./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product26.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_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/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_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/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_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/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 d5d3c0f581b3d52ccfb3e43d6fb6458a66cd40c307750c0d7336040b60b78e76 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:09:39,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:09:39,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:09:39,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:09:39,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:09:39,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:09:39,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:09:39,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:09:39,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:09:39,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:09:39,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:09:39,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:09:39,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:09:39,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:09:39,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:09:39,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:09:39,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:09:39,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:09:39,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:09:39,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:09:39,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:09:39,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:09:39,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:09:39,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:09:39,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:09:39,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:09:39,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:09:39,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:09:39,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:09:39,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:09:39,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:09:39,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:09:39,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:09:39,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:09:39,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:09:39,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:09:39,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:09:39,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:09:39,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:09:39,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:09:39,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:09:39,337 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:09:39,386 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:09:39,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:09:39,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:09:39,388 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:09:39,388 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:09:39,388 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:09:39,388 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:09:39,388 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:09:39,389 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:09:39,389 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:09:39,390 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:09:39,390 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:09:39,391 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:09:39,391 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:09:39,391 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:09:39,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:09:39,392 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:09:39,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:09:39,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:09:39,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:09:39,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:09:39,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:09:39,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:09:39,393 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:09:39,393 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:09:39,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:09:39,394 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:09:39,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:09:39,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:09:39,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:09:39,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:09:39,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:09:39,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:09:39,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:09:39,396 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:09:39,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:09:39,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:09:39,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:09:39,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:09:39,397 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_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5d3c0f581b3d52ccfb3e43d6fb6458a66cd40c307750c0d7336040b60b78e76 [2021-11-07 01:09:39,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:09:39,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:09:39,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:09:39,697 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:09:39,698 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:09:39,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2021-11-07 01:09:39,759 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/data/3172f69bc/5c9d2194eaaa4840ae57cbcda97ed036/FLAG57dd91f75 [2021-11-07 01:09:40,447 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:09:40,450 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2021-11-07 01:09:40,473 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/data/3172f69bc/5c9d2194eaaa4840ae57cbcda97ed036/FLAG57dd91f75 [2021-11-07 01:09:40,596 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/data/3172f69bc/5c9d2194eaaa4840ae57cbcda97ed036 [2021-11-07 01:09:40,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:09:40,603 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:09:40,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:40,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:09:40,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:09:40,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:40" (1/1) ... [2021-11-07 01:09:40,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66b35ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:40, skipping insertion in model container [2021-11-07 01:09:40,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:40" (1/1) ... [2021-11-07 01:09:40,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:09:40,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:09:41,270 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_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c[46529,46542] [2021-11-07 01:09:41,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:41,354 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 01:09:41,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@eff862b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:41, skipping insertion in model container [2021-11-07 01:09:41,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:41,355 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:09:41,357 INFO L168 Benchmark]: Toolchain (without parser) took 753.65 ms. Allocated memory is still 119.5 MB. Free memory was 76.4 MB in the beginning and 77.2 MB in the end (delta: -737.4 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:09:41,358 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 119.5 MB. Free memory was 96.1 MB in the beginning and 96.0 MB in the end (delta: 67.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:09:41,359 INFO L168 Benchmark]: CACSL2BoogieTranslator took 750.19 ms. Allocated memory is still 119.5 MB. Free memory was 76.3 MB in the beginning and 77.2 MB in the end (delta: -873.8 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:09:41,361 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 119.5 MB. Free memory was 96.1 MB in the beginning and 96.0 MB in the end (delta: 67.