./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product24.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_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/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_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/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_d4eab710-1911-432b-8b09-202ccaf03d12/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 d9a9e332bba43f0e6d965514fc764881b170e0a0500d860d4fcce12986d98914 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:28:01,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:28:01,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:28:01,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:28:01,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:28:01,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:28:01,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:28:01,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:28:01,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:28:01,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:28:01,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:28:01,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:28:01,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:28:01,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:28:01,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:28:01,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:28:01,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:28:01,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:28:01,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:28:01,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:28:01,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:28:01,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:28:01,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:28:01,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:28:01,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:28:01,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:28:01,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:28:01,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:28:01,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:28:01,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:28:01,574 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:28:01,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:28:01,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:28:01,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:28:01,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:28:01,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:28:01,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:28:01,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:28:01,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:28:01,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:28:01,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:28:01,587 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:28:01,648 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:28:01,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:28:01,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:28:01,650 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:28:01,650 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:28:01,650 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:28:01,651 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:28:01,651 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:28:01,651 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:28:01,651 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:28:01,652 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:28:01,652 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:28:01,652 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:28:01,652 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:28:01,653 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:28:01,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:28:01,657 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:28:01,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:28:01,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:28:01,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:28:01,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:28:01,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:28:01,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:28:01,659 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:28:01,659 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:28:01,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:28:01,660 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:28:01,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:28:01,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:28:01,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:28:01,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:28:01,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:28:01,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:28:01,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:28:01,664 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:28:01,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:28:01,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:28:01,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:28:01,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:28:01,667 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_d4eab710-1911-432b-8b09-202ccaf03d12/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9a9e332bba43f0e6d965514fc764881b170e0a0500d860d4fcce12986d98914 [2021-11-07 01:28:02,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:28:02,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:28:02,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:28:02,046 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:28:02,047 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:28:02,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c [2021-11-07 01:28:02,115 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/data/312e6069a/1e87a5e2ad494871abf116ed53676447/FLAG1a1184bfb [2021-11-07 01:28:02,842 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:28:02,843 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c [2021-11-07 01:28:02,869 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/data/312e6069a/1e87a5e2ad494871abf116ed53676447/FLAG1a1184bfb [2021-11-07 01:28:03,055 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/data/312e6069a/1e87a5e2ad494871abf116ed53676447 [2021-11-07 01:28:03,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:28:03,060 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:28:03,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:28:03,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:28:03,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:28:03,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:28:03" (1/1) ... [2021-11-07 01:28:03,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ce9692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:03, skipping insertion in model container [2021-11-07 01:28:03,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:28:03" (1/1) ... [2021-11-07 01:28:03,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:28:03,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:28:03,937 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_d4eab710-1911-432b-8b09-202ccaf03d12/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c[71679,71692] [2021-11-07 01:28:03,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:28:03,953 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 01:28:03,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4cb4202f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:03, skipping insertion in model container [2021-11-07 01:28:03,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:28:03,954 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:28:03,957 INFO L168 Benchmark]: Toolchain (without parser) took 895.18 ms. Allocated memory is still 102.8 MB. Free memory was 68.9 MB in the beginning and 64.9 MB in the end (delta: 4.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:28:03,958 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 102.8 MB. Free memory is still 58.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:28:03,959 INFO L168 Benchmark]: CACSL2BoogieTranslator took 892.06 ms. Allocated memory is still 102.8 MB. Free memory was 68.6 MB in the beginning and 65.3 MB in the end (delta: 3.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:28:03,961 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 102.8 MB. Free memory is still 58.