./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product18.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_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/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_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/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_28c7216e-ae15-4a47-8eb9-aae51e8eb920/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 b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:49:48,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:49:48,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:49:48,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:49:48,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:49:48,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:49:48,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:49:48,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:49:48,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:49:48,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:49:48,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:49:48,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:49:48,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:49:48,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:49:48,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:49:48,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:49:48,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:49:48,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:49:48,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:49:48,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:49:48,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:49:48,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:49:48,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:49:48,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:49:48,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:49:48,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:49:48,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:49:48,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:49:48,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:49:48,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:49:48,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:49:48,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:49:48,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:49:48,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:49:48,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:49:48,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:49:48,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:49:48,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:49:48,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:49:48,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:49:48,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:49:48,631 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:49:48,658 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:49:48,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:49:48,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:49:48,659 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:49:48,659 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:49:48,660 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:49:48,660 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:49:48,660 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:49:48,660 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:49:48,660 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:49:48,661 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:49:48,661 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:49:48,661 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:49:48,661 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:49:48,661 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:49:48,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:49:48,662 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:49:48,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:49:48,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:49:48,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:49:48,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:49:48,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:49:48,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:49:48,664 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:49:48,664 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:49:48,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:49:48,664 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:49:48,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:49:48,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:49:48,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:49:48,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:49:48,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:49:48,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:49:48,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:49:48,666 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:49:48,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:49:48,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:49:48,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:49:48,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:49:48,667 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_28c7216e-ae15-4a47-8eb9-aae51e8eb920/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d [2021-11-07 01:49:48,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:49:48,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:49:48,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:49:48,960 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:49:48,961 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:49:48,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2021-11-07 01:49:49,033 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/data/a1cde871a/ef27993d1c2d430a9c2cefb9769b107f/FLAGc926ebf05 [2021-11-07 01:49:49,635 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:49:49,635 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2021-11-07 01:49:49,672 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/data/a1cde871a/ef27993d1c2d430a9c2cefb9769b107f/FLAGc926ebf05 [2021-11-07 01:49:49,860 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/data/a1cde871a/ef27993d1c2d430a9c2cefb9769b107f [2021-11-07 01:49:49,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:49:49,864 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:49:49,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:49:49,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:49:49,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:49:49,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:49:49" (1/1) ... [2021-11-07 01:49:49,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68c58c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:49, skipping insertion in model container [2021-11-07 01:49:49,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:49:49" (1/1) ... [2021-11-07 01:49:49,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:49:49,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:49:50,336 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_28c7216e-ae15-4a47-8eb9-aae51e8eb920/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2021-11-07 01:49:50,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:50,489 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 01:49:50,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3bae43e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:50, skipping insertion in model container [2021-11-07 01:49:50,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:49:50,490 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:49:50,492 INFO L168 Benchmark]: Toolchain (without parser) took 626.17 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 53.0 MB in the beginning and 75.3 MB in the end (delta: -22.4 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:49:50,492 INFO L168 Benchmark]: CDTParser took 0.88 ms. Allocated memory is still 92.3 MB. Free memory is still 72.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:49:50,494 INFO L168 Benchmark]: CACSL2BoogieTranslator took 611.06 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 52.8 MB in the beginning and 75.3 MB in the end (delta: -22.6 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:49:50,495 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.88 ms. Allocated memory is still 92.3 MB. Free memory is still 72.