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 750.19 ms. Allocated memory is still 119.5 MB. Free memory was 76.3 MB in the beginning and 77.2 MB in the end (delta: -873.8 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/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_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/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_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/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 d5d3c0f581b3d52ccfb3e43d6fb6458a66cd40c307750c0d7336040b60b78e76 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:09:43,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:09:43,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:09:43,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:09:43,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:09:43,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:09:43,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:09:43,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:09:43,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:09:43,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:09:43,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:09:43,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:09:43,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:09:43,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:09:43,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:09:43,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:09:43,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:09:43,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:09:43,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:09:43,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:09:43,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:09:43,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:09:43,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:09:43,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:09:43,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:09:43,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:09:43,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:09:43,736 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:09:43,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:09:43,737 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:09:43,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:09:43,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:09:43,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:09:43,762 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:09:43,764 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:09:43,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:09:43,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:09:43,766 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:09:43,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:09:43,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:09:43,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:09:43,773 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:09:43,820 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:09:43,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:09:43,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:09:43,822 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:09:43,823 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:09:43,823 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:09:43,823 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:09:43,823 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:09:43,824 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:09:43,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:09:43,826 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:09:43,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:09:43,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:09:43,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:09:43,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:09:43,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:09:43,828 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:09:43,828 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:09:43,828 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:09:43,829 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:09:43,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:09:43,829 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:09:43,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:09:43,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:09:43,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:09:43,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:09:43,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:09:43,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:09:43,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:09:43,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:09:43,831 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:09:43,831 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:09:43,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:09:43,832 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:09:43,832 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:09:43,833 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_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5d3c0f581b3d52ccfb3e43d6fb6458a66cd40c307750c0d7336040b60b78e76 [2021-11-07 01:09:44,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:09:44,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:09:44,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:09:44,341 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:09:44,342 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:09:44,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2021-11-07 01:09:44,428 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/data/1d79c72aa/3eb10781de824b30999ccd7d4ce9480f/FLAGda11b9ec9 [2021-11-07 01:09:45,250 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:09:45,250 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2021-11-07 01:09:45,282 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/data/1d79c72aa/3eb10781de824b30999ccd7d4ce9480f/FLAGda11b9ec9 [2021-11-07 01:09:45,420 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/data/1d79c72aa/3eb10781de824b30999ccd7d4ce9480f [2021-11-07 01:09:45,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:09:45,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:09:45,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:45,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:09:45,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:09:45,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:45" (1/1) ... [2021-11-07 01:09:45,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c7456f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:45, skipping insertion in model container [2021-11-07 01:09:45,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:45" (1/1) ... [2021-11-07 01:09:45,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:09:45,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:09:46,130 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_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c[46529,46542] [2021-11-07 01:09:46,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:46,284 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:09:46,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:09:46,438 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_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c[46529,46542] [2021-11-07 01:09:46,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:46,469 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:09:46,558 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_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c[46529,46542] [2021-11-07 01:09:46,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:46,620 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:09:46,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:46 WrapperNode [2021-11-07 01:09:46,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:46,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:09:46,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:09:46,630 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:09:46,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:46" (1/1) ... [2021-11-07 01:09:46,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:46" (1/1) ... [2021-11-07 01:09:47,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:09:47,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:09:47,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:09:47,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:09:47,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:46" (1/1) ... [2021-11-07 01:09:47,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:46" (1/1) ... [2021-11-07 01:09:47,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:46" (1/1) ... [2021-11-07 01:09:47,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:46" (1/1) ... [2021-11-07 01:09:47,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:46" (1/1) ... [2021-11-07 01:09:47,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:46" (1/1) ... [2021-11-07 01:09:47,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:46" (1/1) ... [2021-11-07 01:09:47,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:09:47,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:09:47,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:09:47,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:09:47,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:46" (1/1) ... [2021-11-07 01:09:47,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:09:47,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:09:47,716 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:09:47,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:09:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:09:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:09:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:09:47,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:10:01,487 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:10:01,487 INFO L299 CfgBuilder]: Removed 1113 assume(true) statements. [2021-11-07 01:10:01,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:10:01 BoogieIcfgContainer [2021-11-07 01:10:01,495 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:10:01,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:10:01,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:10:01,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:10:01,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:09:45" (1/3) ... [2021-11-07 01:10:01,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61eaa7f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:10:01, skipping insertion in model container [2021-11-07 01:10:01,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:46" (2/3) ... [2021-11-07 01:10:01,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61eaa7f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:10:01, skipping