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 892.06 ms. Allocated memory is still 102.8 MB. Free memory was 68.6 MB in the beginning and 65.3 MB in the end (delta: 3.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2802]: 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_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/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_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/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_d4eab710-1911-432b-8b09-202ccaf03d12/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 d9a9e332bba43f0e6d965514fc764881b170e0a0500d860d4fcce12986d98914 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:28:06,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:28:06,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:28:06,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:28:06,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:28:06,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:28:06,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:28:06,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:28:06,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:28:06,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:28:06,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:28:06,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:28:06,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:28:06,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:28:06,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:28:06,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:28:06,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:28:06,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:28:06,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:28:06,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:28:06,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:28:06,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:28:06,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:28:06,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:28:06,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:28:06,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:28:06,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:28:06,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:28:06,606 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:28:06,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:28:06,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:28:06,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:28:06,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:28:06,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:28:06,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:28:06,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:28:06,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:28:06,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:28:06,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:28:06,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:28:06,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:28:06,620 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:28:06,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:28:06,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:28:06,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:28:06,680 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:28:06,681 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:28:06,681 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:28:06,681 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:28:06,681 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:28:06,682 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:28:06,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:28:06,685 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:28:06,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:28:06,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:28:06,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:28:06,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:28:06,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:28:06,686 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:28:06,687 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:28:06,687 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:28:06,687 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:28:06,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:28:06,688 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:28:06,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:28:06,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:28:06,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:28:06,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:28:06,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:28:06,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:28:06,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:28:06,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:28:06,690 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:28:06,690 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:28:06,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:28:06,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:28:06,692 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:28:06,692 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_d4eab710-1911-432b-8b09-202ccaf03d12/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9a9e332bba43f0e6d965514fc764881b170e0a0500d860d4fcce12986d98914 [2021-11-07 01:28:07,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:28:07,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:28:07,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:28:07,162 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:28:07,163 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:28:07,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c [2021-11-07 01:28:07,257 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/data/34d94a775/978e4c23aae047dfa5ca03d614a16548/FLAGf530da150 [2021-11-07 01:28:08,041 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:28:08,047 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c [2021-11-07 01:28:08,072 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/data/34d94a775/978e4c23aae047dfa5ca03d614a16548/FLAGf530da150 [2021-11-07 01:28:08,196 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/data/34d94a775/978e4c23aae047dfa5ca03d614a16548 [2021-11-07 01:28:08,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:28:08,206 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:28:08,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:28:08,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:28:08,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:28:08,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:28:08" (1/1) ... [2021-11-07 01:28:08,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da5ebbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:08, skipping insertion in model container [2021-11-07 01:28:08,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:28:08" (1/1) ... [2021-11-07 01:28:08,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:28:08,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:28:09,038 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_d4eab710-1911-432b-8b09-202ccaf03d12/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c[71679,71692] [2021-11-07 01:28:09,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:28:09,058 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:28:09,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:28:09,226 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_d4eab710-1911-432b-8b09-202ccaf03d12/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c[71679,71692] [2021-11-07 01:28:09,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:28:09,247 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:28:09,371 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_d4eab710-1911-432b-8b09-202ccaf03d12/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c[71679,71692] [2021-11-07 01:28:09,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:28:09,435 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:28:09,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09 WrapperNode [2021-11-07 01:28:09,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:28:09,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:28:09,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:28:09,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:28:09,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (1/1) ... [2021-11-07 