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 611.06 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 52.8 MB in the beginning and 75.3 MB in the end (delta: -22.6 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 115]: 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_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/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_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/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_28c7216e-ae15-4a47-8eb9-aae51e8eb920/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 b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:49:52,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:49:52,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:49:52,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:49:52,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:49:52,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:49:52,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:49:52,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:49:52,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:49:52,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:49:52,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:49:52,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:49:52,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:49:52,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:49:52,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:49:52,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:49:52,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:49:52,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:49:52,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:49:52,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:49:52,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:49:52,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:49:52,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:49:52,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:49:52,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:49:52,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:49:52,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:49:52,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:49:52,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:49:52,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:49:52,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:49:52,720 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:49:52,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:49:52,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:49:52,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:49:52,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:49:52,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:49:52,741 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:49:52,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:49:52,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:49:52,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:49:52,744 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:49:52,769 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:49:52,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:49:52,771 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:49:52,771 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:49:52,771 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:49:52,772 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:49:52,772 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:49:52,772 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:49:52,776 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:49:52,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:49:52,777 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:49:52,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:49:52,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:49:52,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:49:52,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:49:52,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:49:52,779 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:49:52,779 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:49:52,780 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:49:52,781 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:49:52,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:49:52,781 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:49:52,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:49:52,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:49:52,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:49:52,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:49:52,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:49:52,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:49:52,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:49:52,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:49:52,784 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:49:52,785 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:52,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:49:52,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:49:52,786 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:49:52,786 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_28c7216e-ae15-4a47-8eb9-aae51e8eb920/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d [2021-11-07 01:49:53,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:49:53,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:49:53,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:49:53,273 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:49:53,276 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:49:53,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2021-11-07 01:49:53,360 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/data/dce9d5d96/f26fcbffa1e948db9f2f3d4bd159dd1c/FLAG9ba9454c8 [2021-11-07 01:49:54,068 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:49:54,068 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2021-11-07 01:49:54,089 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/data/dce9d5d96/f26fcbffa1e948db9f2f3d4bd159dd1c/FLAG9ba9454c8 [2021-11-07 01:49:54,257 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/data/dce9d5d96/f26fcbffa1e948db9f2f3d4bd159dd1c [2021-11-07 01:49:54,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:49:54,260 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:49:54,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:49:54,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:49:54,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:49:54,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:49:54" (1/1) ... [2021-11-07 01:49:54,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13853516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:54, skipping insertion in model container [2021-11-07 01:49:54,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:49:54" (1/1) ... [2021-11-07 01:49:54,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:49:54,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:49:54,880 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_28c7216e-ae15-4a47-8eb9-aae51e8eb920/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2021-11-07 01:49:55,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:55,101 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:49:55,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:49:55,236 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_28c7216e-ae15-4a47-8eb9-aae51e8eb920/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2021-11-07 01:49:55,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:55,370 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:49:55,444 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_28c7216e-ae15-4a47-8eb9-aae51e8eb920/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2021-11-07 01:49:55,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:55,529 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:49:55,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:55 WrapperNode [2021-11-07 01:49:55,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:49:55,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:49:55,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:49:55,532 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:49:55,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:55" (1/1) ... [2021-11-07 01:49:55,599 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:55" (1/1) ... [2021-11-07 01:49:56,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:49:56,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:49:56,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:49:56,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:49:56,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:55" (1/1) ... [2021-11-07 01:49:56,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:55" (1/1) ... [2021-11-07 01:49:56,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:55" (1/1) ... [2021-11-07 01:49:56,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:55" (1/1) ... [2021-11-07 01:49:56,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:55" (1/1) ... [2021-11-07 01:49:57,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:55" (1/1) ... [2021-11-07 01:49:57,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:55" (1/1) ... [2021-11-07 01:49:57,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:49:57,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:49:57,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:49:57,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:49:57,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:55" (1/1) ... [2021-11-07 01:49:57,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:49:57,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:49:57,594 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:49:57,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:49:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:49:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:49:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:49:57,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:50:20,446 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:50:20,446 INFO L299 CfgBuilder]: Removed 2477 assume(true) statements. [2021-11-07 01:50:20,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:50:20 BoogieIcfgContainer [2021-11-07 01:50:20,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:50:20,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:50:20,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:50:20,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:50:20,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:49:54" (1/3) ... [2021-11-07 01:50:20,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e1ddfcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:50:20, skipping insertion in model container [2021-11-07 