insertion in model container [2021-11-07 01:10:01,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:10:01" (3/3) ... [2021-11-07 01:10:01,504 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product26.cil.c [2021-11-07 01:10:01,509 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:10:01,510 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:10:01,594 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:10:01,602 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 01:10:01,602 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:10:01,715 INFO L276 IsEmpty]: Start isEmpty. Operand has 4860 states, 4854 states have (on average 1.8951380304903174) internal successors, (9199), 4859 states have internal predecessors, (9199), 0 states have call successors, (0), 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 01:10:01,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 01:10:01,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:01,725 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] [2021-11-07 01:10:01,726 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 01:10:01,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:01,731 INFO L85 PathProgramCache]: Analyzing trace with hash -4419781, now seen corresponding path program 1 times [2021-11-07 01:10:01,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:01,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213081380] [2021-11-07 01:10:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:01,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:01,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:01,753 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:01,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:10:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:02,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:10:02,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:02,285 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 01:10:02,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:02,338 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 01:10:02,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:02,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213081380] [2021-11-07 01:10:02,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213081380] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:02,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:02,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:10:02,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211464532] [2021-11-07 01:10:02,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:10:02,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:02,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:10:02,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:10:02,383 INFO L87 Difference]: Start difference. First operand has 4860 states, 4854 states have (on average 1.8951380304903174) internal successors, (9199), 4859 states have internal predecessors, (9199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 01:10:02,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:02,593 INFO L93 Difference]: Finished difference Result 4879 states and 9222 transitions. [2021-11-07 01:10:02,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:10:02,595 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-11-07 01:10:02,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:02,655 INFO L225 Difference]: With dead ends: 4879 [2021-11-07 01:10:02,655 INFO L226 Difference]: Without dead ends: 4856 [2021-11-07 01:10:02,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:10:02,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2021-11-07 01:10:02,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4856. [2021-11-07 01:10:02,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4856 states, 4851 states have (on average 1.893836322407751) internal successors, (9187), 4855 states have internal predecessors, (9187), 0 states have call successors, (0), 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 01:10:02,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 9187 transitions. [2021-11-07 01:10:02,924 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 9187 transitions. Word has length 26 [2021-11-07 01:10:02,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:02,925 INFO L470 AbstractCegarLoop]: Abstraction has 4856 states and 9187 transitions. [2021-11-07 01:10:02,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 01:10:02,925 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 9187 transitions. [2021-11-07 01:10:02,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 01:10:02,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:02,929 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] [2021-11-07 01:10:02,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:03,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:03,156 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 01:10:03,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:03,157 INFO L85 PathProgramCache]: Analyzing trace with hash -308036790, now seen corresponding path program 1 times [2021-11-07 01:10:03,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:03,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789201910] [2021-11-07 01:10:03,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:03,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:03,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:03,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:03,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:10:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:03,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:10:03,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:03,703 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 01:10:03,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:03,805 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 01:10:03,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:03,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789201910] [2021-11-07 01:10:03,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789201910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:03,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:03,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:10:03,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195817230] [2021-11-07 01:10:03,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:03,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:03,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:03,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:03,814 INFO L87 Difference]: Start difference. First operand 4856 states and 9187 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 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 01:10:04,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:04,113 INFO L93 Difference]: Finished difference Result 9699 states and 18355 transitions. [2021-11-07 01:10:04,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:04,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 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 28 [2021-11-07 01:10:04,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:04,147 INFO L225 Difference]: With dead ends: 9699 [2021-11-07 01:10:04,147 INFO L226 Difference]: Without dead ends: 4856 [2021-11-07 01:10:04,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 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 01:10:04,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2021-11-07 01:10:04,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4856. [2021-11-07 01:10:04,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4856 states, 4851 states have (on average 1.8925994640280355) internal successors, (9181), 4855 states have internal predecessors, (9181), 0 states have call successors, (0), 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 01:10:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 9181 transitions. [2021-11-07 01:10:04,339 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 9181 transitions. Word has length 28 [2021-11-07 01:10:04,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:04,339 INFO L470 AbstractCegarLoop]: Abstraction has 4856 states and 9181 transitions. [2021-11-07 01:10:04,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 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 01:10:04,340 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 9181 transitions. [2021-11-07 01:10:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:10:04,342 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:04,342 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 01:10:04,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:10:04,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:04,555 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 01:10:04,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:04,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1766352340, now seen corresponding path program 1 times [2021-11-07 01:10:04,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:04,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067085251] [2021-11-07 01:10:04,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:04,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:04,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:04,565 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:04,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:10:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:04,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:10:04,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:05,020 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 01:10:05,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:05,106 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 