01:28:09,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (1/1) ... [2021-11-07 01:28:10,710 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:28:10,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:28:10,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:28:10,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:28:10,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (1/1) ... [2021-11-07 01:28:10,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (1/1) ... [2021-11-07 01:28:11,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (1/1) ... [2021-11-07 01:28:11,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (1/1) ... [2021-11-07 01:28:11,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (1/1) ... [2021-11-07 01:28:12,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (1/1) ... [2021-11-07 01:28:12,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (1/1) ... [2021-11-07 01:28:12,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:28:12,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:28:12,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:28:12,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:28:12,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (1/1) ... [2021-11-07 01:28:12,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:28:12,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:28:12,832 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:28:12,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:28:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:28:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:28:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:28:12,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:28:50,219 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:28:50,220 INFO L299 CfgBuilder]: Removed 3823 assume(true) statements. [2021-11-07 01:28:50,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:28:50 BoogieIcfgContainer [2021-11-07 01:28:50,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:28:50,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:28:50,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:28:50,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:28:50,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:28:08" (1/3) ... [2021-11-07 01:28:50,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a0d8b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:28:50, skipping insertion in model container [2021-11-07 01:28:50,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (2/3) ... [2021-11-07 01:28:50,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a0d8b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:28:50, skipping insertion in model container [2021-11-07 01:28:50,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:28:50" (3/3) ... [2021-11-07 01:28:50,247 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product24.cil.c [2021-11-07 01:28:50,253 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:28:50,253 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:28:50,363 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:28:50,369 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 01:28:50,370 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:28:50,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 16947 states, 16941 states have (on average 1.890030104480255) internal successors, (32019), 16946 states have internal predecessors, (32019), 0 states have call successors, (0), 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 01:28:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:28:50,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:50,878 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] [2021-11-07 01:28:50,878 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:28:50,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:50,894 INFO L85 PathProgramCache]: Analyzing trace with hash -174955907, now seen corresponding path program 1 times [2021-11-07 01:28:50,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:50,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872467967] [2021-11-07 01:28:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:50,910 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:50,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:50,916 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:50,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:28:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:51,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:28:51,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:51,440 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 01:28:51,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:51,531 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 01:28:51,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:51,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872467967] [2021-11-07 01:28:51,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872467967] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:51,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:51,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:28:51,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986827348] [2021-11-07 01:28:51,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:28:51,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:51,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:28:51,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:28:51,606 INFO L87 Difference]: Start difference. First operand has 16947 states, 16941 states have (on average 1.890030104480255) internal successors, (32019), 16946 states have internal predecessors, (32019), 0 states have call successors, (0), 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 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 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 01:28:53,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:53,601 INFO L93 Difference]: Finished difference Result 47506 states and 89753 transitions. [2021-11-07 01:28:53,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:28:53,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 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 27 [2021-11-07 01:28:53,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:53,858 INFO L225 Difference]: With dead ends: 47506 [2021-11-07 01:28:53,859 INFO L226 Difference]: Without dead ends: 30559 [2021-11-07 01:28:53,906 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:28:54,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30559 states. [2021-11-07 01:28:55,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30559 to 16943. [2021-11-07 01:28:55,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16943 states, 16938 states have (on average 1.8891840831266973) internal successors, (31999), 16942 states have internal predecessors, (31999), 0 states have call successors, (0), 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 01:28:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16943 states to 16943 states and 31999 transitions. [2021-11-07 01:28:55,220 INFO L78 Accepts]: Start accepts. Automaton has 16943 states and 31999 transitions. Word has length 27 [2021-11-07 01:28:55,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:55,220 INFO L470 AbstractCegarLoop]: Abstraction has 16943 states and 31999 transitions. [2021-11-07 01:28:55,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 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 01:28:55,221 INFO L276 IsEmpty]: Start isEmpty. Operand 16943 states and 31999 transitions. [2021-11-07 01:28:55,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:28:55,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:55,231 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 01:28:55,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:55,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:55,447 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:28:55,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:55,448 INFO L85 PathProgramCache]: Analyzing trace with hash 977459209, now seen corresponding path program 1 times [2021-11-07 01:28:55,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:55,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291427112] [2021-11-07 01:28:55,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:55,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:55,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:55,453 