] [2021-11-07 01:33:33,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:33,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:33,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:33,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:33,445 INFO L87 Difference]: Start difference. First operand 13104 states and 23972 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:36,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:36,874 INFO L93 Difference]: Finished difference Result 32409 states and 59281 transitions. [2021-11-07 01:33:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:33:36,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:33:36,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:36,934 INFO L225 Difference]: With dead ends: 32409 [2021-11-07 01:33:36,934 INFO L226 Difference]: Without dead ends: 19602 [2021-11-07 01:33:36,954 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:33:36,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19602 states. [2021-11-07 01:33:37,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19602 to 13071. [2021-11-07 01:33:37,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13071 states, 13065 states have (on average 1.8247225411404515) internal successors, (23840), 13070 states have internal predecessors, (23840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13071 states to 13071 states and 23840 transitions. [2021-11-07 01:33:37,879 INFO L78 Accepts]: Start accepts. Automaton has 13071 states and 23840 transitions. Word has length 72 [2021-11-07 01:33:37,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:37,880 INFO L470 AbstractCegarLoop]: Abstraction has 13071 states and 23840 transitions. [2021-11-07 01:33:37,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:37,880 INFO L276 IsEmpty]: Start isEmpty. Operand 13071 states and 23840 transitions. [2021-11-07 01:33:37,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:33:37,889 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:37,890 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:37,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:38,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:38,105 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:38,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:38,106 INFO L85 PathProgramCache]: Analyzing trace with hash -191125409, now seen corresponding path program 1 times [2021-11-07 01:33:38,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:38,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137120141] [2021-11-07 01:33:38,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:38,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:38,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:38,107 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:38,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:33:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:38,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:38,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:38,972 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 01:33:38,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:39,135 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 01:33:39,136 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:39,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137120141] [2021-11-07 01:33:39,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137120141] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:39,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:39,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:39,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101034598] [2021-11-07 01:33:39,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:39,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:39,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:39,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:39,139 INFO L87 Difference]: Start difference. First operand 13071 states and 23840 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:40,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:40,293 INFO L93 Difference]: Finished difference Result 38412 states and 70133 transitions. [2021-11-07 01:33:40,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:40,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:33:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:40,387 INFO L225 Difference]: With dead ends: 38412 [2021-11-07 01:33:40,387 INFO L226 Difference]: Without dead ends: 25524 [2021-11-07 01:33:40,409 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:40,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25524 states. [2021-11-07 01:33:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25524 to 25169. [2021-11-07 01:33:41,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25169 states, 25163 states have (on average 1.8262130906489686) internal successors, (45953), 25168 states have internal predecessors, (45953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:41,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25169 states to 25169 states and 45953 transitions. [2021-11-07 01:33:41,763 INFO L78 Accepts]: Start accepts. Automaton has 25169 states and 45953 transitions. Word has length 72 [2021-11-07 01:33:41,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:41,764 INFO L470 AbstractCegarLoop]: Abstraction has 25169 states and 45953 transitions. [2021-11-07 01:33:41,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:41,764 INFO L276 IsEmpty]: Start isEmpty. Operand 25169 states and 45953 transitions. [2021-11-07 01:33:41,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:33:41,776 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:41,776 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:41,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:41,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:41,991 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:41,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash 922484127, now seen corresponding path program 1 times [2021-11-07 01:33:41,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:41,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896091048] [2021-11-07 01:33:41,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:41,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:41,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:41,995 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:42,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:33:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:42,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:42,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:42,813 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 01:33:42,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:42,991 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 01:33:42,991 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:42,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896091048] [2021-11-07 01:33:42,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896091048] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:42,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:42,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:42,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028922502] [2021-11-07 01:33:42,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:42,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:42,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:42,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:42,993 INFO L87 Difference]: Start difference. First operand 25169 states and 45953 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:44,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:44,876 INFO L93 Difference]: Finished difference Result 69345 states and 126208 transitions. [2021-11-07 01:33:44,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:44,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:33:44,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:44,993 INFO L225 Difference]: With dead ends: 69345 [2021-11-07 01:33:44,993 INFO L226 Difference]: Without dead ends: 44406 [2021-11-07 01:33:45,022 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44406 states. [2021-11-07 01:33:47,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44406 to 44051. [2021-11-07 01:33:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44051 states, 44045 states have (on average 1.8149165626064252) internal successors, (79938), 44050 states have internal predecessors, (79938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:47,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44051 states to 44051 states and 79938 transitions. [2021-11-07 01:33:47,929 INFO L78 Accepts]: Start accepts. Automaton has 44051 states and 79938 transitions. Word has length 73 [2021-11-07 01:33:47,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:47,930 INFO L470 AbstractCegarLoop]: Abstraction has 44051 states and 79938 transitions. [2021-11-07 01:33:47,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:47,930 INFO L276 IsEmpty]: Start isEmpty. Operand 44051 states and 79938 transitions. [2021-11-07 01:33:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:33:47,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:47,940 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] [2021-11-07 01:33:47,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:48,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:48,143 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:48,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:48,143 INFO L85 PathProgramCache]: Analyzing trace with hash 670111640, now seen corresponding path program 1 times [2021-11-07 01:33:48,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:48,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816097758] [2021-11-07 01:33:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:48,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:48,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:48,145 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:48,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:33:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:48,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:33:48,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:33:48,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:33:49,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:49,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816097758] [2021-11-07 01:33:49,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816097758] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:49,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:49,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:33:49,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329831793] [2021-11-07 01:33:49,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:49,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:49,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:49,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:49,210 INFO L87 Difference]: Start difference. First operand 44051 states and 79938 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:56,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:56,432 INFO L93 Difference]: Finished difference Result 171472 states and 311053 transitions. [2021-11-07 01:33:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:33:56,432 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:33:56,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:56,791 INFO L225 Difference]: With dead ends: 171472 [2021-11-07 01:33:56,791 INFO L226 Difference]: Without dead ends: 127717 [2021-11-07 01:33:56,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:33:57,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127717 states. [2021-11-07 01:34:00,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127717 to 43793. [2021-11-07 01:34:00,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43793 states, 43787 states have (on average 1.8020417018749857) internal successors, (78906), 43792 states have internal predecessors, (78906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:00,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43793 states to 43793 states and 78906 transitions. [2021-11-07 01:34:00,250 INFO L78 Accepts]: Start accepts. Automaton has 43793 states and 78906 transitions. Word has length 74 [2021-11-07 01:34:00,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:00,250 INFO L470 AbstractCegarLoop]: Abstraction has 43793 states and 78906 transitions. [2021-11-07 01:34:00,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:00,250 INFO L276 IsEmpty]: Start isEmpty. Operand 43793 states and 78906 transitions. [2021-11-07 01:34:00,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:34:00,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:00,264 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] [2021-11-07 01:34:00,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:00,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:00,481 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 01:34:00,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:00,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2057016890, now seen corresponding path program 1 times [2021-11-07 01:34:00,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:00,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670733359] [2021-11-07 01:34:00,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:00,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:00,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:00,483 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:00,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:34:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:01,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:01,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:01,399 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 01:34:01,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:01,588 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 01:34:01,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:01,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670733359] [2021-11-07 01:34:01,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670733359] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:01,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:01,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:34:01,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760408208] [2021-11-07 01:34:01,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:34:01,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:01,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:34:01,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:34:01,591 INFO L87 Difference]: Start difference. First operand 43793 states and 78906 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:03,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:03,678 INFO L93 Difference]: Finished difference Result 87639 states and 157876 transitions. [2021-11-07 01:34:03,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:03,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:34:03,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:03,778 INFO L225 Difference]: With dead ends: 87639 [2021-11-07 01:34:03,779 INFO L226 Difference]: Without dead ends: 44148 [2021-11-07 01:34:03,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 144 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 01:34:03,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44148 states. [2021-11-07 01:34:06,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44148 to 43793. [2021-11-07 01:34:06,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43793 states, 43787 states have (on average 1.7991184598168406) internal successors, (78778), 43792 states have internal predecessors, (78778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:06,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43793 states to 43793 states and 78778 transitions. [2021-11-07 01:34:06,308 INFO L78 Accepts]: Start accepts. Automaton has 43793 states and 78778 transitions. Word has length 74 [2021-11-07 01:34:06,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:06,309 INFO L470 AbstractCegarLoop]: Abstraction has 43793 states and 78778 transitions. [2021-11-07 01:34:06,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:06,309 INFO L276 IsEmpty]: Start isEmpty. Operand 43793 states and 78778 transitions. [2021-11-07 01:34:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:34:06,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:06,316 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:06,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:06,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:06,517 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 01:34:06,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:06,517 INFO L85 PathProgramCache]: Analyzing trace with hash -931846099, now seen corresponding path program 1 times [2021-11-07 01:34:06,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:06,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547236654] [2021-11-07 01:34:06,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:06,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:06,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:06,518 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:06,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbc9e72-86ed-4e8f-9151-23663ec45881/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:34:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:07,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:07,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:07,424 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 01:34:07,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:07,599 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 01:34:07,599 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:07,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547236654] [2021-11-07 01:34:07,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547236654] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:07,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:07,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:34:07,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076347812] [2021-11-07 01:34:07,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:07,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:07,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:07,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:07,601 INFO L87 Difference]: Start difference. First operand 43793 states and 78778 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:11,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:11,220 INFO L93 Difference]: Finished difference Result 122881 states and 220798 transitions. [2021-11-07 01:34:11,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:11,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:34:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:11,358 INFO L225 Difference]: With dead ends: 122881 [2021-11-07 01:34:11,358 INFO L226 Difference]: Without dead ends: 79350 [2021-11-07 01:34:11,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:11,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79350 states.