01:10:05,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:05,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067085251] [2021-11-07 01:10:05,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067085251] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:05,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:05,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:10:05,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317119721] [2021-11-07 01:10:05,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:05,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:05,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:05,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:05,110 INFO L87 Difference]: Start difference. First operand 4856 states and 9181 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 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 01:10:05,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:05,548 INFO L93 Difference]: Finished difference Result 9663 states and 18278 transitions. [2021-11-07 01:10:05,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:05,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 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 01:10:05,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:05,581 INFO L225 Difference]: With dead ends: 9663 [2021-11-07 01:10:05,581 INFO L226 Difference]: Without dead ends: 4829 [2021-11-07 01:10:05,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:10:05,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2021-11-07 01:10:05,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2021-11-07 01:10:05,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4824 states have (on average 1.8915837479270314) internal successors, (9125), 4828 states have internal predecessors, (9125), 0 states have call successors, (0), 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 01:10:05,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 9125 transitions. [2021-11-07 01:10:05,778 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 9125 transitions. Word has length 33 [2021-11-07 01:10:05,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:05,779 INFO L470 AbstractCegarLoop]: Abstraction has 4829 states and 9125 transitions. [2021-11-07 01:10:05,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 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 01:10:05,779 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 9125 transitions. [2021-11-07 01:10:05,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:10:05,780 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:05,781 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:05,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:05,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:05,994 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 01:10:05,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:05,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1940850698, now seen corresponding path program 1 times [2021-11-07 01:10:05,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:05,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769411869] [2021-11-07 01:10:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:05,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:05,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:05,997 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:06,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:10:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:06,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:10:06,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:06,459 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 01:10:06,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:06,554 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 01:10:06,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:06,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769411869] [2021-11-07 01:10:06,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769411869] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:06,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:06,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:10:06,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953471727] [2021-11-07 01:10:06,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:06,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:06,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:06,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:06,558 INFO L87 Difference]: Start difference. First operand 4829 states and 9125 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:06,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:06,814 INFO L93 Difference]: Finished difference Result 9636 states and 18222 transitions. [2021-11-07 01:10:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:06,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 01:10:06,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:06,847 INFO L225 Difference]: With dead ends: 9636 [2021-11-07 01:10:06,847 INFO L226 Difference]: Without dead ends: 4829 [2021-11-07 01:10:06,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 64 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 01:10:06,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2021-11-07 01:10:07,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2021-11-07 01:10:07,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4824 states have (on average 1.890339966832504) internal successors, (9119), 4828 states have internal predecessors, (9119), 0 states have call successors, (0), 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 01:10:07,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 9119 transitions. [2021-11-07 01:10:07,148 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 9119 transitions. Word has length 34 [2021-11-07 01:10:07,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:07,149 INFO L470 AbstractCegarLoop]: Abstraction has 4829 states and 9119 transitions. [2021-11-07 01:10:07,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:07,150 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 9119 transitions. [2021-11-07 01:10:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 01:10:07,154 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:07,155 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 01:10:07,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:07,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:07,368 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 01:10:07,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:07,369 INFO L85 PathProgramCache]: Analyzing trace with hash -838445753, now seen corresponding path program 1 times [2021-11-07 01:10:07,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:07,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000940564] [2021-11-07 01:10:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:07,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:07,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:07,372 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:07,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:10:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:07,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:10:07,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:07,918 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 01:10:07,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:08,064 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 01:10:08,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:08,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000940564] [2021-11-07 01:10:08,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000940564] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:08,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:08,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:10:08,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452741918] [2021-11-07 01:10:08,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:10:08,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:08,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:10:08,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:10:08,067 INFO L87 Difference]: Start difference. First operand 4829 states and 9119 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:08,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:08,493 INFO L93 Difference]: Finished difference Result 9630 states and 18205 transitions. [2021-11-07 01:10:08,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:10:08,494 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-07 01:10:08,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:08,539 INFO L225 Difference]: With dead ends: 9630 [2021-11-07 01:10:08,539 INFO L226 Difference]: Without dead ends: 4826 [2021-11-07 01:10:08,547 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:10:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-11-07 01:10:08,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2021-11-07 01:10:08,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4821 states have (on average 1.8898568761667704) internal successors, (9111), 4825 states have internal predecessors, (9111), 0 states have call successors, (0), 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 01:10:08,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 9111 transitions. [2021-11-07 01:10:08,813 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 9111 transitions. Word has length 39 [2021-11-07 01:10:08,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:08,814 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 9111 transitions. [2021-11-07 01:10:08,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 9111 transitions. [2021-11-07 01:10:08,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 01:10:08,816 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:08,816 