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:55,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:28:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:56,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:28:56,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:56,229 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 01:28:56,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:56,353 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 01:28:56,354 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:56,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291427112] [2021-11-07 01:28:56,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291427112] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:56,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:56,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:28:56,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591597825] [2021-11-07 01:28:56,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:28:56,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:56,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:28:56,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:28:56,359 INFO L87 Difference]: Start difference. First operand 16943 states and 31999 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 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 01:28:59,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:59,355 INFO L93 Difference]: Finished difference Result 67737 states and 127921 transitions. [2021-11-07 01:28:59,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:28:59,356 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 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 01:28:59,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:59,574 INFO L225 Difference]: With dead ends: 67737 [2021-11-07 01:28:59,574 INFO L226 Difference]: Without dead ends: 50815 [2021-11-07 01:28:59,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:28:59,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50815 states. [2021-11-07 01:29:00,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50815 to 16921. [2021-11-07 01:29:00,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16921 states, 16916 states have (on average 1.8886261527547883) internal successors, (31948), 16920 states have internal predecessors, (31948), 0 states have call successors, (0), 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 01:29:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16921 states to 16921 states and 31948 transitions. [2021-11-07 01:29:00,570 INFO L78 Accepts]: Start accepts. Automaton has 16921 states and 31948 transitions. Word has length 32 [2021-11-07 01:29:00,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:00,571 INFO L470 AbstractCegarLoop]: Abstraction has 16921 states and 31948 transitions. [2021-11-07 01:29:00,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 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 01:29:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 16921 states and 31948 transitions. [2021-11-07 01:29:00,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:29:00,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:00,578 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] [2021-11-07 01:29:00,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:00,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:00,779 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:29:00,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:00,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1400455191, now seen corresponding path program 1 times [2021-11-07 01:29:00,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:00,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738890225] [2021-11-07 01:29:00,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:00,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:00,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:00,788 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:00,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:29:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:01,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:29:01,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:01,270 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 01:29:01,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:01,370 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 01:29:01,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:01,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738890225] [2021-11-07 01:29:01,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738890225] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:01,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:01,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:29:01,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782930441] [2021-11-07 01:29:01,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:29:01,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:01,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:29:01,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:29:01,378 INFO L87 Difference]: Start difference. First operand 16921 states and 31948 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 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 01:29:03,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:03,111 INFO L93 Difference]: Finished difference Result 47365 states and 89441 transitions. [2021-11-07 01:29:03,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:29:03,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 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 33 [2021-11-07 01:29:03,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:03,220 INFO L225 Difference]: With dead ends: 47365 [2021-11-07 01:29:03,221 INFO L226 Difference]: Without dead ends: 30465 [2021-11-07 01:29:03,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:29:03,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30465 states. [2021-11-07 01:29:04,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30465 to 16921. [2021-11-07 01:29:04,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16921 states, 16916 states have (on average 1.8882714589737526) internal successors, (31942), 16920 states have internal predecessors, (31942), 0 states have call successors, (0), 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 01:29:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16921 states to 16921 states and 31942 transitions. [2021-11-07 01:29:04,098 INFO L78 Accepts]: Start accepts. Automaton has 16921 states and 31942 transitions. Word has length 33 [2021-11-07 01:29:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:04,098 INFO L470 AbstractCegarLoop]: Abstraction has 16921 states and 31942 transitions. [2021-11-07 01:29:04,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 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 01:29:04,101 INFO L276 IsEmpty]: Start isEmpty. Operand 16921 states and 31942 transitions. [2021-11-07 01:29:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:29:04,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:04,105 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 01:29:04,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:04,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:04,323 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:29:04,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:04,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2110791356, now seen corresponding path program 1 times [2021-11-07 01:29:04,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:04,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598981432] [2021-11-07 01:29:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:04,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:04,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:04,326 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:04,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:29:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:04,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:29:04,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:04,795 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 01:29:04,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:04,980 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 01:29:04,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:04,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598981432] [2021-11-07 01:29:04,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598981432] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:04,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:04,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:29:04,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612895094] [2021-11-07 