01:50:20,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:55" (2/3) ... [2021-11-07 01:50:20,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e1ddfcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:50:20, skipping insertion in model container [2021-11-07 01:50:20,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:50:20" (3/3) ... [2021-11-07 01:50:20,470 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product18.cil.c [2021-11-07 01:50:20,476 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:50:20,477 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-07 01:50:20,578 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:50:20,585 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 01:50:20,585 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-07 01:50:20,800 INFO L276 IsEmpty]: Start isEmpty. Operand has 11523 states, 11512 states have (on average 1.8971507991660876) internal successors, (21840), 11522 states have internal predecessors, (21840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:20,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:50:20,811 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:20,812 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] [2021-11-07 01:50:20,812 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:50:20,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:20,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1060902546, now seen corresponding path program 1 times [2021-11-07 01:50:20,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:20,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701340567] [2021-11-07 01:50:20,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:20,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:20,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:20,841 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:20,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:50:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:21,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:50:21,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:21,369 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 01:50:21,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:21,468 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 01:50:21,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:21,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701340567] [2021-11-07 01:50:21,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701340567] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:21,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:21,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:50:21,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293653660] [2021-11-07 01:50:21,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:50:21,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:21,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:50:21,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:50:21,539 INFO L87 Difference]: Start difference. First operand has 11523 states, 11512 states have (on average 1.8971507991660876) internal successors, (21840), 11522 states have internal predecessors, (21840), 0 states have call successors, (0), 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 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:26,290 INFO L93 Difference]: Finished difference Result 80283 states and 152161 transitions. [2021-11-07 01:50:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:50:26,293 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 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 30 [2021-11-07 01:50:26,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:26,922 INFO L225 Difference]: With dead ends: 80283 [2021-11-07 01:50:26,923 INFO L226 Difference]: Without dead ends: 68761 [2021-11-07 01:50:26,959 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:50:27,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68761 states. [2021-11-07 01:50:27,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68761 to 11535. [2021-11-07 01:50:27,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11535 states, 11525 states have (on average 1.8947505422993491) internal successors, (21837), 11534 states have internal predecessors, (21837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11535 states to 11535 states and 21837 transitions. [2021-11-07 01:50:27,969 INFO L78 Accepts]: Start accepts. Automaton has 11535 states and 21837 transitions. Word has length 30 [2021-11-07 01:50:27,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:27,970 INFO L470 AbstractCegarLoop]: Abstraction has 11535 states and 21837 transitions. [2021-11-07 01:50:27,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:27,970 INFO L276 IsEmpty]: Start isEmpty. Operand 11535 states and 21837 transitions. [2021-11-07 01:50:27,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:50:27,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:27,974 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] [2021-11-07 01:50:28,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:28,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:28,190 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:50:28,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:28,191 INFO L85 PathProgramCache]: Analyzing trace with hash 739551464, now seen corresponding path program 1 times [2021-11-07 01:50:28,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:28,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339961142] [2021-11-07 01:50:28,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:28,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:28,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:28,194 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:28,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:50:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:28,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:50:28,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:28,780 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 01:50:28,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:28,886 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 01:50:28,887 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:28,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339961142] [2021-11-07 01:50:28,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339961142] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:28,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:28,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:50:28,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824098888] [2021-11-07 01:50:28,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:50:28,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:28,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:50:28,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:28,895 INFO L87 Difference]: Start difference. First operand 11535 states and 21837 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:29,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:29,320 INFO L93 Difference]: Finished difference Result 22982 states and 43517 transitions. [2021-11-07 01:50:29,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:50:29,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-11-07 01:50:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:29,354 INFO L225 Difference]: With dead ends: 22982 [2021-11-07 01:50:29,355 INFO L226 Difference]: Without dead ends: 11461 [2021-11-07 01:50:29,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 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 01:50:29,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11461 states. [2021-11-07 01:50:29,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11461 to 11461. [2021-11-07 01:50:29,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11461 states, 11451 states have (on average 1.894419701336128) internal successors, (21693), 11460 states have internal predecessors, (21693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11461 states to 11461 states and 21693 transitions. [2021-11-07 01:50:29,782 INFO L78 Accepts]: Start accepts. Automaton has 11461 states and 21693 transitions. Word has length 32 [2021-11-07 01:50:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:29,784 INFO L470 AbstractCegarLoop]: Abstraction has 11461 states and 21693 transitions. [2021-11-07 01:50:29,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:29,786 INFO L276 IsEmpty]: Start isEmpty. Operand 11461 states and 21693 transitions. [2021-11-07 01:50:29,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:50:29,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:29,801 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] [2021-11-07 01:50:29,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:30,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:30,015 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:50:30,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:30,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1509226250, now seen corresponding path program 1 times [2021-11-07 01:50:30,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:30,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711669825] [2021-11-07 01:50:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:30,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:30,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:30,020 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:30,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:50:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:30,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:50:30,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:30,584 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 