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] [2021-11-07 01:10:08,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:09,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:09,030 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 01:10:09,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:09,030 INFO L85 PathProgramCache]: Analyzing trace with hash -613413097, now seen corresponding path program 1 times [2021-11-07 01:10:09,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:09,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819207683] [2021-11-07 01:10:09,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:09,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:09,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:09,033 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:09,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:10:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:09,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:10:09,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:09,723 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 01:10:09,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:09,882 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 01:10:09,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:09,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819207683] [2021-11-07 01:10:09,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819207683] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:09,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:09,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:10:09,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269531793] [2021-11-07 01:10:09,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:09,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:09,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:09,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:09,884 INFO L87 Difference]: Start difference. First operand 4826 states and 9111 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:10,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:10,732 INFO L93 Difference]: Finished difference Result 13250 states and 25078 transitions. [2021-11-07 01:10:10,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:10,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 01:10:10,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:10,764 INFO L225 Difference]: With dead ends: 13250 [2021-11-07 01:10:10,764 INFO L226 Difference]: Without dead ends: 10795 [2021-11-07 01:10:10,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 76 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 01:10:10,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10795 states. [2021-11-07 01:10:11,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10795 to 6386. [2021-11-07 01:10:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6386 states, 6381 states have (on average 1.8920231938567622) internal successors, (12073), 6385 states have internal predecessors, (12073), 0 states have call successors, (0), 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 01:10:11,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6386 states to 6386 states and 12073 transitions. [2021-11-07 01:10:11,163 INFO L78 Accepts]: Start accepts. Automaton has 6386 states and 12073 transitions. Word has length 40 [2021-11-07 01:10:11,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:11,163 INFO L470 AbstractCegarLoop]: Abstraction has 6386 states and 12073 transitions. [2021-11-07 01:10:11,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:11,164 INFO L276 IsEmpty]: Start isEmpty. Operand 6386 states and 12073 transitions. [2021-11-07 01:10:11,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:10:11,168 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:11,168 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:11,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 01:10:11,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:11,384 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 01:10:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:11,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1747046172, now seen corresponding path program 1 times [2021-11-07 01:10:11,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:11,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78221312] [2021-11-07 01:10:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:11,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:11,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:11,392 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:11,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:10:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:11,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:10:11,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:12,097 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 01:10:12,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:12,325 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 01:10:12,325 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:12,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78221312] [2021-11-07 01:10:12,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78221312] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:12,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:12,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:10:12,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379269582] [2021-11-07 01:10:12,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:10:12,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:12,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:10:12,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:10:12,328 INFO L87 Difference]: Start difference. First operand 6386 states and 12073 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:13,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:13,082 INFO L93 Difference]: Finished difference Result 12156 states and 22782 transitions. [2021-11-07 01:10:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:10:13,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:10:13,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:13,104 INFO L225 Difference]: With dead ends: 12156 [2021-11-07 01:10:13,104 INFO L226 Difference]: Without dead ends: 6989 [2021-11-07 01:10:13,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:10:13,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6989 states. [2021-11-07 01:10:13,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6989 to 4741. [2021-11-07 01:10:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4741 states, 4736 states have (on average 1.8855574324324325) internal successors, (8930), 4740 states have internal predecessors, (8930), 0 states have call successors, (0), 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 01:10:13,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4741 states to 4741 states and 8930 transitions. [2021-11-07 01:10:13,406 INFO L78 Accepts]: Start accepts. Automaton has 4741 states and 8930 transitions. Word has length 53 [2021-11-07 01:10:13,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:13,407 INFO L470 AbstractCegarLoop]: Abstraction has 4741 states and 8930 transitions. [2021-11-07 01:10:13,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 4741 states and 8930 transitions. [2021-11-07 01:10:13,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:10:13,412 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:13,412 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:13,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:13,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:13,627 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 01:10:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:13,628 INFO L85 PathProgramCache]: Analyzing trace with hash 237412071, now seen corresponding path program 1 times [2021-11-07 01:10:13,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:13,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773570636] [2021-11-07 01:10:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:13,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:13,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:13,633 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:13,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:10:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:14,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:10:14,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:14,421 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 01:10:14,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:14,628 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 01:10:14,628 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:14,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773570636] [2021-11-07 01:10:14,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773570636] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:14,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:14,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:10:14,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581666662] [2021-11-07 01:10:14,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:10:14,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:14,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:10:14,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:10:14,631 INFO L87 Difference]: Start difference. First operand 4741 states and 8930 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:17,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:17,997 INFO L93 Difference]: Finished difference Result 19060 states and 35858 transitions. [2021-11-07 01:10:17,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:10:17,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:10:18,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:18,049 