01:29:04,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:29:04,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:04,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:29:04,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:29:04,986 INFO L87 Difference]: Start difference. First operand 16921 states and 31942 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:09,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:09,364 INFO L93 Difference]: Finished difference Result 94764 states and 178932 transitions. [2021-11-07 01:29:09,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:29:09,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 01:29:09,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:09,658 INFO L225 Difference]: With dead ends: 94764 [2021-11-07 01:29:09,658 INFO L226 Difference]: Without dead ends: 77867 [2021-11-07 01:29:09,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:29:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77867 states. [2021-11-07 01:29:10,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77867 to 16923. [2021-11-07 01:29:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16923 states, 16918 states have (on average 1.8878709067265633) internal successors, (31939), 16922 states have internal predecessors, (31939), 0 states have call successors, (0), 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 01:29:10,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16923 states to 16923 states and 31939 transitions. [2021-11-07 01:29:10,895 INFO L78 Accepts]: Start accepts. Automaton has 16923 states and 31939 transitions. Word has length 38 [2021-11-07 01:29:10,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:10,896 INFO L470 AbstractCegarLoop]: Abstraction has 16923 states and 31939 transitions. [2021-11-07 01:29:10,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:10,897 INFO L276 IsEmpty]: Start isEmpty. Operand 16923 states and 31939 transitions. [2021-11-07 01:29:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 01:29:10,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:10,898 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 01:29:10,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:11,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:11,113 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:29:11,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:11,113 INFO L85 PathProgramCache]: Analyzing trace with hash -155097142, now seen corresponding path program 1 times [2021-11-07 01:29:11,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:11,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363400521] [2021-11-07 01:29:11,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:11,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:11,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:11,119 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:11,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:29:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:11,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:29:11,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:11,810 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 01:29:11,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:11,989 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 01:29:11,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:11,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363400521] [2021-11-07 01:29:11,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363400521] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:11,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:11,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:29:11,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011606041] [2021-11-07 01:29:11,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:29:11,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:11,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:29:11,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:29:11,993 INFO L87 Difference]: Start difference. First operand 16923 states and 31939 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:16,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:16,164 INFO L93 Difference]: Finished difference Result 53879 states and 101773 transitions. [2021-11-07 01:29:16,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:29:16,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-07 01:29:16,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:16,403 INFO L225 Difference]: With dead ends: 53879 [2021-11-07 01:29:16,404 INFO L226 Difference]: Without dead ends: 40322 [2021-11-07 01:29:16,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:29:16,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40322 states. [2021-11-07 01:29:17,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40322 to 23548. [2021-11-07 01:29:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23548 states, 23543 states have (on average 1.887609905279701) internal successors, (44440), 23547 states have internal predecessors, (44440), 0 states have call successors, (0), 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 01:29:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23548 states to 23548 states and 44440 transitions. [2021-11-07 01:29:17,706 INFO L78 Accepts]: Start accepts. Automaton has 23548 states and 44440 transitions. Word has length 39 [2021-11-07 01:29:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:17,709 INFO L470 AbstractCegarLoop]: Abstraction has 23548 states and 44440 transitions. [2021-11-07 01:29:17,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 23548 states and 44440 transitions. [2021-11-07 01:29:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:29:17,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:17,716 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:17,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 01:29:17,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:17,931 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:29:17,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:17,932 INFO L85 PathProgramCache]: Analyzing trace with hash 617069500, now seen corresponding path program 1 times [2021-11-07 01:29:17,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:17,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659843320] [2021-11-07 01:29:17,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:17,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:17,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:17,935 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:17,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:29:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:18,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:29:18,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:18,558 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 01:29:18,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:18,752 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 01:29:18,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:18,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659843320] [2021-11-07 01:29:18,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659843320] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:18,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:18,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:29:18,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307613536] [2021-11-07 01:29:18,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:29:18,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:18,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:29:18,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:29:18,754 INFO L87 Difference]: Start difference. First operand 23548 states and 44440 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:25,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:25,039 INFO L93 Difference]: Finished difference Result 49452 states and 92986 transitions. [2021-11-07 01:29:25,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:29:25,039 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:29:25,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:25,082 INFO L225 Difference]: With dead ends: 49452 [2021-11-07 01:29:25,083 INFO L226 Difference]: Without dead ends: 29130 [2021-11-07 01:29:25,107 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:29:25,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29130 states. [2021-11-07 01:29:26,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29130 