01:50:30,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:30,731 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 01:50:30,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:30,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711669825] [2021-11-07 01:50:30,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711669825] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:30,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:30,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:50:30,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661681531] [2021-11-07 01:50:30,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:50:30,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:30,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:50:30,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:50:30,734 INFO L87 Difference]: Start difference. First operand 11461 states and 21693 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:31,639 INFO L93 Difference]: Finished difference Result 22896 states and 43349 transitions. [2021-11-07 01:50:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:50:31,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 01:50:31,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:31,681 INFO L225 Difference]: With dead ends: 22896 [2021-11-07 01:50:31,681 INFO L226 Difference]: Without dead ends: 11461 [2021-11-07 01:50:31,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:50:31,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11461 states. [2021-11-07 01:50:32,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11461 to 11461. [2021-11-07 01:50:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11461 states, 11451 states have (on average 1.893546415160248) internal successors, (21683), 11460 states have internal predecessors, (21683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:32,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11461 states to 11461 states and 21683 transitions. [2021-11-07 01:50:32,262 INFO L78 Accepts]: Start accepts. Automaton has 11461 states and 21683 transitions. Word has length 34 [2021-11-07 01:50:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:32,262 INFO L470 AbstractCegarLoop]: Abstraction has 11461 states and 21683 transitions. [2021-11-07 01:50:32,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 11461 states and 21683 transitions. [2021-11-07 01:50:32,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:50:32,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:32,274 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] [2021-11-07 01:50:32,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:32,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:32,498 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:50:32,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:32,498 INFO L85 PathProgramCache]: Analyzing trace with hash -430731520, now seen corresponding path program 1 times [2021-11-07 01:50:32,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:32,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616885690] [2021-11-07 01:50:32,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:32,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:32,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:32,502 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:32,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:50:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:32,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:50:32,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:33,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:33,298 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 01:50:33,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:33,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616885690] [2021-11-07 01:50:33,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616885690] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:33,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:33,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:50:33,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334379810] [2021-11-07 01:50:33,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:50:33,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:33,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:50:33,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:50:33,301 INFO L87 Difference]: Start difference. First operand 11461 states and 21683 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 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 01:50:40,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:40,393 INFO L93 Difference]: Finished difference Result 51012 states and 96113 transitions. [2021-11-07 01:50:40,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:50:40,393 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 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 38 [2021-11-07 01:50:40,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:40,501 INFO L225 Difference]: With dead ends: 51012 [2021-11-07 01:50:40,502 INFO L226 Difference]: Without dead ends: 39621 [2021-11-07 01:50:40,519 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:50:40,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39621 states. [2021-11-07 01:50:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39621 to 20316. [2021-11-07 01:50:41,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20316 states, 20306 states have (on average 1.892987294395745) internal successors, (38439), 20315 states have internal predecessors, (38439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:41,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20316 states to 20316 states and 38439 transitions. [2021-11-07 01:50:41,565 INFO L78 Accepts]: Start accepts. Automaton has 20316 states and 38439 transitions. Word has length 38 [2021-11-07 01:50:41,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:41,565 INFO L470 AbstractCegarLoop]: Abstraction has 20316 states and 38439 transitions. [2021-11-07 01:50:41,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 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 01:50:41,566 INFO L276 IsEmpty]: Start isEmpty. Operand 20316 states and 38439 transitions. [2021-11-07 01:50:41,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:50:41,567 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:41,567 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] [2021-11-07 01:50:41,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:41,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:41,781 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:50:41,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:41,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1123445477, now seen corresponding path program 1 times [2021-11-07 01:50:41,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:41,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606502168] [2021-11-07 01:50:41,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:41,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:41,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:41,784 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:41,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:50:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:42,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:50:42,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:42,349 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 01:50:42,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:42,490 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 01:50:42,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:42,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606502168] [2021-11-07 01:50:42,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606502168] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:42,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:42,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:50:42,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384637106] [2021-11-07 01:50:42,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:50:42,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:42,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:50:42,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:50:42,496 INFO L87 Difference]: Start difference. First operand 20316 states and 38439 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:49,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:49,694 INFO L93 Difference]: Finished difference Result 171405 states and 324500 transitions. [2021-11-07 01:50:49,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:50:49,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-11-07 01:50:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:50,113 INFO L225 Difference]: With dead ends: 171405 [2021-11-07 01:50:50,113 INFO L226 Difference]: Without dead ends: 151159 [2021-11-07 01:50:50,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:50:50,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151159 states. [2021-11-07 01:50:52,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151159 to 38355. [2021-11-07 01:50:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38355 states, 38345 states have (on average 1.8916416742730473) internal successors, (72535), 38354 states have internal predecessors, (72535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:52,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38355 states to 38355 states and 72535 transitions. [2021-11-07 01:50:52,914 INFO L78 Accepts]: Start accepts. Automaton has 38355 states and 72535 transitions. Word has length 38 [2021-11-07 01:50:52,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:52,917 INFO L470 AbstractCegarLoop]: Abstraction has 38355 states and 72535 transitions. [2021-11-07 01:50:52,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:52,917 INFO L276 IsEmpty]: Start isEmpty. Operand 38355 states and 72535 transitions. [2021-11-07 01:50:52,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 01:50:52,918 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:52,919 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] [2021-11-07 01:50:52,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 01:50:53,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:53,135 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:50:53,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:53,136 INFO L85 PathProgramCache]: Analyzing trace with hash -447043433, now seen corresponding path program 1 times [2021-11-07 01:50:53,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:53,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693002287] [2021-11-07 01:50:53,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:53,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:53,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:53,145 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:53,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:50:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:53,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:50:53,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:53,833 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 01:50:53,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:53,925 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 01:50:53,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:53,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693002287] [2021-11-07 01:50:53,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693002287] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:53,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:53,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:50:53,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579277311] [2021-11-07 01:50:53,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:50:53,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:53,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:50:53,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:53,929 INFO L87 Difference]: Start difference. First operand 38355 states and 72535 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:56,596 INFO L93 Difference]: Finished difference Result 114065 states and 215731 transitions. [2021-11-07 01:50:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:50:56,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-11-07 01:50:56,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:56,930 INFO L225 Difference]: With dead ends: 114065 [2021-11-07 01:50:56,930 INFO L226 Difference]: Without dead ends: 75742 [2021-11-07 01:50:56,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 01:50:57,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75742 states. [2021-11-07 01:50:58,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75742 to 38231. [2021-11-07 01:50:58,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38231 states, 38221 states have (on average 1.8912901284634103) internal successors, (72287), 38230 states have internal predecessors, (72287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:58,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38231 states to 38231 states and 72287 transitions. [2021-11-07 01:50:58,881 INFO L78 Accepts]: Start accepts. Automaton has 38231 states and 72287 transitions. Word has length 39 [2021-11-07 01:50:58,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:58,882 INFO L470 AbstractCegarLoop]: Abstraction has 38231 states and 72287 transitions. [2021-11-07 01:50:58,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:58,882 INFO L276 IsEmpty]: Start isEmpty. Operand 38231 states and 72287 transitions. [2021-11-07 01:50:58,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 01:50:58,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:58,883 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] [2021-11-07 01:50:58,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:59,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:59,083 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:50:59,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:59,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1605600308, now seen corresponding path program 1 times [2021-11-07 01:50:59,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:59,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773966186] [2021-11-07 01:50:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:59,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:59,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:59,086 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:59,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:50:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:59,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:50:59,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:59,607 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 01:50:59,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:59,760 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 01:50:59,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:59,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773966186] [2021-11-07 01:50:59,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773966186] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:59,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:59,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:50:59,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035545908] [2021-11-07 01:50:59,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:50:59,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:59,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:50:59,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:50:59,763 INFO L87 Difference]: Start difference. First operand 38231 states and 72287 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:14,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:14,005 INFO L93 Difference]: Finished difference Result 144418 states and 272775 transitions. [2021-11-07 01:51:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:51:14,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-07 01:51:14,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:14,201 INFO L225 Difference]: With dead ends: 144418 [2021-11-07 01:51:14,202 INFO L226 Difference]: Without dead ends: 106221 [2021-11-07 01:51:14,235 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:51:14,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106221 states. [2021-11-07 01:51:16,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106221 to 74301. [2021-11-07 01:51:16,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74301 states, 74291 states have (on average 1.8745339273936277) internal successors, (139261), 74300 states have internal predecessors, (139261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74301 states to 74301 states and 139261 transitions. [2021-11-07 01:51:16,897 INFO L78 Accepts]: Start accepts. Automaton has 74301 states and 139261 transitions. Word has length 39 [2021-11-07 01:51:16,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:16,898 INFO L470 AbstractCegarLoop]: Abstraction has 74301 states and 139261 transitions. [2021-11-07 01:51:16,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 74301 states and 139261 transitions. [2021-11-07 01:51:16,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 01:51:16,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:16,899 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] [2021-11-07 01:51:16,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:17,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:17,101 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:51:17,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:17,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1617257651, now seen corresponding path program 1 times [2021-11-07 01:51:17,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:17,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198731259] [2021-11-07 01:51:17,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:17,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:17,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:17,106 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:17,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28c7216e-ae15-4a47-8eb9-aae51e8eb920/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:51:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:17,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:51:17,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:17,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:17,666 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 01:51:17,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:17,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198731259] [2021-11-07 01:51:17,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198731259] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:17,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:17,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:51:17,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204170116] [2021-11-07 01:51:17,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:51:17,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:17,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:51:17,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:51:17,668 INFO L87 Difference]: Start difference. First operand 74301 states and 139261 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)