INFO L225 Difference]: With dead ends: 19060 [2021-11-07 01:10:18,049 INFO L226 Difference]: Without dead ends: 14362 [2021-11-07 01:10:18,063 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:10:18,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14362 states. [2021-11-07 01:10:18,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14362 to 4749. [2021-11-07 01:10:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4749 states, 4744 states have (on average 1.8840640809443507) internal successors, (8938), 4748 states have internal predecessors, (8938), 0 states have call successors, (0), 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 01:10:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4749 states to 4749 states and 8938 transitions. [2021-11-07 01:10:18,581 INFO L78 Accepts]: Start accepts. Automaton has 4749 states and 8938 transitions. Word has length 54 [2021-11-07 01:10:18,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:18,582 INFO L470 AbstractCegarLoop]: Abstraction has 4749 states and 8938 transitions. [2021-11-07 01:10:18,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:18,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4749 states and 8938 transitions. [2021-11-07 01:10:18,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:10:18,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:18,586 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:18,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-07 01:10:18,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:18,803 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 01:10:18,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:18,803 INFO L85 PathProgramCache]: Analyzing trace with hash -665481789, now seen corresponding path program 1 times [2021-11-07 01:10:18,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:18,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859605617] [2021-11-07 01:10:18,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:18,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:18,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:18,809 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:18,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:10:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:19,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:19,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:19,559 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 01:10:19,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:19,727 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 01:10:19,728 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:19,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859605617] [2021-11-07 01:10:19,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859605617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:19,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:19,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:10:19,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182114311] [2021-11-07 01:10:19,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:10:19,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:19,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:10:19,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:10:19,730 INFO L87 Difference]: Start difference. First operand 4749 states and 8938 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:28,003 INFO L93 Difference]: Finished difference Result 13321 states and 25017 transitions. [2021-11-07 01:10:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:10:28,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:10:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:28,039 INFO L225 Difference]: With dead ends: 13321 [2021-11-07 01:10:28,039 INFO L226 Difference]: Without dead ends: 9964 [2021-11-07 01:10:28,046 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:28,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9964 states. [2021-11-07 01:10:28,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9964 to 8917. [2021-11-07 01:10:28,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8912 states have (on average 1.8855475763016158) internal successors, (16804), 8916 states have internal predecessors, (16804), 0 states have call successors, (0), 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 01:10:28,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 16804 transitions. [2021-11-07 01:10:28,571 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 16804 transitions. Word has length 55 [2021-11-07 01:10:28,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:28,571 INFO L470 AbstractCegarLoop]: Abstraction has 8917 states and 16804 transitions. [2021-11-07 01:10:28,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:28,572 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 16804 transitions. [2021-11-07 01:10:28,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:10:28,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:28,576 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] [2021-11-07 01:10:28,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:28,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:28,792 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 01:10:28,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:28,792 INFO L85 PathProgramCache]: Analyzing trace with hash 744308411, now seen corresponding path program 1 times [2021-11-07 01:10:28,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:28,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110003235] [2021-11-07 01:10:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:28,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:28,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:28,795 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:28,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:10:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:29,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:29,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:29,639 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 01:10:29,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:29,834 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 01:10:29,834 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:29,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110003235] [2021-11-07 01:10:29,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110003235] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:29,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:29,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:29,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859125910] [2021-11-07 01:10:29,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:29,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:29,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:29,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:29,836 INFO L87 Difference]: Start difference. First operand 8917 states and 16804 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:32,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:32,524 INFO L93 Difference]: Finished difference Result 17381 states and 32589 transitions. [2021-11-07 01:10:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:10:32,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 01:10:32,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:32,558 INFO L225 Difference]: With dead ends: 17381 [2021-11-07 01:10:32,559 INFO L226 Difference]: Without dead ends: 9848 [2021-11-07 01:10:32,571 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 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 01:10:32,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-11-07 01:10:33,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 8849. [2021-11-07 01:10:33,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 8844 states have (on average 1.8747173224785165) internal successors, (16580), 8848 states have internal predecessors, (16580), 0 states have call successors, (0), 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 01:10:33,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 16580 transitions. [2021-11-07 01:10:33,160 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 16580 transitions. Word has length 56 [2021-11-07 01:10:33,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:33,161 INFO L470 AbstractCegarLoop]: Abstraction has 8849 states and 16580 transitions. [2021-11-07 01:10:33,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 16580 transitions. [2021-11-07 01:10:33,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:10:33,163 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:33,163 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] [2021-11-07 01:10:33,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:33,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:33,383 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 01:10:33,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:33,383 INFO L85 PathProgramCache]: Analyzing trace with hash 454916123, now seen corresponding path program 1 times [2021-11-07 01:10:33,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:33,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19515021] [2021-11-07 01:10:33,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:33,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:33,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:33,387 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:33,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:10:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:34,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:10:34,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:34,270 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 01:10:34,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:34,502 