to 28402. [2021-11-07 01:29:26,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28402 states, 28397 states have (on average 1.8811846321794556) internal successors, (53420), 28401 states have internal predecessors, (53420), 0 states have call successors, (0), 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 01:29:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28402 states to 28402 states and 53420 transitions. [2021-11-07 01:29:26,576 INFO L78 Accepts]: Start accepts. Automaton has 28402 states and 53420 transitions. Word has length 58 [2021-11-07 01:29:26,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:26,577 INFO L470 AbstractCegarLoop]: Abstraction has 28402 states and 53420 transitions. [2021-11-07 01:29:26,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:26,577 INFO L276 IsEmpty]: Start isEmpty. Operand 28402 states and 53420 transitions. [2021-11-07 01:29:26,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:29:26,589 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:26,590 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:26,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:26,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:26,806 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:29:26,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:26,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1188368834, now seen corresponding path program 1 times [2021-11-07 01:29:26,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:26,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362594059] [2021-11-07 01:29:26,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:26,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:26,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:26,814 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:26,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:29:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:27,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:29:27,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:27,696 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 01:29:27,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:27,991 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:27,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362594059] [2021-11-07 01:29:27,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362594059] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:27,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:27,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:29:27,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079562051] [2021-11-07 01:29:27,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:29:27,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:27,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:29:27,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:29:27,994 INFO L87 Difference]: Start difference. First operand 28402 states and 53420 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 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 01:29:29,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:29,143 INFO L93 Difference]: Finished difference Result 45540 states and 85533 transitions. [2021-11-07 01:29:29,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:29:29,144 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:29:29,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:29,167 INFO L225 Difference]: With dead ends: 45540 [2021-11-07 01:29:29,167 INFO L226 Difference]: Without dead ends: 19126 [2021-11-07 01:29:29,185 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 108 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 01:29:29,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19126 states. [2021-11-07 01:29:30,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19126 to 18259. [2021-11-07 01:29:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18259 states, 18254 states have (on average 1.8849019393009752) internal successors, (34407), 18258 states have internal predecessors, (34407), 0 states have call successors, (0), 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 01:29:30,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18259 states to 18259 states and 34407 transitions. [2021-11-07 01:29:30,172 INFO L78 Accepts]: Start accepts. Automaton has 18259 states and 34407 transitions. Word has length 58 [2021-11-07 01:29:30,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:30,172 INFO L470 AbstractCegarLoop]: Abstraction has 18259 states and 34407 transitions. [2021-11-07 01:29:30,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 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 01:29:30,173 INFO L276 IsEmpty]: Start isEmpty. Operand 18259 states and 34407 transitions. [2021-11-07 01:29:30,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:29:30,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:30,177 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:30,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:30,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:30,393 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:29:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:30,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2062438738, now seen corresponding path program 1 times [2021-11-07 01:29:30,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:30,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160843256] [2021-11-07 01:29:30,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:30,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:30,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:30,402 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:30,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:29:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:30,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:29:30,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:31,072 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 01:29:31,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:31,259 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 01:29:31,259 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:31,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160843256] [2021-11-07 01:29:31,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160843256] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:31,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:31,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:29:31,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346518629] [2021-11-07 01:29:31,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:29:31,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:31,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:29:31,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:29:31,263 INFO L87 Difference]: Start difference. First operand 18259 states and 34407 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:45,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:45,516 INFO L93 Difference]: Finished difference Result 63270 states and 119479 transitions. [2021-11-07 01:29:45,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:29:45,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:29:45,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:45,576 INFO L225 Difference]: With dead ends: 63270 [2021-11-07 01:29:45,576 INFO L226 Difference]: Without dead ends: 45044 [2021-11-07 01:29:45,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:29:45,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45044 states. [2021-11-07 01:29:46,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45044 to 18259. [2021-11-07 01:29:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18259 states, 18254 states have (on average 1.8247507395639313) internal successors, (33309), 18258 states have internal predecessors, (33309), 0 states have call successors, (0), 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 01:29:46,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18259 states to 18259 states and 33309 transitions. [2021-11-07 01:29:46,490 INFO L78 Accepts]: Start accepts. Automaton has 18259 states and 33309 transitions. Word has length 59 [2021-11-07 01:29:46,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:46,491 INFO L470 AbstractCegarLoop]: Abstraction has 18259 states and 33309 transitions. [2021-11-07 01:29:46,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:46,491 INFO L276 IsEmpty]: Start isEmpty. Operand 18259 states and 33309 transitions. [2021-11-07 01:29:46,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:29:46,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:46,494 