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 01:10:34,503 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:34,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19515021] [2021-11-07 01:10:34,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19515021] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:34,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:34,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:10:34,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570521640] [2021-11-07 01:10:34,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:10:34,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:34,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:10:34,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:10:34,505 INFO L87 Difference]: Start difference. First operand 8849 states and 16580 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:37,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:37,008 INFO L93 Difference]: Finished difference Result 64605 states and 121321 transitions. [2021-11-07 01:10:37,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:10:37,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:10:37,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:37,152 INFO L225 Difference]: With dead ends: 64605 [2021-11-07 01:10:37,153 INFO L226 Difference]: Without dead ends: 55795 [2021-11-07 01:10:37,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 109 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 01:10:37,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55795 states. [2021-11-07 01:10:38,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55795 to 16688. [2021-11-07 01:10:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16688 states, 16683 states have (on average 1.8754420667745608) internal successors, (31288), 16687 states have internal predecessors, (31288), 0 states have call successors, (0), 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 01:10:38,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16688 states to 16688 states and 31288 transitions. [2021-11-07 01:10:38,313 INFO L78 Accepts]: Start accepts. Automaton has 16688 states and 31288 transitions. Word has length 57 [2021-11-07 01:10:38,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:38,313 INFO L470 AbstractCegarLoop]: Abstraction has 16688 states and 31288 transitions. [2021-11-07 01:10:38,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:38,314 INFO L276 IsEmpty]: Start isEmpty. Operand 16688 states and 31288 transitions. [2021-11-07 01:10:38,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:10:38,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:38,316 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:38,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:38,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:38,540 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 01:10:38,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:38,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1350522211, now seen corresponding path program 1 times [2021-11-07 01:10:38,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:38,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262727519] [2021-11-07 01:10:38,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:38,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:38,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:38,543 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:38,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:10:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:39,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:39,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:39,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:39,597 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 01:10:39,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:39,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262727519] [2021-11-07 01:10:39,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262727519] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:39,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:39,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:39,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701995652] [2021-11-07 01:10:39,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:39,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:39,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:39,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:39,601 INFO L87 Difference]: Start difference. First operand 16688 states and 31288 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:41,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:41,453 INFO L93 Difference]: Finished difference Result 60853 states and 114287 transitions. [2021-11-07 01:10:41,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:10:41,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:10:41,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:41,534 INFO L225 Difference]: With dead ends: 60853 [2021-11-07 01:10:41,534 INFO L226 Difference]: Without dead ends: 48801 [2021-11-07 01:10:41,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 110 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 01:10:41,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48801 states. [2021-11-07 01:10:43,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48801 to 28183. [2021-11-07 01:10:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28183 states, 28178 states have (on average 1.8769607495209029) internal successors, (52889), 28182 states have internal predecessors, (52889), 0 states have call successors, (0), 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 01:10:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28183 states to 28183 states and 52889 transitions. [2021-11-07 01:10:43,455 INFO L78 Accepts]: Start accepts. Automaton has 28183 states and 52889 transitions. Word has length 57 [2021-11-07 01:10:43,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:43,455 INFO L470 AbstractCegarLoop]: Abstraction has 28183 states and 52889 transitions. [2021-11-07 01:10:43,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:43,456 INFO L276 IsEmpty]: Start isEmpty. Operand 28183 states and 52889 transitions. [2021-11-07 01:10:43,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:10:43,458 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:43,459 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 01:10:43,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:43,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:43,676 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 01:10:43,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:43,677 INFO L85 PathProgramCache]: Analyzing trace with hash 939482835, now seen corresponding path program 1 times [2021-11-07 01:10:43,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:43,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247553000] [2021-11-07 01:10:43,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:43,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:43,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:43,679 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:43,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:10:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:44,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:10:44,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:44,417 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 01:10:44,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:44,671 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 01:10:44,671 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:44,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247553000] [2021-11-07 01:10:44,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247553000] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:44,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:44,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:10:44,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382794443] [2021-11-07 01:10:44,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:44,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:44,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:44,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:44,674 INFO L87 Difference]: Start difference. First operand 28183 states and 52889 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:52,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:52,796 INFO L93 Difference]: Finished difference Result 178393 states and 335412 transitions. [2021-11-07 01:10:52,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:10:52,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:10:52,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:53,287 INFO L225 Difference]: With dead ends: 178393 [2021-11-07 01:10:53,294 INFO L226 Difference]: Without dead ends: 154846 [2021-11-07 01:10:53,331 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:10:53,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154846 states. [2021-11-07 01:10:56,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154846 to 49001. [2021-11-07 01:10:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49001 states, 48996 states have (on average 1.8784594660788636) internal successors, (92037), 49000 states have internal predecessors, (92037), 0 states have call successors, (0), 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 01:10:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49001 states to 49001 states and 92037 transitions. [2021-11-07 01:10:56,534 INFO L78 Accepts]: Start accepts. Automaton has 49001 states and 92037 transitions. Word has length 59 [2021-11-07 01:10:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:56,534 INFO L470 AbstractCegarLoop]: Abstraction has 49001 states and 92037 transitions. [2021-11-07 01:10:56,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 