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:46,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:46,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:46,698 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:29:46,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:46,699 INFO L85 PathProgramCache]: Analyzing trace with hash -676991268, now seen corresponding path program 1 times [2021-11-07 01:29:46,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:46,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812911413] [2021-11-07 01:29:46,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:46,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:46,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:46,701 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:46,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:29:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:47,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:29:47,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:47,552 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 01:29:47,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:47,796 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 01:29:47,797 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:47,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812911413] [2021-11-07 01:29:47,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812911413] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:47,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:47,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:29:47,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474773612] [2021-11-07 01:29:47,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:29:47,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:47,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:29:47,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:29:47,800 INFO L87 Difference]: Start difference. First operand 18259 states and 33309 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:00,930 INFO L93 Difference]: Finished difference Result 87581 states and 162111 transitions. [2021-11-07 01:30:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:30:00,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:30:00,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:01,181 INFO L225 Difference]: With dead ends: 87581 [2021-11-07 01:30:01,181 INFO L226 Difference]: Without dead ends: 69382 [2021-11-07 01:30:01,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:30:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69382 states. [2021-11-07 01:30:02,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69382 to 26121. [2021-11-07 01:30:02,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26121 states, 26116 states have (on average 1.8250880686169397) internal successors, (47664), 26120 states have internal predecessors, (47664), 0 states have call successors, (0), 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 01:30:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26121 states to 26121 states and 47664 transitions. [2021-11-07 01:30:02,493 INFO L78 Accepts]: Start accepts. Automaton has 26121 states and 47664 transitions. Word has length 71 [2021-11-07 01:30:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:02,493 INFO L470 AbstractCegarLoop]: Abstraction has 26121 states and 47664 transitions. [2021-11-07 01:30:02,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand 26121 states and 47664 transitions. [2021-11-07 01:30:02,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:30:02,498 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:02,498 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:02,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:02,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:02,702 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:30:02,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:02,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1195159483, now seen corresponding path program 1 times [2021-11-07 01:30:02,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:02,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280704755] [2021-11-07 01:30:02,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:02,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:02,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:02,707 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:02,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:30:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:03,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:30:03,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:03,793 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 01:30:03,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:05,521 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 01:30:05,521 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:05,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280704755] [2021-11-07 01:30:05,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280704755] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:05,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:05,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:30:05,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171786651] [2021-11-07 01:30:05,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:30:05,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:05,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:30:05,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:30:05,524 INFO L87 Difference]: Start difference. First operand 26121 states and 47664 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 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 01:30:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:15,764 INFO L93 Difference]: Finished difference Result 90100 states and 164171 transitions. [2021-11-07 01:30:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:30:15,765 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:30:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:15,874 INFO L225 Difference]: With dead ends: 90100 [2021-11-07 01:30:15,874 INFO L226 Difference]: Without dead ends: 64031 [2021-11-07 01:30:15,897 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:30:15,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64031 states. [2021-11-07 01:30:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64031 to 39222. [2021-11-07 01:30:17,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39222 states, 39217 states have (on average 1.8093173878675064) internal successors, (70956), 39221 states have internal predecessors, (70956), 0 states have call successors, (0), 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 01:30:17,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39222 states to 39222 states and 70956 transitions. [2021-11-07 01:30:17,734 INFO L78 Accepts]: Start accepts. Automaton has 39222 states and 70956 transitions. Word has length 74 [2021-11-07 01:30:17,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:17,735 INFO L470 AbstractCegarLoop]: Abstraction has 39222 states and 70956 transitions. [2021-11-07 01:30:17,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 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 01:30:17,736 INFO L276 IsEmpty]: Start isEmpty. Operand 39222 states and 70956 transitions. [2021-11-07 01:30:17,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:30:17,740 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:17,741 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:17,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:17,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:17,959 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:30:17,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:17,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1525935120, now seen corresponding path program 1 times [2021-11-07 01:30:17,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:17,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002792386] [2021-11-07 01:30:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:17,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:17,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:17,962 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:17,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:30:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:18,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:30:18,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:18,890 