49001 states and 92037 transitions. [2021-11-07 01:10:56,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:10:56,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:56,542 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:56,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:56,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:56,760 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:10:56,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:56,760 INFO L85 PathProgramCache]: Analyzing trace with hash 282834690, now seen corresponding path program 1 times [2021-11-07 01:10:56,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:56,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799979444] [2021-11-07 01:10:56,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:56,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:56,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:56,763 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:56,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:10:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:57,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:10:57,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:57,497 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 01:10:57,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:57,620 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 01:10:57,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:57,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799979444] [2021-11-07 01:10:57,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799979444] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:57,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:57,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:10:57,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376780290] [2021-11-07 01:10:57,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:57,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:57,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:57,624 INFO L87 Difference]: Start difference. First operand 49001 states and 92037 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:01,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:01,587 INFO L93 Difference]: Finished difference Result 121013 states and 226772 transitions. [2021-11-07 01:11:01,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:11:01,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:11:01,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:01,694 INFO L225 Difference]: With dead ends: 121013 [2021-11-07 01:11:01,694 INFO L226 Difference]: Without dead ends: 73900 [2021-11-07 01:11:01,723 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 128 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 01:11:01,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73900 states. [2021-11-07 01:11:04,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73900 to 48761. [2021-11-07 01:11:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48761 states, 48756 states have (on average 1.8697391090327344) internal successors, (91161), 48760 states have internal predecessors, (91161), 0 states have call successors, (0), 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 01:11:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48761 states to 48761 states and 91161 transitions. [2021-11-07 01:11:04,343 INFO L78 Accepts]: Start accepts. Automaton has 48761 states and 91161 transitions. Word has length 66 [2021-11-07 01:11:04,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:04,344 INFO L470 AbstractCegarLoop]: Abstraction has 48761 states and 91161 transitions. [2021-11-07 01:11:04,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:04,344 INFO L276 IsEmpty]: Start isEmpty. Operand 48761 states and 91161 transitions. [2021-11-07 01:11:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:11:04,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:04,347 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:04,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:11:04,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:04,573 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:11:04,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:04,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1532267487, now seen corresponding path program 1 times [2021-11-07 01:11:04,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:04,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420063001] [2021-11-07 01:11:04,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:04,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:04,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:04,576 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:04,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:11:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:05,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:11:05,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:05,284 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 01:11:05,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:05,402 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 01:11:05,402 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:05,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420063001] [2021-11-07 01:11:05,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420063001] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:05,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:05,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:11:05,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965517623] [2021-11-07 01:11:05,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:05,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:05,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:05,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:05,405 INFO L87 Difference]: Start difference. First operand 48761 states and 91161 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:07,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:07,667 INFO L93 Difference]: Finished difference Result 93033 states and 173891 transitions. [2021-11-07 01:11:07,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:07,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:11:07,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:07,736 INFO L225 Difference]: With dead ends: 93033 [2021-11-07 01:11:07,736 INFO L226 Difference]: Without dead ends: 48776 [2021-11-07 01:11:07,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 128 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 01:11:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48776 states. [2021-11-07 01:11:09,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48776 to 48761. [2021-11-07 01:11:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48761 states, 48756 states have (on average 1.8644064320288785) internal successors, (90901), 48760 states have internal predecessors, (90901), 0 states have call successors, (0), 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 01:11:10,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48761 states to 48761 states and 90901 transitions. [2021-11-07 01:11:10,014 INFO L78 Accepts]: Start accepts. Automaton has 48761 states and 90901 transitions. Word has length 66 [2021-11-07 01:11:10,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:10,015 INFO L470 AbstractCegarLoop]: Abstraction has 48761 states and 90901 transitions. [2021-11-07 01:11:10,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:10,015 INFO L276 IsEmpty]: Start isEmpty. Operand 48761 states and 90901 transitions. [2021-11-07 01:11:10,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:11:10,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:10,017 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:10,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:10,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:10,217 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:11:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:10,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1047073688, now seen corresponding path program 1 times [2021-11-07 01:11:10,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:10,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260352669] [2021-11-07 01:11:10,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:10,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:10,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:10,219 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:10,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d71566aa-bb1a-4b4f-9062-c4fa7ecc4cc5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:11:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:10,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:11:10,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:11,028 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 01:11:11,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:11,264 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 01:11:11,264 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:11,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260352669] [2021-11-07 01:11:11,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260352669] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:11,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:11,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:11:11,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213058492] [2021-11-07 01:11:11,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:11:11,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:11,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:11:11,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:11,266 INFO L87 Difference]: Start difference. First operand 48761 states and 90901 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)