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 01:30:18,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:19,178 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 01:30:19,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:19,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002792386] [2021-11-07 01:30:19,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002792386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:19,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:19,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:30:19,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837845049] [2021-11-07 01:30:19,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:30:19,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:19,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:30:19,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:30:19,180 INFO L87 Difference]: Start difference. First operand 39222 states and 70956 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:40,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:40,991 INFO L93 Difference]: Finished difference Result 192418 states and 350908 transitions. [2021-11-07 01:30:40,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:30:40,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:30:40,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:41,442 INFO L225 Difference]: With dead ends: 192418 [2021-11-07 01:30:41,442 INFO L226 Difference]: Without dead ends: 153247 [2021-11-07 01:30:41,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 145 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 01:30:41,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153247 states. [2021-11-07 01:30:44,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153247 to 52016. [2021-11-07 01:30:44,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52016 states, 52011 states have (on average 1.8075599392436215) internal successors, (94013), 52015 states have internal predecessors, (94013), 0 states have call successors, (0), 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 01:30:44,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52016 states to 52016 states and 94013 transitions. [2021-11-07 01:30:44,260 INFO L78 Accepts]: Start accepts. Automaton has 52016 states and 94013 transitions. Word has length 75 [2021-11-07 01:30:44,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:44,260 INFO L470 AbstractCegarLoop]: Abstraction has 52016 states and 94013 transitions. [2021-11-07 01:30:44,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 52016 states and 94013 transitions. [2021-11-07 01:30:44,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:30:44,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:44,264 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:44,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:44,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:44,470 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:30:44,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:44,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1745995485, now seen corresponding path program 1 times [2021-11-07 01:30:44,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:44,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925682445] [2021-11-07 01:30:44,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:44,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:44,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:44,474 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:44,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:30:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:45,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:30:45,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:45,410 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 01:30:45,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:45,693 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 01:30:45,693 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:45,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925682445] [2021-11-07 01:30:45,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925682445] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:45,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:45,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:45,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563385952] [2021-11-07 01:30:45,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:30:45,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:45,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:30:45,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:30:45,696 INFO L87 Difference]: Start difference. First operand 52016 states and 94013 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:05,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:05,582 INFO L93 Difference]: Finished difference Result 160677 states and 293756 transitions. [2021-11-07 01:31:05,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:31:05,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:31:05,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:05,825 INFO L225 Difference]: With dead ends: 160677 [2021-11-07 01:31:05,825 INFO L226 Difference]: Without dead ends: 108699 [2021-11-07 01:31:05,880 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:31:06,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108699 states. [2021-11-07 01:31:09,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108699 to 68810. [2021-11-07 01:31:10,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68810 states, 68805 states have (on average 1.7676622338492842) internal successors, (121624), 68809 states have internal predecessors, (121624), 0 states have call successors, (0), 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 01:31:10,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68810 states to 68810 states and 121624 transitions. [2021-11-07 01:31:10,173 INFO L78 Accepts]: Start accepts. Automaton has 68810 states and 121624 transitions. Word has length 76 [2021-11-07 01:31:10,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:10,173 INFO L470 AbstractCegarLoop]: Abstraction has 68810 states and 121624 transitions. [2021-11-07 01:31:10,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:10,174 INFO L276 IsEmpty]: Start isEmpty. Operand 68810 states and 121624 transitions. [2021-11-07 01:31:10,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:31:10,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:10,176 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:10,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:10,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:10,377 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:31:10,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:10,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1915456101, now seen corresponding path program 1 times [2021-11-07 01:31:10,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:10,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558321118] [2021-11-07 01:31:10,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:10,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:10,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:10,380 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:10,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4eab710-1911-432b-8b09-202ccaf03d12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:31:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:11,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:31:11,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:11,644 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 01:31:11,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:11,917 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 01:31:11,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:11,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558321118] [2021-11-07 01:31:11,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558321118] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:11,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:11,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:31:11,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539566926] [2021-11-07 01:31:11,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:31:11,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:11,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:31:11,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:31:11,920 INFO L87 Difference]: Start difference. First operand 68810 states and 121624 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)